文件列表:

pc_cfr_test_v3_1c.m (10178, 2007-11-28)
testcase1.mat (1993088, 2007-09-18)
pc_cfr_virtex4_v1_1_cw_bd.bmm (1098, 2007-10-17)
pc_cfr_virtex4_v1_1_cw.bit (1712616, 2007-10-17)
pc_cfr_virtex4_v1_1.mdl (1697702, 2007-10-17)
pc_cfr_virtex5_v1_1.mdl (1748754, 2007-10-17)
pc_cfr_virtex5_v1_1_cw_bd.bmm (1137, 2007-10-17)
pc_cfr_virtex5_v1_1_cw.bit (2502498, 2007-10-17)
pc_cfr_virtex5_v1_1_hwl.mdl (90401, 2007-10-19)
pc_cfr_virtex4_v1_1_hwl.mdl (90197, 2007-10-19)
ccdf.p (2603, 2007-10-19)
cfr_iteration_v42.p (7036, 2007-10-19)
cordic_abs_sin_cos.p (6061, 2007-10-19)
dec2tce.p (1098, 2007-10-19)
sigprops.p (4615, 2007-10-19)
simple_abs.p (385, 2007-10-19)
tc_round.p (1195, 2007-10-19)
tce2dec.p (1278, 2007-10-19)
check_pc_cfr_v1.m (3588, 2007-11-28)

******************************************************************************* ** 2007 Xilinx, Inc. All Rights Reserved. ** Confidential and proprietary information of Xilinx, Inc. ******************************************************************************* ** ____ ____ ** / /\/ / ** /___/ \ / Vendor: Xilinx ** \ \ \/ Version: 1.0 ** \ \ Filename: readme_xapp1033.txt ** / / Date Last Modified: Wed Nov 28, 2007 ** /___/ /\ Date Created: Wed Nov 28, 2007 ** \ \ / \ ** \___\/\___\ ** **Devices: Virtex-4, Virtex-5 **Purpose: ** Provide designers with a highly optimized solution for Crest Factor ** Reduction (CFR) that can be adapted to meet the needs of multiple ** air interfaces with minimum effort. **Reference: ** XAPP1033: Peak Cancellation Crest Factor Reduction Reference Design **Revision History: ** 1.0: Initial Xilinx release. ******************************************************************************* ** ** Disclaimer: ** ** Xilinx licenses this Design to you AS-IS with no warranty of any kind. ** Xilinx does not warrant that the functions contained in the Design will ** meet your requirements, that the Design will operate uninterrupted or be ** error-free, or that errors or bugs in the Design will be corrected. ** Xilinx makes no warranties or representations in regard to the results ** obtained from your use of the Design with respect to accuracy, ** reliability, or otherwise. ** ** XILINX MAKES NO REPRESENTATIONS OR WARRANTIES, WHETHER EXPRESS OR IMPLIED, ** STATUTORY OR OTHERWISE, INCLUDING, WITHOUT LIMITATION, IMPLIED WARRANTIES ** OF MERCHANTABILITY, NONINFRINGEMENT, OR FITNESS FOR A PARTICULAR PURPOSE. ** IN NO EVENT WILL XILINX BE LIABLE FOR ANY LOSS OF DATA, LOST PROFITS, OR ** FOR ANY SPECIAL, INCIDENTAL, CONSEQUENTIAL, OR INDIRECT DAMAGES ARISING ** FROM YOUR USE OF THIS DESIGN. ******************************************************************************* This readme file describes how to use the files that come with XAPP1033. ******************************************************************************* Description of each file: 1. pc_cfr_virtex4_v1_1.mdl: System Generator design file for the Virtex-4 version of the PC-CFR reference design. 2. pc_cfr_virtex4_v1_1_hwl.mdl: Hardware in the loop version of pc_cfr_virtex4_v1_1. 3. pc_cfr_virtex5_v1_1.mdl: System Generator design file for the Virtex-5 version of the PC-CFR reference design. 4. pc_cfr_virtex5_v1_1_hwl.mdl: Hardware in the loop version of pc_cfr_virtex5_v1_1. 5. pc_cfr_virtex4_v1_1_cw.bit: Bit stream for hardware in the loop that targets the ML402 board with Ethernet point-to-point cosimulation. 6. pc_cfr_virtex5_v1_1_cw.bit: Bit stream for hardware in the loop that targets the ML506 board with Ethernet point-to-point cosimulation. 7. pc_cfr_virtex4_v1_1_cw_bd.bmm: Block memory map file needed for Ethernet cosimulation. 8. pc_cfr_virtex5_v1_1_cw_bd.bmm: Block memory map file needed for Ethernet cosimulation. 9. testcase1.mat: Test stimulus for CFR input data and cancellation pulse coefficients corresponding to the six nonadjacent carriers case. 10. check_pc_cfr_v1.m: MATLAB script that compares the behavior of the System Generator design to a bit-true model. 11. pc_cfr_test_v3_1c.m: MATLAB main program that is used to evaluate the performance of the PC-CFR algorithm. Includes behavioral code for the generation of baseband test data, pulse shaping and digital up conversion. Generates dPAPR, EVM, and ACLR metrics. Generates CCDF and PSD plots of CFR input and output. 12. ccdf.p: Function that generates CCDF plot and returns PAPR at 0.01% probability of clip point. 13. cfr_iteration_v42.p: Function that models a single iteration of the PC-CFR design. 14. cordic_abs_sin_cos.p: Function that moxdels the cordic_mag_sin_cos design module. 15. dec2tce.p: Function that converts from two's-complement signed format to unsigned format. 16. sigprops.p: Function that prints dBFS, PAPR, and max absolute value of real and imaginary signal components. 17. simple_abs.p: Function that computes a hardware efficient approximation of absolute value using a one's complement method. 18. tc_round.p: Function that performs a simple round. 19. tce2dec.p: Function that converts from unsigned format to two'scomplement signed format. ******************************************************************************* ******************************************************************************* The procedure for simulating the reference design is as follows: 1. Open the System Generator design file in Matlab. a. pc_cfr_virtex4_v1_1.mdl for the Virtex-4 version b. pc_cfr_virtex4_v1_1_hwl.mdl for the ML402 hardware co-sim version c. pc_cfr_virtex5_v1_1.mdl for the Virtex-5 version d. pc_cfr_virtex5_v1_1_hwl.mdl for the ML506 hardware co-sim version 2. Load the example stimulus file testcase1.mat into the Matlab workspace. After loading the example stimulus file there will be two variables used by the design: cfr_in and coefficients. The cfr_in variable is the CFR input stimulus data and the coefficients variable contains the cancellation pulse coefficients. 3. Hit the "Start Simulation" button located on the top of the Simulink window containing the reference design. 4. After the simulation has completed, run the check_pc_cfr_v1 script from the Matlab prompt. This script compares the output of the System Generator design to a bit-true behavioral model. The result from running this script should be a message indicating that the check passed along with some statistics on the maximum peak delay found per iteration. For example, the following results are obtained when using the above procedure and after running for a simulation time of 2e5: >> check_pc_cfr_v1 Maximum Peak Delay: 4 (i=10428) Maximum Peak Delay: 4 (i=44382) Check Passed! >> ******************************************************************************* ******************************************************************************* Additional Information: Different stimulus and coefficient data can be generated using the Matlab program pc_cfr_test_v3_1c.m. This program contains behavioral code that generates the CFR input data based on a user specified carrier configuration. It also generates the cancellation pulse coefficients for a user specified number of taps. Furthermore, it provides a means to experiment with different CFR model settings such as number of CPGs per iteration, number of iterations, and PAPR targets. Finally, the program generates performance metrics such as dPAPR, EVM, and ACLR along with plots of CCDF and PSD for the CFR input and output. After running this program, the user may save the cfr_in and coefficients variables into their own testcase.mat file to use as stimulus for the System Generator design. It is important to note that the reference design hardware contains four CPGs per iteration and two iterations. Therefore, changing these parameters in the Matlab program will result in behavior that is different than what is produced by the System Generator design. Furthermore, the threshold value produced from changing the PAPR_target parameter must be used to drive the threshold port of the System Generator design. Finally, the filter_numtaps and filter_ram_we ports must be driven by stimulus consistent with the cfr_ntaps variable in the Matlab program. The files with a ".p" extension are functions that are in the Matlab pre-parsed, pseudo-code file format (P-file). They are provided solely as support functions that are required by the pc_cfr_test_v3_1c.m and check_pc_cfr_v1.m main programs. *******************************************************************************

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