Single-Carrier-and-Multicarrier-Transceivers-Base

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Single-Carrier and MT Based on Discrete Cosine Transform Type-IV
Single-Carrier-and-Multicarrier-Transceivers-Base
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内容介绍
<html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta charset="utf-8"> <meta name="generator" content="pdf2htmlEX"> <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"> <link rel="stylesheet" href="https://static.pudn.com/base/css/base.min.css"> <link rel="stylesheet" href="https://static.pudn.com/base/css/fancy.min.css"> <link rel="stylesheet" href="https://static.pudn.com/prod/directory_preview_static/6259fa82be9ad24cfacc84c8/raw.css"> <script src="https://static.pudn.com/base/js/compatibility.min.js"></script> <script src="https://static.pudn.com/base/js/pdf2htmlEX.min.js"></script> <script> try{ pdf2htmlEX.defaultViewer = new pdf2htmlEX.Viewer({}); }catch(e){} </script> <title></title> </head> <body> <div id="sidebar" style="display: none"> <div id="outline"> </div> </div> <div id="pf1" class="pf w0 h0" data-page-no="1"><div class="pc pc1 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="https://static.pudn.com/prod/directory_preview_static/6259fa82be9ad24cfacc84c8/bg1.jpg"><div class="t m0 x1 h2 y1 ff1 fs0 fc0 sc0 ls0 ws0">6454<span class="_ _0"> </span>IEEE<span class="_ _1"> </span>TRANSA<span class="_ _2"></span>CTIONS<span class="_ _1"> </span>ON<span class="_ _1"> </span>WI<span class="_ _2"></span>RELESS<span class="_ _1"> </span>COMM<span class="ls1">UNICA<span class="_ _3"></span>TIONS,<span class="_ _4"> </span>V<span class="_ _2"></span>OL.<span class="_ _1"> </span>12,<span class="_ _1"> </span>NO.<span class="_ _1"> </span>12,<span class="_ _5"> </span>DECEMBER<span class="_ _4"> </span>2013</span></div><div class="t m0 x2 h3 y2 ff1 fs1 fc0 sc0 ls2 ws0">Single-Carrier<span class="_ _6"> </span>and<span class="_ _7"> </span>Multicarrier<span class="_ _6"> </span>T<span class="_ _3"></span>ranscei<span class="_ _2"></span>v<span class="_ _2"></span>ers</div><div class="t m0 x3 h3 y3 ff1 fs1 fc0 sc0 ls3 ws0">Based<span class="_ _7"> </span>on<span class="_ _7"> </span>Discrete<span class="_ _6"> </span>Cosine<span class="_ _7"> </span>T<span class="_ _3"></span>ransform<span class="_ _7"> </span>T<span class="_ _8"></span>ype-IV</div><div class="t m0 x4 h4 y4 ff1 fs2 fc0 sc0 ls4 ws0">Fernando<span class="_ _9"> </span>Cruz-Rol<span class="_ _2"></span>d<span class="_ _a"></span>&#180;<span class="_ _b"></span><span class="ls5">an,<span class="_ _c"> </span><span class="ff2 ls6">Senior<span class="_ _9"> </span>Member<span class="_ _3"></span>,<span class="_ _9"> </span>IEEE,<span class="_ _c"> </span><span class="ff1 ls7">M.<span class="_ _c"> </span>Elen<span class="_ _d"></span>a<span class="_ _c"> </span>Dom&#180;<span class="_ _e"></span><span class="ls8">&#305;nguez-Ji<span class="_ _2"></span>m<span class="_ _a"></span>&#180;<span class="_ _b"></span>enez,</span></span></span></span></div><div class="t m0 x5 h4 y5 ff1 fs2 fc0 sc0 ls9 ws0">Gabriel<span class="_ _2"></span>a<span class="_ _c"> </span>Sansigre<span class="_ _c"> </span>V<span class="_ _3"></span>idal,<span class="_ _c"> </span>Jos<span class="_ _a"></span>&#180;<span class="_ _b"></span><span class="lsa">eP<span class="_ _f"></span>i<span class="_ _10"></span>&#732;<span class="_ _11"></span><span class="ls5">neiro-<span class="_ _2"></span>A<span class="_ _3"></span>ve,<span class="_ _9"> </span>and<span class="_ _c"> </span>Manuel<span class="_ _c"> </span>Blanco-V<span class="_ _12"></span>elasco,<span class="_ _9"> </span><span class="ff2 ls6">Senior<span class="_ _9"> </span>Member<span class="_ _3"></span>,<span class="_ _9"> </span>IEEE</span></span></span></div><div class="t m0 x6 h5 y6 ff3 fs3 fc0 sc0 lsb ws0">Abstract<span class="ff4 lsc">&#8212;Mu<span class="_ _d"></span>lticarrier<span class="_ _5"> </span>and<span class="_ _1"> </span>si<span class="_ _d"></span>ngle-carrier<span class="_ _5"> </span>communi<span class="_ _d"></span>cations<span class="_ _5"> </span>can</span></div><div class="t m0 x1 h5 y7 ff4 fs3 fc0 sc0 ls2 ws0">be<span class="_ _13"> </span>performed<span class="_ _13"> </span>by<span class="_ _13"> </span>using<span class="_ _13"> </span>dif<span class="_ _d"></span>ferent<span class="_ _13"> </span>orthogonal<span class="_ _13"> </span>tran<span class="_ _d"></span>sforms.<span class="_ _13"> </span>In</div><div class="t m0 x1 h5 y8 ff4 fs3 fc0 sc0 lsd ws0">this<span class="_ _13"> </span>wo<span class="_ _2"></span>rk,<span class="_ _13"> </span>we<span class="_ _13"> </span>derive<span class="_ _13"> </span>the<span class="_ _13"> </span>co<span class="_ _2"></span>nditions<span class="_ _13"> </span>to<span class="_ _13"> </span>use<span class="_ _13"> </span>discr<span class="_ _2"></span>ete<span class="_ _13"> </span>cosine</div><div class="t m0 x1 h5 y9 ff4 fs3 fc0 sc0 lse ws0">transform<span class="_ _14"> </span>type-IV<span class="_ _14"> </span>even<span class="_ _14"> </span>(DCT4e)<span class="_ _14"> </span>in<span class="_ _14"> </span>th<span class="_ _d"></span>ese<span class="_ _14"> </span>contexts.<span class="_ _14"> </span>Basi<span class="_ _d"></span>cally<span class="_ _2"></span>,</div><div class="t m0 x1 h5 ya ff4 fs3 fc0 sc0 lsf ws0">these<span class="_ _9"> </span>conditions<span class="_ _9"> </span>are<span class="_ _9"> </span>the<span class="_ _c"> </span>two<span class="_ _9"> </span>fo<span class="_ _2"></span>llowing<span class="_ _2"></span>:<span class="_ _c"> </span>1)<span class="_ _c"> </span>The<span class="_ _9"> </span>channel<span class="_ _9"> </span>impulse</div><div class="t m0 x1 h5 yb ff4 fs3 fc0 sc0 ls10 ws0">res<span class="_ _2"></span>ponse<span class="_"> </span>has<span class="_"> </span>to<span class="_"> </span>be<span class="_"> </span>s<span class="_ _2"></span>ymme<span class="_ _2"></span>tric.<span class="_"> </span>2)<span class="_"> </span>Redundancy<span class="_ _4"> </span>(a<span class="_"> </span>pr<span class="_ _2"></span>e&#64257;x<span class="_"> </span>and<span class="_"> </span>als<span class="_ _2"></span>o<span class="_"> </span>a</div><div class="t m0 x1 h5 yc ff4 fs3 fc0 sc0 ls11 ws0">suf&#64257;x<span class="_ _5"> </span>guard<span class="_ _15"> </span>sequenc<span class="_ _2"></span>e)<span class="_ _15"> </span>must<span class="_ _5"> </span>be<span class="_ _15"> </span>appended<span class="_ _5"> </span>into<span class="_ _15"> </span>eac<span class="_ _2"></span>h<span class="_ _15"> </span>data<span class="_ _15"> </span>symbo<span class="_ _2"></span>l</div><div class="t m0 x1 h5 yd ff4 fs3 fc0 sc0 ls12 ws0">to<span class="_ _16"> </span>be<span class="_ _16"> </span>transmitted.<span class="_ _16"> </span>T<span class="_ _3"></span>o<span class="_ _16"> </span>satisfy<span class="_ _16"> </span>t<span class="ls13">he<span class="_ _16"> </span>former<span class="_ _3"></span>,<span class="_ _16"> </span>a<span class="_ _16"> </span>front-end<span class="_ _16"> </span>pre&#64257;lter</span></div><div class="t m0 x1 h5 ye ff4 fs3 fc0 sc0 ls14 ws0">must<span class="_ _9"> </span>be<span class="_ _15"> </span>incorporated<span class="_ _9"> </span>at<span class="_ _15"> </span>the<span class="_ _9"> </span>recei<span class="_ _2"></span>ver<span class="_ _3"></span>.<span class="_ _15"> </span>With<span class="_ _15"> </span>regard<span class="_ _9"> </span>to<span class="_ _15"> </span>th<span class="_ _d"></span>e<span class="_ _15"> </span>second</div><div class="t m0 x1 h5 yf ff4 fs3 fc0 sc0 ls15 ws0">condit<span class="_ _d"></span>ion,<span class="_ _9"> </span>we<span class="_ _9"> </span>use<span class="_ _9"> </span>a<span class="_ _9"> </span>matri<span class="_ _d"></span>x<span class="_ _9"> </span>formulation<span class="_ _9"> </span>to<span class="_ _9"> </span>d<span class="_ _d"></span>emonstrate<span class="_ _c"> </span>how<span class="_ _9"> </span>the</div><div class="t m0 x1 h5 y10 ff4 fs3 fc0 sc0 ls15 ws0">global<span class="_ _16"> </span>tran<span class="_ _d"></span>smission<span class="_ _17"> </span>chann<span class="_ _d"></span>el<span class="_ _16"> </span>matrix<span class="_ _16"> </span>can<span class="_ _16"> </span>be<span class="_ _16"> </span>diagon<span class="_ _d"></span>alized<span class="_ _16"> </span>wh<span class="_ _d"></span>en</div><div class="t m0 x1 h5 y11 ff4 fs3 fc0 sc0 lsf ws0">symm<span class="_ _2"></span>etric<span class="_ _18"> </span>extens<span class="_ _2"></span>ion<span class="_ _18"> </span>or<span class="_ _18"> </span>z<span class="_ _2"></span>ero<span class="_ _c"> </span>padding<span class="_ _18"> </span>ar<span class="_ _2"></span>e<span class="_ _18"> </span>used<span class="_ _18"> </span>a<span class="_ _2"></span>s<span class="_ _18"> </span>re<span class="_ _2"></span>dundancy<span class="_ _3"></span>.</div><div class="t m0 x1 h5 y12 ff4 fs3 fc0 sc0 lsf ws0">The<span class="_ _19"> </span>use<span class="_ _19"> </span>of<span class="_ _13"> </span>zero<span class="_ _19"> </span>padding<span class="_ _13"> </span>requir<span class="_ _2"></span>es<span class="_ _13"> </span>an<span class="_ _1a"> </span>additional<span class="_ _13"> </span>block<span class="_ _13"> </span>at</div><div class="t m0 x1 h5 y13 ff4 fs3 fc0 sc0 ls16 ws0">the<span class="_ _16"> </span>receiv<span class="_ _2"></span>er<span class="_ _3"></span>,<span class="_ _17"> </span>whose<span class="_ _17"> </span>structure<span class="_ _16"> </span>is<span class="_ _16"> </span>al<span class="_ _d"></span>so<span class="_ _16"> </span>shown.<span class="_ _16"> </span>M<span class="_ _d"></span>oreo<span class="_ _2"></span>ver<span class="_ _3"></span>,<span class="_ _16"> </span>a<span class="_ _17"> </span>new</div><div class="t m0 x1 h5 y14 ff4 fs3 fc0 sc0 ls17 ws0">expression<span class="_ _1b"> </span>based<span class="_ _1b"> </span>on<span class="_ _1b"> </span>the<span class="_ _1b"> </span>DCT4e<span class="_ _1b"> </span>to<span class="_ _1c"> </span>obtain<span class="_ _1b"> </span>the<span class="_ _1c"> </span>value<span class="_ _1b"> </span>of<span class="_ _1b"> </span>the</div><div class="t m0 x1 h5 y15 ff4 fs3 fc0 sc0 ls18 ws0">per<span class="_ _2"></span>-subc<span class="_ _2"></span>arrie<span class="_ _2"></span>r<span class="_ _1c"> </span>coef&#64257;c<span class="_ _2"></span>ients<span class="_ _14"> </span>of<span class="_ _1c"> </span>the<span class="_ _1c"> </span>freque<span class="_ _2"></span>ncy-do<span class="_ _2"></span>main<span class="_ _14"> </span>equalizer</div><div class="t m0 x1 h5 y16 ff4 fs3 fc0 sc0 lse ws0">is<span class="_ _18"> </span>derived.<span class="_ _18"> </span>Fin<span class="_ _d"></span>ally<span class="_ _2"></span>,<span class="_ _18"> </span>the<span class="_ _18"> </span>proposed<span class="_ _18"> </span>transceivers<span class="_ _18"> </span>are<span class="_ _18"> </span>compared<span class="_ _18"> </span>to</div><div class="t m0 x1 h5 y17 ff4 fs3 fc0 sc0 ls19 ws0">the<span class="_ _15"> </span>DFT<span class="_ _3"></span>-based<span class="_ _15"> </span>standardized<span class="_ _15"> </span>systems<span class="_ _15"> </span>in<span class="_ _15"> </span>di<span class="_ _d"></span>fferent<span class="_ _5"> </span>communicati<span class="_ _d"></span>on</div><div class="t m0 x1 h5 y18 ff4 fs3 fc0 sc0 ls1a ws0">scena<span class="_ _2"></span>rios<span class="_ _9"> </span>under<span class="_ _15"> </span>the<span class="_ _9"> </span>pr<span class="_ _2"></span>esence<span class="_ _15"> </span>of<span class="_ _9"> </span>car<span class="_ _2"></span>rier<span class="_ _9"> </span>fre<span class="_ _2"></span>quency<span class="_ _15"> </span>offset.</div><div class="t m0 x6 h5 y19 ff3 fs3 fc0 sc0 ls1b ws0">Index<span class="_ _1d"> </span>T<span class="_ _3"></span>erms<span class="ff4 ls14">&#8212;Mul<span class="_ _d"></span>ticarrier<span class="_ _1d"> </span>transceiv<span class="_ _2"></span>er<span class="_ _3"></span>,<span class="_ _1d"> </span>multicarrier</span></div><div class="t m0 x1 h5 y1a ff4 fs3 fc0 sc0 ls1c ws0">modulation<span class="_ _1e"> </span>(MCM),<span class="_ _1e"> </span>discrete<span class="_ _1f"> </span>Fourier<span class="_ _1f"> </span>transform<span class="_ _1f"> </span>(DFT),</div><div class="t m0 x1 h5 y1b ff4 fs3 fc0 sc0 ls1d ws0">discr<span class="_ _2"></span>ete<span class="_ _7"> </span>co<span class="_ _2"></span>sine<span class="_ _7"> </span>transf<span class="_ _2"></span>orm<span class="_ _7"> </span>(D<span class="_ _2"></span>CT),<span class="_ _7"> </span>sing<span class="_ _2"></span>le-carr<span class="_ _2"></span>ier<span class="_ _7"> </span>freque<span class="_ _2"></span>ncy</div><div class="t m0 x1 h5 y1c ff4 fs3 fc0 sc0 ls1e ws0">domain<span class="_ _5"> </span>equalization<span class="_ _5"> </span>(SC-FDE),<span class="_ _15"> </span>single-c<span class="_ _2"></span>arrier<span class="_ _5"> </span>frequency<span class="_ _5"> </span>domain</div><div class="t m0 x1 h5 y1d ff4 fs3 fc0 sc0 ls1f ws0">multip<span class="_ _d"></span>le<span class="_ _7"> </span>access<span class="_ _7"> </span>(SC-FDMA),<span class="_ _7"> </span>orthogonal<span class="_ _7"> </span>frequency-d<span class="_ _d"></span>ivision</div><div class="t m0 x1 h5 y1e ff4 fs3 fc0 sc0 ls20 ws0">multiplexing<span class="_ _15"> </span>(OFDM),<span class="_ _15"> </span>carri<span class="ls21">er<span class="_ _2"></span>-frequency<span class="_ _15"> </span>offset<span class="_ _9"> </span>(CFO).</span></div><div class="t m0 x7 h6 y1f ff1 fs4 fc0 sc0 ls22 ws0">I.<span class="_ _17"> </span>I<span class="fs5 ls23">NTRODUC<span class="_ _2"></span>TION</span></div><div class="t m0 x1 h7 y20 ff4 fs6 fc0 sc0 ls24 ws0">M</div><div class="t m0 x8 h6 y21 ff1 fs4 fc0 sc0 ls25 ws0">UL<span class="_ _3"></span>TICAR<span class="_ _2"></span>RIER<span class="_ _19"> </span>MODULA<span class="_ _20"></span>TION<span class="_ _13"> </span>(MCM)<span class="_ _19"> </span>based<span class="_ _19"> </span>on</div><div class="t m0 x8 h6 y22 ff1 fs4 fc0 sc0 ls26 ws0">the<span class="_ _17"> </span>Discrete<span class="_ _14"> </span>Fourier<span class="_ _16"> </span>Trans<span class="_ _2"></span>form<span class="_ _17"> </span>(DFT)<span class="_ _14"> </span>has<span class="_ _17"> </span>been<span class="_ _14"> </span>the</div><div class="t m0 x1 h6 y23 ff1 fs4 fc0 sc0 ls27 ws0">dominant<span class="_ _15"> </span>m<span class="_ _d"></span>edium-access<span class="_ _15"> </span>technique<span class="_ _15"> </span>in<span class="_ _c"> </span>the<span class="_ _9"> </span>&#64257;xed<span class="_ _15"> </span>and<span class="_ _9"> </span>nomadic</div><div class="t m0 x1 h6 y24 ff1 fs4 fc0 sc0 ls28 ws0">broadband<span class="_ _18"> </span>communi<span class="_ _2"></span>cations<span class="_ _18"> </span>(s<span class="_ _2"></span>ee<span class="_ _18"> </span>e.g.<span class="_ _16"> </span>[1],<span class="_ _18"> </span>[2]).<span class="_ _18"> </span>Since<span class="_ _18"> </span>release</div><div class="t m0 x1 h6 y25 ff1 fs4 fc0 sc0 ls29 ws0">8,<span class="_ _21"> </span>it<span class="_ _21"> </span>is<span class="_ _22"> </span>the<span class="_ _21"> </span>medium<span class="_ _21"> </span>access<span class="_ _21"> </span>technique<span class="_ _21"> </span>chosen<span class="_ _21"> </span>for<span class="_ _21"> </span>the</div><div class="t m0 x1 h6 y26 ff1 fs4 fc0 sc0 ls2a ws0">downlink<span class="_"> </span>in<span class="_ _4"> </span>next<span class="_"> </span>generation<span class="_"> </span>mobile<span class="_"> </span>comm<span class="_ _d"></span>unications<span class="_"> </span>(L<span class="_ _20"></span>TE<span class="_"> </span>and</div><div class="t m0 x1 h6 y27 ff1 fs4 fc0 sc0 ls2b ws0">L<span class="_ _20"></span>TE-Advanced)<span class="_ _5"> </span>[3],<span class="_ _9"> </span>[4].</div><div class="t m0 x6 h6 y28 ff1 fs4 fc0 sc0 ls2c ws0">MCM<span class="_ _18"> </span>has<span class="_ _18"> </span>signi&#64257;cant<span class="_ _18"> </span>adv<span class="_ _2"></span>antages<span class="_ _18"> </span>such<span class="_ _18"> </span>as<span class="_ _18"> </span>its<span class="_ _18"> </span>effecti<span class="_ _2"></span>venes<span class="_ _2"></span>s</div><div class="t m0 x1 h6 y29 ff1 fs4 fc0 sc0 ls2d ws0">against<span class="_ _17"> </span>m<span class="_ _d"></span>ultipath<span class="_ _17"> </span>o<span class="_ _d"></span>r<span class="_ _17"> </span>fr<span class="_ _d"></span>equency<span class="_ _16"> </span>selective<span class="_ _17"> </span>fading,<span class="_ _17"> </span>or<span class="_ _14"> </span>the<span class="_ _14"> </span>use</div><div class="t m0 x1 h6 y2a ff1 fs4 fc0 sc0 ls2e ws0">of<span class="_ _1c"> </span>bit<span class="_ _1b"> </span>loading<span class="_ _1c"> </span>algorithms<span class="_ _1c"> </span>to<span class="_ _1c"> </span>improve<span class="_ _1c"> </span>sys<span class="_ _2"></span>tem<span class="_ _1b"> </span>performance</div><div class="t m0 x9 h8 y2b ff1 fs5 fc0 sc0 ls2f ws0">Manuscript<span class="_ _9"> </span>recei<span class="_ _2"></span>ved<span class="_ _15"> </span>April<span class="_ _15"> </span>29,<span class="_ _15"> </span>2013;<span class="_ _15"> </span>revised<span class="_ _15"> </span>Septem<span class="_ _d"></span>ber<span class="_ _15"> </span>6,<span class="_ _15"> </span>2013;<span class="_ _15"> </span>accepted</div><div class="t m0 x1 h8 y2c ff1 fs5 fc0 sc0 ls30 ws0">September<span class="_ _4"> </span>25,<span class="_ _4"> </span>2013.<span class="_ _1"> </span>The<span class="_"> </span>associate<span class="_ _1"> </span>editor<span class="_ _4"> </span>c<span class="ls31">oordinating<span class="_ _1"> </span>the<span class="_ _4"> </span>revie<span class="_ _2"></span>w<span class="_ _4"> </span>of<span class="_ _4"> </span>this<span class="_ _4"> </span>paper</span></div><div class="t m0 x1 h8 y2d ff1 fs5 fc0 sc0 ls32 ws0">and<span class="_ _15"> </span>approving<span class="_ _15"> </span>it<span class="_ _15"> </span>for<span class="_ _5"> </span>publication<span class="_ _9"> </span>was<span class="_ _15"> </span>Luc<span class="_ _5"> </span>D<span class="_ _d"></span>eneire.</div><div class="t m0 x9 h8 y2e ff1 fs5 fc0 sc0 ls2f ws0">This<span class="_ _4"> </span>work<span class="_ _1"> </span>was<span class="_"> </span>partially<span class="_ _1"> </span>s<span class="_ _d"></span>upported<span class="_ _4"> </span>by<span class="_ _1"> </span>the<span class="_"> </span>Spanish<span class="_ _1"> </span>Ministry<span class="_ _1"> </span>of<span class="_ _4"> </span>Econom<span class="_ _d"></span>y<span class="_"> </span>and</div><div class="t m0 x1 h8 y2f ff1 fs5 fc0 sc0 ls33 ws0">Competitiv<span class="_ _2"></span>eness<span class="_ _5"> </span>through<span class="_ _4"> </span>project<span class="_ _1"> </span>TE<span class="_ _d"></span>C2012-38058-C03-01,<span class="_ _1"> </span>and<span class="_"> </span>by<span class="_ _4"> </span>the<span class="_ _4"> </span>Spanis<span class="_ _d"></span>h</div><div class="t m0 x1 h8 y30 ff1 fs5 fc0 sc0 ls34 ws0">Ministry<span class="_ _15"> </span>of<span class="_ _15"> </span>Education,<span class="_ _15"> </span>Culture<span class="_ _15"> </span>and<span class="_ _15"> </span>Sports<span class="_ _15"> </span>through<span class="_ _15"> </span>project<span class="_ _9"> </span>PRX12/00064.</div><div class="t m0 x9 h8 y31 ff1 fs5 fc0 sc0 ls35 ws0">F<span class="_ _2"></span>.<span class="_ _16"> </span>Cruz-Rold<span class="_ _a"></span>&#180;<span class="_ _23"></span><span class="ls36">an,<span class="_ _1c"> </span>J.<span class="_ _17"> </span>Pi<span class="_ _a"></span>&#732;<span class="_ _23"></span><span class="ls37">neiro-A<span class="_ _2"></span>v<span class="_ _2"></span>e,<span class="_ _14"> </span>and<span class="_ _14"> </span>M.<span class="_ _14"> </span>Blanco-V<span class="_ _3"></span>elasco<span class="_ _1c"> </span>are<span class="_ _14"> </span>with<span class="_ _14"> </span>the</span></span></div><div class="t m0 x1 h8 y32 ff1 fs5 fc0 sc0 ls38 ws0">Department<span class="_ _18"> </span>of<span class="_ _18"> </span>T<span class="_ _3"></span>eor&#180;<span class="_ _24"></span><span class="ls39">&#305;a<span class="_ _18"> </span>de<span class="_ _18"> </span>la<span class="_ _18"> </span>Se<span class="_ _d"></span>&#732;<span class="_ _23"></span><span class="ls3a">nal<span class="_ _18"> </span>y<span class="_ _c"> </span>Com<span class="_ _d"></span>unicaciones,<span class="_ _16"> </span>Escuela<span class="_ _18"> </span>P<span class="_ _d"></span>olit<span class="_ _d"></span>&#180;<span class="_ _23"></span><span class="ls3b">ecnica</span></span></span></div><div class="t m0 x1 h8 y33 ff1 fs5 fc0 sc0 ls31 ws0">Superior<span class="_ _c"> </span>de<span class="_ _c"> </span>la<span class="_ _c"> </span>Univ<span class="_ _2"></span>ersidad<span class="_ _c"> </span>de<span class="_ _c"> </span>A<span class="_ _d"></span>lcal<span class="_ _d"></span>&#180;<span class="_ _23"></span><span class="ls3c">a,<span class="_ _18"> </span>28871<span class="_ _9"> </span>Alcal<span class="_ _a"></span>&#180;<span class="_ _23"></span><span class="ls39">a<span class="_ _c"> </span>de<span class="_ _c"> </span>Henares<span class="_ _18"> </span>(Madrid),</span></span></div><div class="t m0 x1 h9 y34 ff1 fs5 fc0 sc0 ls3d ws0">Spain<span class="_ _15"> </span>(e-<span class="_ _d"></span>mail:<span class="_ _15"> </span><span class="ff5 ls24">{</span><span class="ls30">fernando.cruz,<span class="_ _9"> </span>jose.pineiro,<span class="_ _9"> </span>manuel.blanco<span class="ff5 ls24">}</span><span class="ls3e">@uah.es).</span></span></div><div class="t m0 x9 h8 y35 ff1 fs5 fc0 sc0 ls3f ws0">M.<span class="_ _1"> </span>E<span class="_ _d"></span>.<span class="_ _1"> </span>Dom&#180;<span class="_ _24"></span><span class="ls2f">&#305;nguez-Jim<span class="_ _a"></span>&#180;<span class="_ _23"></span><span class="ls40">enez<span class="_ _15"> </span>and<span class="_ _5"> </span>G.<span class="_ _1"> </span>S<span class="_ _d"></span>ansigre<span class="_ _5"> </span>V<span class="_ _2"></span>idal<span class="_ _5"> </span><span class="ls41">are<span class="_ _5"> </span>w<span class="_ _d"></span>ith<span class="_ _5"> </span>the<span class="_ _5"> </span>Departm<span class="_ _d"></span>ent</span></span></span></div><div class="t m0 x1 h8 y36 ff1 fs5 fc0 sc0 ls30 ws0">of<span class="_ _15"> </span>Matem<span class="_ _d"></span>&#180;<span class="_ _23"></span><span class="ls42">atica<span class="_ _9"> </span>Aplicada<span class="_ _9"> </span>a<span class="_ _15"> </span>la<span class="_ _15"> </span>Ingenier&#180;<span class="_ _10"></span><span class="ls36">&#305;a<span class="_ _9"> </span>Industrial,<span class="_ _9"> </span>Escuela<span class="_ _15"> </span>T<span class="_ _a"></span>&#180;<span class="_ _23"></span><span class="ls43">ecnica<span class="_ _9"> </span>Superior</span></span></span></div><div class="t m0 x1 h8 y37 ff1 fs5 fc0 sc0 ls44 ws0">de<span class="_ _4"> </span>Ingenieros<span class="_ _5"> </span>Industriales,<span class="_ _5"> </span>Universidad<span class="_ _1"> </span>Polit<span class="_ _a"></span>&#180;<span class="_ _23"></span>ecnica<span class="_ _5"> </span>de<span class="_ _4"> </span>Madrid,<span class="_ _5"> </span>28006<span class="_ _1"> </span>Madrid,</div><div class="t m0 x1 h9 y38 ff1 fs5 fc0 sc0 ls3d ws0">Spain<span class="_ _15"> </span>(e-<span class="_ _d"></span>mail:<span class="_ _15"> </span><span class="ff5 ls24">{</span><span class="ls36">elena.dominguez,<span class="_ _9"> </span>gabriela.<span class="_ _d"></span>sansigre<span class="ff5 ls24">}</span><span class="ls45">@upm.es).</span></span></div><div class="t m0 x9 h8 y39 ff1 fs5 fc0 sc0 ls35 ws0">Digital<span class="_ _15"> </span>Object<span class="_ _15"> </span>Identi&#64257;er<span class="_ _9"> </span>10.1109/TWC.2013.<span class="_ _d"></span>111313.130751</div><div class="t m0 xa h6 y6 ff1 fs4 fc0 sc0 ls25 ws0">with<span class="_ _21"> </span>a<span class="_ _22"> </span>signi&#64257;cant<span class="_ _21"> </span>increase<span class="_ _21"> </span>in<span class="_ _21"> </span>data<span class="_ _21"> </span>rate<span class="_ _21"> </span>per<span class="_ _21"> </span>subcarrier</div><div class="t m0 xa h6 y3a ff1 fs4 fc0 sc0 ls27 ws0">[5].<span class="_ _19"> </span>Howe<span class="_ _2"></span>ver<span class="_ _2"></span>,<span class="_ _19"> </span>the<span class="_ _19"> </span>DFT<span class="_ _3"></span>-based<span class="_ _1a"> </span>MCM<span class="_ _19"> </span>also<span class="_ _1a"> </span>presents<span class="_ _19"> </span>some</div><div class="t m0 xa h6 y3b ff1 fs4 fc0 sc0 ls2b ws0">drawbacks<span class="_ _2"></span>:<span class="_ _16"> </span>sensiti<span class="_ _2"></span>vit<span class="_ _2"></span>y<span class="_ _16"> </span>to<span class="_ _17"> </span>time<span class="_ _16"> </span>and,<span class="_ _16"> </span>especially<span class="_ _3"></span>,<span class="_ _16"> </span>to<span class="_ _17"> </span>frequency</div><div class="t m0 xa h6 y3c ff1 fs4 fc0 sc0 ls2b ws0">synchronization,<span class="_ _16"> </span>high<span class="_ _14"> </span>ratio<span class="_ _1c"> </span>between<span class="_ _14"> </span>peak-to-a<span class="_ _2"></span>verage<span class="_ _17"> </span>power</div><div class="t m0 xa h6 y3d ff1 fs4 fc0 sc0 ls46 ws0">ratio<span class="_ _1b"> </span>(<span class="_ _d"></span>P<span class="_ _20"></span>APR),<span class="_ _13"> </span>and<span class="_ _1b"> </span>redu<span class="_ _d"></span>ced<span class="_ _1b"> </span>frequ<span class="_ _d"></span>ency<span class="_ _1c"> </span>discrim<span class="_ _d"></span>ination.<span class="_ _1b"> </span>This</div><div class="t m0 xa h6 y3e ff1 fs4 fc0 sc0 ls47 ws0">leads<span class="_ _1a"> </span>to<span class="_ _1a"> </span>poor<span class="_ _1a"> </span>system<span class="_ _1a"> </span>performance<span class="_ _1a"> </span>in<span class="_ _1a"> </span>&#64257;xed<span class="_ _1a"> </span>and<span class="_ _1a"> </span>mobile</div><div class="t m0 xa h6 y3f ff1 fs4 fc0 sc0 ls48 ws0">noisy<span class="_ _9"> </span>en<span class="_ _2"></span>vironments.<span class="_ _15"> </span>T<span class="_ _3"></span>o<span class="_ _c"> </span>av<span class="_ _2"></span>oid<span class="_ _9"> </span>some<span class="_ _c"> </span>of<span class="_ _c"> </span>the<span class="_ _c"> </span>abov<span class="_ _2"></span>e<span class="_ _9"> </span>constraints,</div><div class="t m0 xa h6 y40 ff1 fs4 fc0 sc0 ls49 ws0">some<span class="_ _19"> </span>standards<span class="_ _13"> </span>include<span class="_ _19"> </span>the<span class="_ _19"> </span>use<span class="_ _19"> </span>of<span class="_ _1a"> </span>other<span class="_ _19"> </span>medium-access</div><div class="t m0 xa h6 y41 ff1 fs4 fc0 sc0 ls28 ws0">techniques.<span class="_"> </span>Thi<span class="_ _2"></span>s<span class="_"> </span>is<span class="_ _5"> </span>the<span class="_ _5"> </span>case<span class="_"> </span>of<span class="_ _5"> </span>L<span class="_ _3"></span>TE,<span class="_"> </span>which<span class="_"> </span>proposes<span class="_"> </span>the<span class="_"> </span>use<span class="_ _5"> </span>of</div><div class="t m0 xa h6 y42 ff1 fs4 fc0 sc0 ls4a ws0">single-carrier<span class="_ _15"> </span>frequ<span class="_ _d"></span>ency<span class="_ _5"> </span>d<span class="_ _d"></span>i<span class="_ _2"></span>vision<span class="_ _9"> </span>multiple<span class="_ _15"> </span>access<span class="_ _9"> </span>(SC-FDMA)</div><div class="t m0 xa h6 y43 ff1 fs4 fc0 sc0 ls4b ws0">for<span class="_ _9"> </span>the<span class="_ _9"> </span>uplink<span class="_ _15"> </span>[3].</div><div class="t m0 xb h6 y44 ff1 fs4 fc0 sc0 ls4c ws0">Many<span class="_"> </span>dif<span class="_ _2"></span>ferent<span class="_"> </span>solutions<span class="_"> </span>ha<span class="_ _2"></span>ve<span class="_"> </span>been<span class="_"> </span>proposed<span class="_"> </span>as<span class="_ _15"> </span>alternati<span class="_ _2"></span>ves</div><div class="t m0 xa h6 y45 ff1 fs4 fc0 sc0 ls4d ws0">to<span class="_ _1a"> </span>DFT<span class="_ _20"></span>-based<span class="_ _19"> </span>systems,<span class="_ _19"> </span>such<span class="_ _1a"> </span>as<span class="_ _1a"> </span>the<span class="_ _1a"> </span>use<span class="_ _1a"> </span>of<span class="_ _1a"> </span>&#64257;lter<span class="_ _19"> </span>banks</div><div class="t m0 xa h6 y46 ff1 fs4 fc0 sc0 ls28 ws0">[6]&#8211;[9]<span class="_ _c"> </span>or<span class="_ _c"> </span>discrete<span class="_ _18"> </span>t<span class="_ _2"></span>rigonometric<span class="_ _9"> </span>transforms<span class="_ _c"> </span>(DTTs)<span class="_ _c"> </span>to<span class="_ _18"> </span>carry</div><div class="t m0 xa h6 y47 ff1 fs4 fc0 sc0 ls28 ws0">out<span class="_ _21"> </span>the<span class="_ _25"> </span>block<span class="_ _25"> </span>transforms<span class="_ _25"> </span>included<span class="_ _25"> </span>in<span class="_ _25"> </span>the<span class="_ _21"> </span>single-carrier</div><div class="t m0 xa h6 y48 ff1 fs4 fc0 sc0 ls28 ws0">or<span class="_ _1a"> </span>the<span class="_ _1a"> </span>multicarrier<span class="_ _19"> </span>transcei<span class="_ _2"></span>vers<span class="_ _19"> </span>[10]&#8211;[17].<span class="_ _13"> </span>In<span class="_ _1a"> </span>[12],<span class="_ _1a"> </span>it<span class="_ _1a"> </span>is</div><div class="t m0 xa h6 y49 ff1 fs4 fc0 sc0 ls4e ws0">sho<span class="_ _2"></span>wn<span class="_ _9"> </span>that<span class="_ _15"> </span>DCT<span class="_ _9"> </span>T<span class="_ _20"></span>ype-II<span class="_ _9"> </span>e<span class="_ _2"></span>ven</div><div class="t m0 xc h2 y4a ff1 fs0 fc0 sc0 ls24 ws0">1</div><div class="t m0 xd h6 y4b ff1 fs4 fc0 sc0 ls4e ws0">-based<span class="_ _15"> </span>multicarrier<span class="_ _15"> </span>modulators</div><div class="t m0 xa h6 y4c ff1 fs4 fc0 sc0 ls4f ws0">(DCT2e-MCM)<span class="_ _15"> </span>can<span class="_ _c"> </span>perfectly<span class="_ _9"> </span>diagonali<span class="_ _2"></span>ze<span class="_ _9"> </span>frequency-se<span class="_ _2"></span>lecti<span class="_ _2"></span>ve</div><div class="t m0 xa h6 y4d ff1 fs4 fc0 sc0 ls50 ws0">channels<span class="_ _6"> </span>without<span class="_ _6"> </span>requiring<span class="_ _6"> </span>channel<span class="_ _26"> </span>know<span class="_ _2"></span>ledge<span class="_ _6"> </span>at<span class="_ _26"> </span>the</div><div class="t m0 xa h6 y4e ff1 fs4 fc0 sc0 ls51 ws0">transmitter,<span class="_ _18"> </span>with<span class="_ _c"> </span>DCT2<span class="_ _d"></span>e-MCM<span class="_ _18"> </span>being<span class="_ _18"> </span>more<span class="_ _18"> </span>robust<span class="_ _18"> </span>to<span class="_ _18"> </span>carrier</div><div class="t m0 xa h6 y4f ff1 fs4 fc0 sc0 ls26 ws0">frequency<span class="_ _13"> </span>offset<span class="_ _19"> </span>(CFO)<span class="_ _19"> </span>than<span class="_ _1a"> </span>DFT<span class="_ _20"></span>-MCM.<span class="_ _19"> </span>An<span class="_ _1a"> </span>intercarrier</div><div class="t m0 xa h6 y50 ff1 fs4 fc0 sc0 ls4e ws0">interference<span class="_ _22"> </span>(ICI)<span class="_ _7"> </span>analys<span class="_ _2"></span>is<span class="_ _7"> </span>for<span class="_ _22"> </span>a<span class="_ _7"> </span>DCT2e-MCM<span class="_ _7"> </span>sys<span class="_ _2"></span>tem</div><div class="t m0 xa h6 y51 ff1 fs4 fc0 sc0 ls4c ws0">operating<span class="_ _4"> </span>in<span class="_"> </span>the<span class="_"> </span>presence<span class="_ _4"> </span>of<span class="_"> </span>CF<span class="_ _2"></span>O<span class="_"> </span>over<span class="_ _4"> </span>additi<span class="_ _2"></span>ve<span class="_ _4"> </span>white<span class="_"> </span>Gauss<span class="_ _2"></span>ian</div><div class="t m0 xa h6 y52 ff1 fs4 fc0 sc0 ls50 ws0">noise<span class="_ _18"> </span>(A<span class="_ _3"></span>WGN)<span class="_ _18"> </span>channels<span class="_ _16"> </span>is<span class="_ _16"> </span>presented<span class="_ _18"> </span>in<span class="_ _16"> </span>[13].<span class="_ _16"> </span>On<span class="_ _16"> </span>the<span class="_ _18"> </span>other</div><div class="t m0 xa h6 y53 ff1 fs4 fc0 sc0 ls4a ws0">side,<span class="_ _18"> </span>a<span class="_ _c"> </span>new<span class="_ _c"> </span>sin<span class="_ _d"></span>gle-carrier<span class="_ _9"> </span>freq<span class="_ _d"></span>uency<span class="_ _9"> </span>d<span class="_ _d"></span>i<span class="_ _2"></span>vision<span class="_ _18"> </span>multiple<span class="_ _c"> </span>access</div><div class="t m0 xa h6 y54 ff1 fs4 fc0 sc0 ls4c ws0">system<span class="_ _9"> </span>based<span class="_ _15"> </span>on<span class="_ _9"> </span>the<span class="_ _9"> </span>DCT2e<span class="_ _9"> </span>has<span class="_ _9"> </span>been<span class="_ _9"> </span>proposed<span class="_ _15"> </span>in<span class="_ _9"> </span>[17].</div><div class="t m0 xa ha y55 ff2 fs4 fc0 sc0 ls4e ws0">A.<span class="_ _17"> </span>Pr<span class="_ _2"></span>opertie<span class="_ _2"></span>s<span class="_ _9"> </span>of<span class="_ _9"> </span>DCT<span class="_ _3"></span>-based<span class="_ _9"> </span>Systems</div><div class="t m0 xb h6 y56 ff1 fs4 fc0 sc0 ls52 ws0">The<span class="_ _13"> </span>interest<span class="_ _13"> </span>of<span class="_ _13"> </span>using<span class="_ _13"> </span>DCT2e<span class="_ _13"> </span>instead<span class="_ _13"> </span>of<span class="_ _19"> </span>DFT<span class="_ _13"> </span>is<span class="_ _13"> </span>well</div><div class="t m0 xa h6 y57 ff1 fs4 fc0 sc0 ls2b ws0">documented<span class="_ _15"> </span>in<span class="_ _9"> </span>sev<span class="_ _2"></span>eral<span class="_ _9"> </span>works<span class="_ _2"></span>,<span class="_ _9"> </span>e.g.,<span class="_ _9"> </span>[12],<span class="_ _15"> </span>[13]:</div><div class="t m0 xb h6 y58 ff6 fs0 fc0 sc0 ls24 ws0">&#8226;<span class="_ _1b"> </span><span class="ff1 fs4 ls47">The<span class="_ _18"> </span>DCT<span class="_ _9"> </span>bases<span class="_ _18"> </span>ha<span class="_ _2"></span>ve<span class="_ _9"> </span>excellent<span class="_ _9"> </span>spectral<span class="_ _c"> </span>compaction<span class="_ _9"> </span>and</span></div><div class="t m0 xe h6 y59 ff1 fs4 fc0 sc0 ls27 ws0">energy<span class="_"> </span>concentration<span class="_ _4"> </span>proper<span class="ls53">ties,<span class="_"> </span>and<span class="_"> </span>generate<span class="_"> </span>much<span class="_"> </span>more</span></div><div class="t m0 xe h6 y5a ff1 fs4 fc0 sc0 ls4f ws0">frequency<span class="_"> </span>selecti<span class="_ _2"></span>ve<span class="_ _15"> </span>&#64257;lter<span class="_ _15"> </span>banks<span class="_ _15"> </span>than<span class="_ _15"> </span>the<span class="_ _15"> </span>DFT<span class="_ _9"> </span>&#64257;lt<span class="_ _2"></span>er<span class="_ _9"> </span>bank,</div><div class="t m0 xe h6 y5b ff1 fs4 fc0 sc0 ls4c ws0">that<span class="_"> </span>is,<span class="_"> </span>a<span class="_"> </span>better<span class="_"> </span>separation<span class="_"> </span>among<span class="_"> </span>subchannels<span class="_ _4"> </span>is<span class="_"> </span>obtained</div><div class="t m0 xe h6 y5c ff1 fs4 fc0 sc0 ls2c ws0">and<span class="_ _1b"> </span>the<span class="_ _1b"> </span>spectral<span class="_ _1c"> </span>ef&#64257;ciency<span class="_ _1c"> </span>is<span class="_ _1b"> </span>improved.<span class="_ _1c"> </span>As<span class="_ _1b"> </span>a<span class="_ _1b"> </span>result,</div><div class="t m0 xe h6 y5d ff1 fs4 fc0 sc0 ls46 ws0">the<span class="_ _c"> </span>channel<span class="_ _9"> </span>estim<span class="_ _d"></span>ation<span class="_ _9"> </span>an<span class="_ _d"></span>d<span class="_ _9"> </span>also<span class="_ _9"> </span>th<span class="_ _d"></span>e<span class="_ _9"> </span>sy<span class="_ _d"></span>stem<span class="_ _9"> </span>perfo<span class="_ _d"></span>rmance</div><div class="t m0 xe h6 y5e ff1 fs4 fc0 sc0 ls54 ws0">(BEP)<span class="_ _9"> </span>can<span class="_ _9"> </span>be<span class="_ _9"> </span>impro<span class="_ _2"></span>ved<span class="_ _15"> </span>in<span class="_ _9"> </span>noisy<span class="_ _9"> </span>en<span class="_ _2"></span>vironments<span class="_ _2"></span>.</div><div class="t m0 xb h6 y5f ff6 fs0 fc0 sc0 ls24 ws0">&#8226;<span class="_ _1b"> </span><span class="ff1 fs4 ls4c">In<span class="_ _18"> </span>the<span class="_ _c"> </span>presence<span class="_ _9"> </span>of<span class="_ _18"> </span>frequenc<span class="_ _2"></span>y<span class="_ _9"> </span>offse<span class="_ _2"></span>t,<span class="_ _c"> </span>the<span class="_ _c"> </span>ICI<span class="_ _c"> </span>coef&#64257;cients</span></div><div class="t m0 xe h6 y60 ff1 fs4 fc0 sc0 ls4e ws0">in<span class="_ _16"> </span>DCT<span class="_ _20"></span>-MCM<span class="_ _16"> </span>are<span class="_ _17"> </span>more<span class="_ _16"> </span>concentrated<span class="_ _18"> </span>around<span class="_ _16"> </span>the<span class="_ _16"> </span>main</div><div class="t m0 xe h6 y61 ff1 fs4 fc0 sc0 ls55 ws0">coef&#64257;cient.<span class="_ _9"> </span>As<span class="_ _c"> </span>a<span class="_ _c"> </span>result,<span class="_ _18"> </span>DCT<span class="_ _20"></span>-MCM<span class="_ _c"> </span>systems<span class="_ _c"> </span>offer<span class="_ _9"> </span>better</div><div class="t m0 xe h6 y62 ff1 fs4 fc0 sc0 ls28 ws0">robus<span class="_ _2"></span>tness<span class="_ _4"> </span>against<span class="_"> </span>CFO.<span class="_"> </span>A<span class="_ _2"></span>s<span class="_"> </span>it<span class="_"> </span>is<span class="_"> </span>kno<span class="_ _2"></span>wn,<span class="_"> </span>this<span class="_ _4"> </span>effect<span class="_ _4"> </span>results</div><div class="t m0 xe h6 y63 ff1 fs4 fc0 sc0 ls53 ws0">in<span class="_ _14"> </span>sev<span class="_ _2"></span>ere<span class="_ _14"> </span>OFDM<span class="_ _14"> </span>performance<span class="_ _17"> </span>degradation<span class="_ _17"> </span>in<span class="_ _14"> </span>wireless</div><div class="t m0 xe h6 y64 ff1 fs4 fc0 sc0 ls56 ws0">mobile<span class="_ _15"> </span>communications.</div><div class="t m0 xf hb y65 ff1 fs7 fc0 sc0 ls24 ws0">1</div><div class="t m0 x10 h8 y66 ff1 fs5 fc0 sc0 ls57 ws0">Eight<span class="_ _15"> </span>dif<span class="_ _2"></span>ferent<span class="_ _15"> </span>types<span class="_ _9"> </span>of<span class="_ _1"> </span>D<span class="_ _d"></span>CTs<span class="_ _15"> </span>are<span class="_ _5"> </span>shown<span class="_ _5"> </span>in<span class="_ _15"> </span>[20].</div><div class="t m0 x11 h8 y67 ff1 fs5 fc0 sc0 ls58 ws0">1536-1276/13$31.00</div><div class="t m0 xf h8 y68 ff1 fs5 fc0 sc0 ls24 ws0">c</div><div class="t m0 x12 h9 y67 ff5 fs5 fc0 sc0 ls24 ws0">&#58882;<span class="_ _5"> </span><span class="ff1 ls59">2013<span class="_ _15"> </span>IEEE</span></div></div><div class="pi" data-data='{"ctm":[1.568627,0.000000,0.000000,1.568627,0.000000,0.000000]}'></div></div> </body> </html>
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