New variable step size adaptive least mean square algorithm and its digital signal processing
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摘要: 针对紫外光通信中传统自适应最小均方（LMS）算法存在的不足，提出了一种新的变步长LMS(VSS-LMS)算法，利用MATLAB仿真验证了该算法的可行性，以TMS320VC5509为核心设计了数字信号处理（DSP）最小化硬件系统和VSS-LMS算法的软件流程，在硬件上实现了传统LMS算法和新的VSS-LMS算法的自适应滤波，并进行了对比分析，结果表明所提出的VSS-LMS算法具有较快的收敛速度和较小的稳态误差，这对紫外光通信接收系统的设计和优化具有一定的参考意义。Abstract: A new variable step size least mean square (VSS-LMS) algorithm based on the characteristics and shortcomings of traditional adaptive LMS algorithm was proposed. Feasibility of the algorithm was conducted by MATLAB simulation. The minimized hardware system of digital signal processing (DSP) and the software flow chart of VSS-LMS algorithm were designed based on the core of TMS320VC5509, and self-adaptive filtering was achieved for the traditional LMS algorithm and new VSS-LMS algorithm in hardware. Comparative analysis results show that the proposed VSS-LMS algorithm has faster convergence speed and smaller steady state error, which has a certain reference significance for the design and optimization of UV communication receiver system.
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