摘要
该文分析了MC—CDMA系统采用解相关-并行干扰抵消(DEC—PIC)多用户检测器的性能,把它与Hara提出的最小均方误差合并(MMSEC)单用户检测器在上行和下行信道加以比较.仿真结果显示下行信道应用MMSEC单用户检测性能较好,且能抵抗信道估计错误。而上行信道多用户检测器的性能也较好,但是多用户检测器会受较大的信道估计错误影响而性能降低.
This paper analyzes the performance of DEC- Parallel Interference Canceling(DEC-PIC) multiuser detector exploited in MC-CDMA system. It is compared with Hara's Minimum Mean Square Error Combining(MMSEC) single-user detector in the uplink and downlink channels. The simulation results show that MMSEC single user detector is better in the downlink, and it can resist the channel estimation error. And in the uplink, the performance of the multiuser detector is better, but the large channel estimation error will bring performance degradation.
出处
《电子与信息学报》
EI
CSCD
北大核心
2004年第4期517-524,共8页
Journal of Electronics & Information Technology
基金
国家863计划(2001AA123031)
高等学校优秀青年教师教学科研奖励计划
国家自然科学基金(60372048)资助课题
