13.rar_qam_matlab例程_数值算法/人工智能下载-pudn.com

<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/622b5f8015da9b288b20e70f/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/622b5f8015da9b288b20e70f/bg1.jpg"><div class="t m0 x1 h2 y1 ff1 fs0 fc0 sc0 ls0 ws0"><span class="fc1 sc0">第３１卷第２期</span></div><div class="t m1 x2 h2 y1 ff1 fs0 fc0 sc0 ls0 ws0"><span class="fc1 sc0">昆明理工大学学报（理工版）</span></div><div class="t m2 x3 h3 y2 ff1 fs1 fc0 sc0 ls0 ws0"><span class="fc1 sc0">Ｖ０１．３１</span></div><div class="t m3 x4 h3 y3 ff1 fs1 fc0 sc0 ls0 ws0"><span class="fc1 sc0">Ｎｏ．２</span></div><div class="t m4 x5 h4 y4 ff1 fs2 fc0 sc0 ls0 ws0"><span class="fc1 sc0">２００６年４月</span></div><div class="t m5 x6 h3 y4 ff1 fs1 fc0 sc0 ls0 ws0"><span class="fc1 sc0">Ｊｏｕｍａｌ</span></div><div class="t m6 x7 h3 y5 ff1 fs1 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｏｆ</span></div><div class="t m7 x8 h3 y6 ff1 fs1 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ＫｕｒＩＩＩｌｉｎｇ</span></div><div class="t m6 x9 h3 y4 ff1 fs1 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｕＩｌｉｖｅ瑙ｉｔｙ</span></div><div class="t m6 xa h3 y5 ff1 fs1 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｏｆ</span></div><div class="t m6 xb h4 y4 ff1 fs2 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｓｃｉｅｎｃｅ蚰ｄ’ｒｅｃｈｎｏｌｏｇ），（ｓｃｉｅｎｃｅ</span></div><div class="t m8 xc h3 y5 ff1 fs1 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ａｎｄ</span></div><div class="t m9 xd h4 y4 ff1 fs2 fc0 sc0 ls0 ws0"><span class="fc1 sc0">７ｒｅｃｈｎｏｌｏｇｙ）</span></div><div class="t ma xe h5 y6 ff1 fs3 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ＡＰ生—兰堕</span></div><div class="t mb xf h6 y7 ff1 fs4 fc0 sc0 ls0 ws0"><span class="fc1 sc0">基于已知特性信道的ＱＡＭ系统的仿真和性能分析</span></div><div class="t mc x10 h7 y8 ff1 fs5 fc0 sc0 ls0 ws0"><span class="fc1 sc0">宋耀莲，邵玉斌，张起晶，江晶</span></div><div class="t md x11 h4 y9 ff1 fs2 fc0 sc0 ls0 ws0"><span class="fc1 sc0">（昆明理工大学信息工程与自动化学院，云南昆明６５００５１）</span></div><div class="t me x12 h8 ya ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">摘要：论述了正交幅度调制（ＱＡＭ）的原理和特性，并在已知特性的通信信道上进行ＱＡＭ调制</span></div><div class="t mf x12 h8 yb ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">和解调仿真，对具有符号间干扰（ＩＳＩ）的信道进行线性均衡和判决反馈均衡来提高ＱＡＭ调制解</span></div><div class="t m10 x12 h8 yc ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">调的性能．通过对得到的仿真结果进行比较和分析，在理论上，得到合理设计ＱＡＭ系统的方法．</span></div><div class="t m11 x12 h8 yd ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">这些分析方法和得到的结论对工程中的ＱＡＭ调制解调系统实现具有一定的价值．</span></div><div class="t m12 x12 h8 ye ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">关键词：正交幅度调制；线性均衡器；符号间干扰；信噪比；调剂解调</span></div><div class="t m13 x13 h9 yf ff1 fs7 fc0 sc0 ls0 ws0"><span class="fc1 sc0">中图分类号：邢１５．０５</span></div><div class="t m14 x14 h8 yf ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">文献标识码：Ａ</span></div><div class="t m15 x15 h2 yf ff1 fs0 fc0 sc0 ls0 ws0"><span class="fc1 sc0">文章编号：１００７—８５５Ｘ（２００６）０１—００５７—０５</span></div><div class="t m8 x16 h7 y10 ff1 fs5 fc0 sc0 ls0 ws0"><span class="fc1 sc0">Ｓｉｍｍａｔｉｏｎ</span></div><div class="t m16 x17 h2 y10 ff1 fs0 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ａｎｄ</span></div><div class="t m17 x18 ha y10 ff1 fs8 fc0 sc0 ls0 ws0"><span class="fc1 sc0">Ｐｅｒｆｏｒｍ肌ｃｅ</span></div><div class="t m18 x19 h8 y11 ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ＡＩＩａｌｙｓｉｓ</span></div><div class="t m19 x1a h3 y10 ff1 fs1 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｏｎ</span></div><div class="t m1a x1b h8 y10 ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｔｈｅ</span></div><div class="t m1b x1c h7 y11 ff1 fs5 fc0 sc0 ls0 ws0"><span class="fc1 sc0">Ｓｙｓｔｅｍ</span></div><div class="t m1c x1d h8 y10 ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｏｆ</span></div><div class="t m1d x1e hb y11 ff1 fs9 fc0 sc0 ls0 ws0"><span class="fc1 sc0">Ｑ劬ａｔｕｒｅ</span></div><div class="t m1e x1f hc y11 ff1 fsa fc0 sc0 ls0 ws0"><span class="fc1 sc0">Ａ瑚【ｐＨｔｕｄｅ</span></div><div class="t m1f x20 hc y12 ff1 fsa fc0 sc0 ls0 ws0"><span class="fc1 sc0">Ｍｏｄｌｌｌａｔｉｏｎ</span></div><div class="t m20 x21 h8 y12 ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ａｎｄ</span></div><div class="t m21 x22 h7 y12 ff1 fs5 fc0 sc0 ls0 ws0"><span class="fc1 sc0">Ｄｅｍｏｄｌｌｌａｔｉｏｎ</span></div><div class="t m22 x23 h8 y12 ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">Ｂａｓｅｄ</span></div><div class="t m19 x24 h3 y12 ff1 fs1 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｏｎ</span></div><div class="t m5 x25 h2 y12 ff1 fs0 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｔｈｅ</span></div><div class="t m23 x26 h8 y12 ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">Ｋｎｏｗｎ</span></div><div class="t m24 x27 hd y12 ff1 fsb fc0 sc0 ls0 ws0"><span class="fc1 sc0">Ｃｈ籼ｅｌｓ</span></div><div class="t m25 x28 h2 y13 ff1 fs0 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ＳＯＮＧ</span></div><div class="t m26 x29 h2 y14 ff1 fs0 fc0 sc0 ls0 ws0"><span class="fc1 sc0">Ｙａｏ－Ｉｉａｎ，ＳＨＡＯ</span></div><div class="t m27 x2a h2 y14 ff1 fs0 fc0 sc0 ls0 ws0"><span class="fc1 sc0">Ｙｕ－ｂｉｎ，ＺＨＡＮＧ</span></div><div class="t m28 x2b h7 y14 ff1 fs5 fc0 sc0 ls0 ws0"><span class="fc1 sc0">Ｑ－－ｊｉｎｇ，Ｊ</span></div><div class="t m29 x2c h2 y15 ff1 fs0 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ＩＡＮＧ</span></div><div class="t m2a x2d h2 y14 ff1 fs0 fc0 sc0 ls0 ws0"><span class="fc1 sc0">Ｊｌｎｇ</span></div><div class="t m2b x12 h4 y16 ff1 fs2 fc0 sc0 ls0 ws0"><span class="fc1 sc0">（ＦａｃＩｌｌｔ），ｏｆ</span></div><div class="t m2c x2e h8 y16 ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">Ｉ血髓埘伽勘西ｎｅｅｒｉＩｌｇ肌ｄ</span></div><div class="t m2d x2f h4 y16 ff1 fs2 fc0 sc0 ls0 ws0"><span class="fc1 sc0">Ａ１ｌｔ０ＩＩｌａ￡ｉ∞，Ｋ１皿面Ｉｌｇ</span></div><div class="t m2e x30 h3 y17 ff1 fs1 fc0 sc0 ls0 ws0"><span class="fc1 sc0">Ｕ“ｖｅｒｓｉｔ），ｏｆ</span></div><div class="t m2f x31 h8 y16 ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">Ｓｃｉｅｎｃｅ蛳ｄ’‰Ｉｌ砌。盯，Ｋ衄Ｉｎｉｎｇ＠００１５ｌ，ＣＩｌｉｎａ）</span></div><div class="t m30 x1 h3 y18 ff1 fs1 fc0 sc0 ls0 ws0"><span class="fc1 sc0">Ａｂｓｔｒａｃｔ：Ｔｈｅ</span></div><div class="t m31 x32 h4 y19 ff1 fs2 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｂａｓｉｃ山ｅｏｒｙ</span></div><div class="t m32 x11 h3 y1a ff1 fs1 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ａｎｄ</span></div><div class="t m33 x33 h8 y19 ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｐｅｒｆｂ聊ａｎｃｅ</span></div><div class="t m34 x34 h3 y1a ff1 fs1 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｏｆ</span></div><div class="t m35 x35 h3 y1a ff1 fs1 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｔｌｌｅ</span></div><div class="t m36 x36 h7 y19 ff1 fs5 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｑｕａｄｒａｔｕｒｅ锄ｐｌｉｔｕｄｅ</span></div><div class="t m37 x37 h4 y1a ff1 fs2 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｍｏｄｕｌａｔｉｏｎ</span></div><div class="t m2e x27 h4 y1b ff1 fs2 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ａＩｌｄ</span></div><div class="t m37 x38 h4 y1b ff1 fs2 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｄｅｍｏｄｕｌａｔｉｏｎ</span></div><div class="t m35 x39 h3 y1b ff1 fs1 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｉｓ</span></div><div class="t m38 x3a h4 y1b ff1 fs2 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｄｅ—</span></div><div class="t m37 x1 h4 y1c ff1 fs2 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｓｃｒｉｂｅｄ．Ｔｈｒｏｕｇｈ</span></div><div class="t m8 x6 h3 y1d ff1 fs1 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｔｈｅ</span></div><div class="t m39 x3b h3 y1d ff1 fs1 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｋｎｏｗｎ</span></div><div class="t m37 x3c h4 y1c ff1 fs2 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｃｈａｎｎｅｌｓ，ｑｕａｄｒａｔｕＩｅ</span></div><div class="t m3a x3d h4 y1e ff1 fs2 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ａｍｐｌｉｔｕｄｅ</span></div><div class="t m37 x3e h4 y1f ff1 fs2 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｍｏｄｕｌａｔｉｏｎ</span></div><div class="t m1b x3f h4 y1f ff1 fs2 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ａｎｄ</span></div><div class="t m37 x40 h4 y1f ff1 fs2 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｄｅｍｏｄｕｌａｔｉｏｎ</span></div><div class="t m35 x38 h3 y1f ff1 fs1 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｉｓ</span></div><div class="t m3b x41 h4 y1f ff1 fs2 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｓｉｍｕｌａｔｅｄ．</span></div><div class="t m3c x42 h2 y1f ff1 fs0 fc0 sc0 ls0 ws0"><span class="fc1 sc0">Ｗｈｅｎ</span></div><div class="t m38 x1 h4 y20 ff1 fs2 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｔｌｌｅ</span></div><div class="t m3d x43 h4 y21 ff1 fs2 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｉｎｔｅｒｓｙｍｂｏｌ</span></div><div class="t m3e x32 h4 y20 ff1 fs2 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｉｎｔｅｒｆｅｒｅｎｃｅ</span></div><div class="t m1c x44 h3 y22 ff1 fs1 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｅｘｉｓｔｓ</span></div><div class="t m6 x45 h3 y22 ff1 fs1 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｉｎ</span></div><div class="t m38 x46 h4 y22 ff1 fs2 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｔ１１ｅ</span></div><div class="t m3f x47 h3 y21 ff1 fs1 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｃｈａｎｎｅｌｓ，ｉｔ</span></div><div class="t m35 x48 h3 y22 ff1 fs1 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｉｓ</span></div><div class="t m40 x49 h3 y21 ff1 fs1 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｎｅｃｅｓｓａｒ）ｒ</span></div><div class="t m1b x4a he y22 ff1 fsc fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｔｏ</span></div><div class="t m41 x4b h4 y21 ff1 fs2 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ａｄｏｐｔ</span></div><div class="t m1c x4c h3 y22 ff1 fs1 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｌｉｎｅａｒ</span></div><div class="t m8 x4d h3 y21 ff1 fs1 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｅｑｕａｌｉｚｅｒ</span></div><div class="t m25 x4e hf y22 ff1 fsd fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｏｒ</span></div><div class="t m37 x4f h4 y22 ff1 fs2 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｄｅｃｉｓｉｏｎ—ｆｅｅｄｂａｃｋ</span></div><div class="t m8 x1 h3 y23 ff1 fs1 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｅｑｕａｌｉｚｅｒ</span></div><div class="t m1b x50 he y24 ff1 fsc fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｔｏ</span></div><div class="t m42 x51 h4 y23 ff1 fs2 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｉｍｐｍｖｅ</span></div><div class="t m43 x52 h4 y24 ff1 fs2 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｔｈｅ</span></div><div class="t m33 x53 h8 y23 ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｐｅｒｆｂ册强ｃｅ</span></div><div class="t m34 x14 h3 y24 ff1 fs1 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｏｆ</span></div><div class="t m38 x54 h4 y24 ff1 fs2 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｔｌｌｅ</span></div><div class="t m44 x55 h4 y23 ff1 fs2 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｓｙｓｔｅｍ．Ｔｈｅｎ</span></div><div class="t m45 x56 h4 y24 ff1 fs2 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｔｌｌｅ</span></div><div class="t m46 x57 h3 y24 ff1 fs1 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｒｅｓｕｌｔｓ</span></div><div class="t m47 x58 hf y25 ff1 fsd fc0 sc0 ls0 ws0"><span class="fc1 sc0">ａｒｅ</span></div><div class="t m6 x59 h4 y23 ff1 fs2 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ａＩｌａｌｙｚｅｄ</span></div><div class="t m48 xd h4 y24 ff1 fs2 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ａｎｄ</span></div><div class="t m3f x2d h4 y23 ff1 fs2 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｃｏｍｐａｒｅｄ</span></div><div class="t m6 x5a h3 y25 ff1 fs1 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｉｎ</span></div><div class="t m41 x5b h4 y25 ff1 fs2 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｏｒｄｅｒ</span></div><div class="t m1b x39 he y25 ff1 fsc fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｔｏ</span></div><div class="t m49 x3a h3 y25 ff1 fs1 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｄｅ·</span></div><div class="t m4a x5c h2 y26 ff1 fs0 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｓｉ印ｔｌｌｅ印ｐｌｉｃａｂｌｅ</span></div><div class="t m1b x28 h4 y26 ff1 fs2 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｓｙｓｔｅｍ，ｗｈｉｃｈ</span></div><div class="t m4b x5d hf y27 ff1 fsd fc0 sc0 ls0 ws0"><span class="fc1 sc0">ａｒｅ</span></div><div class="t m4c x5e h4 y28 ff1 fs2 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｖａｌｕａｂｌｅ</span></div><div class="t m1b x5f he y28 ff1 fsc fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｔｏ</span></div><div class="t m38 x60 h4 y28 ff1 fs2 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｔｌｌｅ</span></div><div class="t m5 x61 h3 y29 ff1 fs1 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｓｙｓｔｅｍ</span></div><div class="t m34 x62 h3 y28 ff1 fs1 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｏｆ</span></div><div class="t m4d x63 h7 y29 ff1 fs5 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｑｕａｄｒａｔｕｒｅ锄ｐｌｉｔｕｄｅ</span></div><div class="t m37 x64 h4 y28 ff1 fs2 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｍｏｄｕｌａｔｉｏｎ</span></div><div class="t m32 x5a h3 y28 ff1 fs1 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ａｎｄ</span></div><div class="t m4e x65 h4 y28 ff1 fs2 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｄｅｍｏｄｕｌａ－</span></div><div class="t m35 x1 h3 y2a ff1 fs1 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｔｉｏｎ．</span></div><div class="t m4f x5c h4 y2b ff1 fs2 fc0 sc0 ls0 ws0"><span class="fc1 sc0">Ｋｅｙ</span></div><div class="t m50 x13 h7 y2c ff1 fs5 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｗＯｒｄ＿ｓ：ｑｕａｄｒａｔｕｒｅ锄ｐｌｉｔｕｄｅ</span></div><div class="t m37 x66 h4 y2d ff1 fs2 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｍｏｄｕｌａｔｉｏｎ</span></div><div class="t m5 x67 h3 y2e ff1 fs1 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ａｎｄ</span></div><div class="t m43 x68 h4 y2b ff1 fs2 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｄｅｍｏｄｕｌａｔｉｏｎ；ｌｉｎｅａｒ</span></div><div class="t m51 x69 h3 y2e ff1 fs1 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ＭＳＥ</span></div><div class="t m40 x6a h4 y2b ff1 fs2 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｅｑｕａｌｉｚｅｒ；ｍｅ</span></div><div class="t m52 x38 h3 y2b ff1 fs1 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｉｎｔｅｒｓｙｍｂｏｌｉｎｔｅｒｆｅｒ－</span></div><div class="t m53 x6b h4 y2f ff1 fs2 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｅｎｃｅ；ｓｉｇｎａｌ—ｔｏ—ｎｏｉｓｅ；ｍｏｄｕｌａｔｉｏｎ</span></div><div class="t m1b x60 h4 y30 ff1 fs2 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ａｎｄ</span></div><div class="t m37 x6c h4 y30 ff1 fs2 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｄｅｍｏｄｕｌａｔｉｏｎ</span></div><div class="t m54 x1 h8 y31 ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">Ｏ引言</span></div><div class="t m55 x12 h8 y32 ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">在通信中，数字基带信号不可能在诸如无线信道、光纤信道等传输媒质中直接传输．与模拟信号一样，</span></div><div class="t m56 x5c h8 y33 ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">必须经调制后才能在这些媒质中传输．信号在传输过程中需要占用一定的带宽，且数字信号传输比模拟信</span></div><div class="t m56 x5c h8 y34 ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">号传输对带宽的要求更高．在通信高速发展的今天，随着各种增值业务的不断产生，对通信质量要求越来</span></div><div class="t m57 x5c h8 y35 ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">越高，使信号传输对频带需求也越来越多，但由于技术和频带资源等的限制，要在有限的带宽内，在不影响</span></div><div class="t m56 x5c h8 y36 ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">原有的业务的情况下，实现传输大数据量的音频、视频信号，必须采用特殊的调制方式来解决有限带宽和</span></div><div class="t m58 x5c h8 y37 ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">大量数据传输之间的矛盾．ＱＡＭ是相位和幅度联合的调制方式，综合了幅移键控（ＡｓＫ）和相移键控</span></div><div class="t m59 x5c h8 y38 ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">（ＰＳＫ）的优点．采用多进制正交幅度调制（ＭＱＡＭ）可以提高信息传输速率，且ＭＱＡＭ在频带利用率和接</span></div><div class="t m56 x5c h8 y39 ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">收端误译码率等指标上，比单一调制正弦波的一个参数的调制方式要优越得多，有效地缓解了传输网络的</span></div><div class="t m5a x1 h8 y3a ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">带宽矛盾．目前，。ＱＡＭ在中、高速调制解调器中得到了广泛应用，如：在大、中容量的微波通信、非对称数字</span></div><div class="t m5b x1 h8 y3b ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">用户环路（ＡＤＳＬ）、数字电视广播一有线方式（ＤＶＢ—Ｃ）和视频点播（ＶＯＤ）等等通信系统中使用．本文在</span></div><div class="t m5c x1 h8 y3c ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">参考文献［１］的基础上，对星座图映射理论进行了进一步改进，用同一算法仿真实现任意进制的ＱＡＭ星</span></div><div class="t m3e x6d h4 y3d ff1 fs2 fc0 sc0 ls0 ws0"><span class="fc1 sc0">收稿日期：２００５—０７—１５．</span></div><div class="t m5d x6e h2 y3e ff1 fs0 fc0 sc0 ls0 ws0"><span class="fc1 sc0">第一作者简介：宋耀莲（１９７７一），女，硕士研究生．主要研究方向：通信系统与个人通信网络技术</span></div><div class="t m5e x6 h4 y3f ff1 fs2 fc0 sc0 ls0 ws0"><span class="fc1 sc0">Ｅ—ｍａｉｌ：ｓｙｌ７１９＠１６３．ｃｏｍ；８０ｎｇｙａｏｌｉ蛐．ｓｔｕｄｅｎｔ＠ｓｉｎａ．ｃｏｍ</span></div><div class="t m6 x6f h7 y40 ff2 fs5 fc0 sc0 ls0 ws0"><span class="fc1 sc0">　</span><span class="_ _0"></span><span class="fc1 sc0">万方数据</span></div></div><div class="pi" data-data='{"ctm":[1.851296,0.000000,0.000000,1.851296,0.000000,0.000000]}'></div></div> </body> </html>

<div id="pf2" class="pf w0 h0" data-page-no="2"><div class="pc pc2 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="https://static.pudn.com/prod/directory_preview_static/622b5f8015da9b288b20e70f/bg2.jpg"><div class="t m5f xf he y41 ff1 fsc fc0 sc0 ls0 ws0"><span class="fc1 sc0">５８</span></div><div class="t m60 x54 h4 y4 ff1 fs2 fc0 sc0 ls0 ws0"><span class="fc1 sc0">昆明理正大学学报（理工版）</span></div><div class="t m26 x70 h4 y4 ff1 fs2 fc0 sc0 ls0 ws0"><span class="fc1 sc0">第３１卷</span></div><div class="t m61 x5 h8 y42 ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">座图，并验证了公式（４）逶合任意进制的Ｑ轰醚调潮。同时，结合线性均衡纛判决反馈瑗论，对已知特性的</span></div><div class="t m62 x5 h8 y43 ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">信道来仿真Ｍ进制ＱＡＭ，并对仿真结果进行分析．</span></div><div class="t m63 x5 h7 y44 ff1 fs5 fc0 sc0 ls0 ws0"><span class="fc1 sc0">１正交幅度调制（ＱＡＭ）原理</span></div><div class="t m64 x71 h8 y45 ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">Ｅｌｊ信息序列｛口。｝形成的两个分离的．｜｝比特符号同时加在两个正交载波ｃｏｓ∞。ｔ和ｓｉｎ∞。ｆ上，称为正交</span></div><div class="t m65 x5 h7 y46 ff1 fs5 fc0 sc0 ls0 ws0"><span class="fc1 sc0">烈嬲或ＱＡ嬲，调制信号波形可表示为¨，６</span></div><div class="t m6 x72 hf y47 ff1 fsd fc0 sc0 ls0 ws0"><span class="fc1 sc0">Ｊ：</span></div><div class="t m6 x73 h10 y48 ff1 fse fc0 sc0 ls0 ws0"><span class="fc1 sc0">一</span></div><div class="t m6 x74 h11 y49 ff1 fsf fc0 sc0 ls0 ws0"><span class="fc1 sc0">■</span></div><div class="t m66 x75 h2 y4a ff1 fs0 fc0 sc0 ls0 ws0"><span class="fc1 sc0">Ｓ。（＃）＝Ｐ。ｅｏｓｏ吒￡＋口。ｓｉｌｌ甜。＃</span></div><div class="t m67 x76 h2 y4a ff1 fs0 fc0 sc0 ls0 ws0"><span class="fc1 sc0">（１）</span></div><div class="t m68 x5 h8 y4b ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">其中：ｍ＝ｌ，２，…，胍Ｍ为正交幅</span></div><div class="t m69 x77 h8 y4c ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">度调制的调制状态数（艇＝２“，珏为</span></div><div class="t m6a x77 h8 y4d ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">一正整数，表示每个码元代表的比特</span></div><div class="t m69 x77 h8 y4e ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">位数）．调制信号式由两路相互正交</span></div><div class="t m6b x77 h8 y4f ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">的载波叠加两成的，两路载波分别被</span></div><div class="t m6c x77 h7 y50 ff1 fs5 fc0 sc0 ls0 ws0"><span class="fc1 sc0">两绣离散的振幅序列｛■ｌ、｛口。｝进</span></div><div class="t m3f x77 h2 y51 ff1 fs0 fc0 sc0 ls0 ws0"><span class="fc1 sc0">行幅度调制．ＭＱＡＭ调制框图如图ｌ</span></div><div class="t m6a x5 h8 y52 ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">所示。首先把簸入序刭经过串／并转</span></div><div class="t m6d x5 h8 y15 ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">换分成两路，在根据星座图进行２一</span></div><div class="t m6e x78 h8 y53 ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">￡电平转换，其中￡＝√Ｍ是每路的</span></div><div class="t m6b x5 h8 y1b ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">电平幅度个数，然后送行低通虑波纛</span></div><div class="t m6a x5 h8 y1d ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">载波调制，把两路调制后的信号相加</span></div><div class="t m6e x5 h8 y22 ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">就是公式（１）所示的调制信号．图２</span></div><div class="t m6f x78 h8 y54 ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">是酝ＱＡ醚鳃调框图．假设信道是理</span></div><div class="t m69 x5 h8 y29 ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">想信道，在无噪生的情况下，图２的</span></div><div class="t m69 x78 h8 y55 ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">输入是公式（１）所示的调制信号，蓠</span></div><div class="t m6e x78 h8 y2c ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">先把经过信道的已调信号分别与两</span></div><div class="t m6a x78 h8 y56 ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">路正交载波相乘，两路信号分别表示</span></div><div class="t m6a x78 h8 y57 ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">为如公式（２）、（３）所示＂Ｊ。然后两路</span></div><div class="t m6f x78 h8 y58 ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">信号分别进行低通虑波除去高次谐</span></div><div class="t m6b x78 h8 y59 ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">波，再经抽样判决得到厶个电平后，</span></div><div class="t m69 x78 h8 y5a ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">经毛一２电乎转换得到檑应的二进制</span></div><div class="t m6 x24 h4 y5b ff1 fs2 fc0 sc0 ls0 ws0"><span class="fc1 sc0">图ｌ</span></div><div class="t m70 x25 h4 y5c ff1 fs2 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ＭＱＡＭ调制器</span></div><div class="t m71 x79 h2 y18 ff1 fs0 fc0 sc0 ls0 ws0"><span class="fc1 sc0">Ｆｌｇ．１磁ＱＡ醒ｍｏ粕Ｉｌ鑫协ｒ</span></div><div class="t m6 x7a h4 y5d ff1 fs2 fc0 sc0 ls0 ws0"><span class="fc1 sc0">图２</span></div><div class="t m72 x7b h4 y5d ff1 fs2 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ＭＱＡＭ解调器</span></div><div class="t m3 x63 he y32 ff1 fsc fc0 sc0 ls0 ws0"><span class="fc1 sc0">Ｆｉｇ．２</span></div><div class="t m73 x58 h4 y32 ff1 fs2 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ＭＱＡＭ</span></div><div class="t m5 x6a h3 y5e ff1 fs1 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ｄｍｏｄｕｌａｔｏｒ</span></div><div class="t m74 x5 h8 y5f ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">序列，最后把两路二进制序列进行并／串转换得到输出信号．</span></div><div class="t m75 x73 h12 y60 ff1 fs10 fc0 sc0 ls0 ws0"><span class="fc1 sc0">Ｐ（￡）＝最（￡）ｃ。ｓ∞。￡＝（夕。ｃｏ蚴。￡＋Ｑ。ｓｉｎ缈∞＝÷Ｐ。＋÷疋ｅ。ｓ２棚。￡＋÷Ｑ。ｓｉｎ２∞。ｌ</span></div><div class="t m6 x7c h2 y61 ff1 fs0 fc0 sc0 ls0 ws0"><span class="fc1 sc0">（２）</span></div><div class="t m76 x7d h12 y62 ff1 fs10 fc0 sc0 ls0 ws0"><span class="fc1 sc0">Ｑ（ｆ）＝ｓ。（ｔ）ｓｉｎ∞。ｆ＝（以ｃ。ｓ∞。￡＋Ｑ。ｓｉｎ∞。￡）ｓｉｎ∞。￡＝吾Ｑ。一÷Ｑ。ｃ。ｓ２蛾￡＋扣扣ｎ２眦￡</span></div><div class="t m67 x7c h2 y63 ff1 fs0 fc0 sc0 ls0 ws0"><span class="fc1 sc0">（３）</span></div><div class="t m5 x5c h4 y64 ff1 fs2 fc0 sc0 ls0 ws0"><span class="fc1 sc0">２</span></div><div class="t m77 x7e h7 y65 ff1 fs5 fc0 sc0 ls0 ws0"><span class="fc1 sc0">ＭＱＡＭ系统仿真</span></div><div class="t m78 x7f h8 y66 ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">邀子ＱＡ鹾盼错误概率主要取决子信号点闻的最小鞭离，掰以震要了鳃信号点星座毽‘”。调制信号矢</span></div><div class="t m61 x78 h8 y67 ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">量端点在信号空间的坐标系中的分布图称为调制星座图，其中的信号矢量端点称为星象点．常规的信号星</span></div><div class="t m79 x78 h8 y68 ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">座图为矩形和十字型，本文以矩形星座图为例，进行仿真和分析㈦３１。如图３和图４所示，若ｎ为偶数，则星</span></div><div class="t m7a x78 h8 y69 ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">座圈楚歪方形，着建为毒数，裂星座龌为长方形＋星座匿上的每个点由横使纛霞交方向上的不同电平表示。</span></div><div class="t m7b x78 h8 y3f ff1 fs6 fc0 sc0 ls0 ws0"><span class="fc1 sc0">星座网越大，则每个符号代表的比特数越多‘１】【４１‘引，但是检测电平和相位也越困难．由圈５可知：要达到与</span></div><div class="t m6 x6f h7 y40 ff2 fs5 fc0 sc0 ls0 ws0"><span class="fc1 sc0">　</span><span class="_ _0"></span><span class="fc1 sc0">万方数据</span></div></div><div class="pi" data-data='{"ctm":[1.851296,0.000000,0.000000,1.851296,0.000000,0.000000]}'></div></div>