摘要
直接序列扩频码分多址系统中,多址干扰极大的影响了系统的误码率性能;并行干扰消除算法能有效的改善多用户条件下直接序列扩频码分多址系统的性能,但干扰消除的性能受干扰信号估计的偏差影响;传统的时延控制方案无法实现小于系统时钟周期的精确时延控制,把拉格朗日插值算法引入干扰消除算法中,实现了对估计的干扰信号的精确时延控制,仿真结果表明:改进的并行干扰消除方案能有效提高干扰消除的性能。
In a DS-CDMA communication system,the performance of bit error rate is restricted by multipleaccess interference（ MAI）. The Parallel interference cancellation algorithm can improve the performance of a CDMA system; However the performance of interference cancellation is easy to suffer from the bias of the multiple-access interference signal estimation. The traditional delay control scheme cannot realize the accurate delay control which is smaller than the system clock period,this paper introduces the Lagrange interpolation Algorithm to the interference cancellation algorithm,and the precise time delay control of the estimation of the multiple-access interference is realized. Simulation result shows that the improved Parallel interference cancellation scheme can effectively improve the performance of interference cancellation.
作者
刘松柏
LIU Songbai(The No. 10^th Research Institute of China Electronic Technology Group Corporation, Chendu 610036, China)
出处
《兵器装备工程学报》
CAS
北大核心
2018年第6期171-173,共3页
Journal of Ordnance Equipment Engineering
关键词
码分多址干扰
误码率
并行干扰消除
拉格朗日插值
multiple-access interference
bit error rate
parallel interference cancellation
lagrange interpolation
