摘要
采用码片速率采样建立了MC-CDMA系统的信号模型,研究了多径环境下基于子空间投影的MC-CDMA系统的盲多用户检测技术和迭代算法,并对多用户检测的输出采用最大比合并。仿真结果表明,检测器具有较强的抑制多址干扰和抗多径衰落的能力,并且能快速收敛。
A signal model of MC-CDMA systems by sampling chip-rate is constructed. With this model, the blind muitiuser detection and iterative algorithm of MC-CDMA systems based on subspace projection are studied in the multipath fading channel. And the output of multi-user detection is combined by maximum ratio. The results of numerical simulation and performance analysis show that the detector has the favorable performance of eliminating MAI and multipath fading resistance. Besides, it can converge rapidly.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2009年第5期1040-1042,共3页
Systems Engineering and Electronics
基金
国家高技术研究发展计划"863"项目资助课题(2006AA706132)
关键词
MC-CDMA
子空间投影
盲多用户检测
最大比合并
多址干扰
多径衰落
MC-CDMA
subspace projection
blind multiuser detection
maximum ratio combining
multiple access interference multipath fading channel
