基于DSP Builder的回波抵消器设计与实现

Design and implementation of adaptive echo cancellation based on DSP builder

摘要:

针对通信中的回波问题，基于自适应滤波的最小均方(LMS)算法，设计了一个自适应回波抵消器。基于FPGA芯片，在DSP Builder平台上，有效结合MATLAB/Simulink和Quartus II设计工具，根据模块化设计思想实现了LMS算法自适应回波抵消器硬件电路设计。软件仿真和系统FPGA硬件实测结果表明，该设计方法使回波抵消器的FPGA硬件实现更加简便快捷。

Abstract:

Aiming at the echo problem in communication, this study designed an adaptive echo cancellation with the algorithm of Least Mean Square(LMS). By using of DSP Builder Tool combining Matlab/Simulink and Quartus II design tools, the hardware circuit of this canceller was implemented in FPGA chips with the concepts of modularization. Software simulation of modules was conducted and hardware verification of the whole system was completed. The results proved the correctness of the design. This design makes the implementation of the adaptive echo canceller simpler and faster.