基于自由搜索的多用户检测

Multiuser Detector Based On an improved free search algorithm

自由搜索(FS)算法是一种新的群集智能优化算法,该算法与同类算法相比,全局搜索能力好、收敛速度快,把它应用到CDMA通信系统中抗干扰的关键技术-多用户检测(MUD)中,提出了基于自由搜索算法的多用户检测器(FS_MUD),并将其和基于群集智能典型算法粒子群算法的多用户检测器(PSO_MUD)做比较,仿真结果表明,该FS_MUD在误码率性能、抗远近效应和增加系统容量方面的性能较之PSO_MUD均有明显的提高。

Free search（FS） is a novel swarm intelligence algorithm.Compared with similar algorithms such as Particle Swarm Optimization（PSO）,FS has better performance such as avoiding local optima and quick convergence.Apply the FS to the key technique for Code-Division Multiple-Access（CDMA） mobile system which called The Multi-user Detection（MUD）,The experimental results indicate that the performance of FS_MUD is more efficient in the BER capability,the near-far resistance and enlarging the system capacity than PSO_MUD.