激光杂志
激光雜誌
격광잡지
LASER JOURNAL
2014年
4期
35-37
,共3页
王振朝%包伟华%李会雅%杨建坡
王振朝%包偉華%李會雅%楊建坡
왕진조%포위화%리회아%양건파
附加信号%回波抵消%迭代误差%主径时延%FPGA实现
附加信號%迴波牴消%迭代誤差%主徑時延%FPGA實現
부가신호%회파저소%질대오차%주경시연%FPGA실현
Additional Signal%Echo Cancellation%Iteration Error%Main Path Delay%FPGA Implementation
针对基于附加信号回波抵消在硬件设计中出现的迭代误差累积导致信道估计不准确和耗费大量FPGA资源的问题，对算法进行了改进。从主径开始估计回波信道的方法，提高了信道估计精度和减少了FPGA资源消耗。然后，在FPGA平台上用硬件语言Verilog HDL对此回波抵消系统加以实现。仿真结果表明此设计在回波抵消方面具有良好的效果。
針對基于附加信號迴波牴消在硬件設計中齣現的迭代誤差纍積導緻信道估計不準確和耗費大量FPGA資源的問題，對算法進行瞭改進。從主徑開始估計迴波信道的方法，提高瞭信道估計精度和減少瞭FPGA資源消耗。然後，在FPGA平檯上用硬件語言Verilog HDL對此迴波牴消繫統加以實現。倣真結果錶明此設計在迴波牴消方麵具有良好的效果。
침대기우부가신호회파저소재경건설계중출현적질대오차루적도치신도고계불준학화모비대량FPGA자원적문제，대산법진행료개진。종주경개시고계회파신도적방법，제고료신도고계정도화감소료FPGA자원소모。연후，재FPGA평태상용경건어언Verilog HDL대차회파저소계통가이실현。방진결과표명차설계재회파저소방면구유량호적효과。
For the problem that iteration error accumulation which leads to channel estimation inaccurate and consumes a lot of FPGA resources occurs in the hardware design of echo cancellation based on additional signal, it improved the algorithm. The method of estimating echo channel from the main path has improved the accuracy of channel estimation and reduced the FPGA resource con-sumption. Then it achieved the echo cancellation system using Verilog HDL language on FPGA. Simulation results show that the de-sign has better effect of echo cancellation.
