【摘要】 码分多址系统是干扰受限的通信系统,存在多址接入干扰、码间干扰和远近效应.引入多用户联合检测器可以对抗上述干扰.将基于SNR的功率控制引入多用户检测器可以提高系统的性能,提出的盲自适应的闭环功率控制进一步改善了系统的误帧率性能和功率控制的错误率.更多还原

【Abstract】 The capacity of code division multiple access (CDMA) systems is limited by intersymbol interference, multipleaccess interference and nearfar effect as well. Joint detection (JD) technology is introduced into CDMA systems to combat them. However, the interference and the nearfar effect cannot be eliminated completely with low complexity suboptimum joint detection technologies; therefore, we investigate the combination of JD and closed loop power control (CLPC) algorithms. A blind adaptive CLPC algorithm is provided furthermore, to reduce block error rate of CDMA systems and the standard deviation of power control error.更多还原