基于FPGA和符号L MS算法的自适应均衡器设计

摘要

To adaptively equalize the transmission channel of communication system,the adaptive equalizer based on field pro-grammable gate array (FPGA)was used in this system.Signum-LMS algorithm was proposed on the basis of standard least mean square (LMS)algorithm.It decreased the consumption of FPGA hardware resource by reducing the number of multiplica-tions in the adaptive equalization.MATLAB software simulation proved the feasibility and effectiveness of this scheme.Quartus II and ModelSim hardware simulations verified that the adaptive equalizer utilizing the signum-LMS algorithm had superiority in the consumption of FPGA hardware resource.%为了对通信系统的传输信道进行自适应均衡处理，在通信系统中加入了基于现场可编程门阵列（FPGA）的自适应均衡器。在标准最小均方（LMS）算法的基础上，提出了符号LMS算法。该算法通过降低自适应均衡过程中的乘法运算次数来减少该自适应均衡器所消耗的FPGA硬件资源。MATLAB软件仿真验证了该方案的可行性和有效性；Quartus II和ModelSim硬件仿真证实了采用符号LMS算法的自适应均衡器在FPGA资源消耗方面确实具有优势。