克隆选择算法在多用户信号检测中的应用  

The Application of Clonal Selection Algorithm for Multiuser Detection in DS-CDMA System

作　　者：张锐[1] 张礼勇[1] 高辉[2] 

机构地区：[1]哈尔滨理工大学测控技术与通信工程学院,黑龙江哈尔滨150080 [2]哈尔滨工业大学交通科学与工程学院,黑龙江哈尔滨150090

出　　处：《测试技术学报》2005年第1期86-90,共5页Journal of Test and Measurement Technology

摘　　要：　为了减少计算复杂度,改善CDMA(CodeDivisionMultipleAccess)系统性能,将具有解决复杂组合优化问题能力的克隆选择算法(CLONALG)应用于码分多址系统多用户信号检测中,确定每一个用户传输的符号位.仿真结果表明,基于克隆选择算法的多用户检测器不仅具有克服多址干扰,抗'远-近效应'的能力,而且通过调整算法参数可以在检测时间和系统平均误码性能间进行均衡,与最佳多用户检测器相比明显地降低了计算复杂度.In order to reduce the computational complexity and improve the performance of the CDMA system, Clonal selection algorithm (CLONALG), which has the ability of solution to complex combinatorial optimization problem is applied to multiuser detection of CDMA system over fading channel. Employing CLONALG to determine each user symbol bit transmitted simultaneously. Simulation results show that the detector based on CLONALG not only has the performance of combating multiple access interference and near-far resistance but also offers a trade-off between an optimum BER performance and the computational complexity, the detection time by adjusting the parameter of algorithm. Comparing with optimum multiuser detector, its computational complexity can be obviously reduced.

关 键 词：多用户信号检测 克隆选择算法 应用 Multiple 多用户检测器 计算复杂度 码分多址系统 组合优化问题 仿真结果 系统性能 多址干扰 误码性能 检测时间 算法参数 能力 传输 

分 类 号：TN914.5[电子电信—通信与信息系统] TP311.13[电子电信—信息与通信工程]