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.