摘要
基于Cholesky分解,给出了用户幅度估计的迭代公式,从而获得用户功率排序.在解相关判决反馈检测器中,通过置换矩阵实现了用户判决次序按照功率递减顺序排列,使最强用户最先得到判决.性能分析表明,判决排序改善了检测器的误码性能.仿真结果与理论预测一致,判决排序均衡了系统的误码性能,使越弱信号用户的误码性能改善越大.
An iterative formula of the amplitude estimate is presented based on Cholesky decomposition for the signal power order. The decision arrangement in the order of decreasing amplitude is implemented by permutation matrix in decorrelating decision-feedback multiuser detector, it will make the strongest user get a very first decision. Performance analysis shows that the decision arrangement can improve the bit error rate （BER） performance of the detector. The simulation results accord with the-oretical prediction which summarizes that the decision arrangement will enhance the BER performance of the weaker user and equalize that of the whole system.
出处
《北京邮电大学学报》
EI
CAS
CSCD
北大核心
2008年第2期104-107,共4页
Journal of Beijing University of Posts and Telecommunications
基金
国家自然科学基金项目(60472097,60502045)
教育部新世纪优秀人才支持计划项目(NCET-04-0947)
关键词
幅度估计
解相关判决反馈检测器
判决排序
误码性能
amplitude estimate
decorrelating decision-feedback detector
decision arrangement
bit error rate
