基于粒子群优化改进变步长LMS算法的数字基带传输系统  

A Digital Baseband Transmission System With Improved Variable-step-size LMS Algorithm Based on Particle Swarm Optimization

作　　者：冯艳艳 汤骁东 李彦 唐锟 石金晶[3] FENG Yanyan;TANG Xiaodong;LI Yan;TANG Kun;SHI Jinjing(College of Computer and Information Engineering,Central South University of Forestry and Technology,Changsha,410004,China;School of Electronic and Information Engineering,South China University of Technology,Guangzhou,510640,China;School of Electronic Information,Central South University,Changsha 410083,China)

机构地区：[1]中南林业科技大学计算机与信息工程学院,长沙410000 [2]华南理工大学电子与信息学院,广州510640 [3]中南大学电子信息学院,长沙410004

出　　处：《佳木斯大学学报（自然科学版）》2024年第11期1-5,共5页Journal of Jiamusi University：Natural Science Edition

基　　金：国家自然科学基金青年科学基金项目(62201620,62202505,62272483);湖南省自然科学基金青年基金项目(2023JJ41059,2022JJ40878);湖南省教育厅优秀青年项目(21B0228)

摘　　要：为了减小数字基带传输系统码间串扰,目前主要采用的是最小均方算法自适应滤波,然而由于滤波器阶数以及步长等参数需要根据经验或反复实验比较才可确定出最适合值,会存在系统仅仅在特定环境下才具有较好性能的情况。为此,通过将粒子群优化算法应用在改进变步长最小均方算法,提出了基于粒子群算法优化的改进变步长最小均方算法。基于此,设计了采用基于粒子群优化改进变步长最小均方算法的数字基带传输系统,其中算法能够根据具体情况进行自适应变化滤波器阶数以及步长,使得系统能够在任何噪声环境下均采用合适的滤波器阶数以及步长从而使误码率降低,获得更优越的性能及更广泛的适用环境。In order to reduce inter-symbol crosstalk in digital baseband transmission systems,the least mean square algorithm adaptive filtering is currently mainly used.However,since parameters such as filter order and step size need to be determined based on experience or repeated experiments,the most suitable values can be determined.There may be situations where a system only performs better under certain circumstances.To this end,this article first proposes an improved variable step least mean square algorithm based on particle swarm optimization by applying the particle swarm optimization algorithm to the improved variable step least mean square algorithm.Based on this,a digital baseband transmission system using an improved variable-step minimum mean square algorithm based on particle swarm optimization was designed.The algorithm can adaptively change the filter order and step size according to specific conditions,allowing the system to operate in any noisy environment.Appropriate filter orders and step sizes are used to reduce the bit error rate,obtain better performance and a wider range of applicable environments.

关 键 词：数字通信系统 数字基带传输系统 变步长最小均方算法 粒子群优化算法 误码率 

分 类 号：TN911.5[电子电信—通信与信息系统]