【摘要】 本文提出了MC-CDMA系统中一种预处理线性受限最小二乘恒模多用户检测算法(Pre-processed Linearly Con- strained Least Squares Constant Modulus Multi-user detection Algorithm),称为P-LCLSCMA。它是对MC-CDMA接收信号进行预处理,即在每次迭代中,用已估信道参数先消除信道在各个子载波上对期望用户信号的影响,然后对处理后的信号用P- LCLSCMA算法进行多用户检测,从而确保了算法收敛于期望信号,提高了系统的检测性能。我们对这种新算法分别在下行链路和上行链路进行了仿真,仿真结果表明,本文提出的P-LCLSCMA算法的误码率和信干比性能得到了提高。更多还原

【Abstract】 A pre-processed linearly constrained least squares constant modulus multi-user detection algorithm(P-LCLSCMA)in MC-CDMA system is proposed in this paper.First the received signal is pre-processed,in other words,the estimated channel parameters are used to eliminate the influence of the channel to the expected signal in every carrier,then the P-LCLSCMA is applied to the pre-pro- cessed signal.This ensures the algorithm converge to the expected signal and enhances the performance of the detector.The new algo- rithm is simulated in downlink and uplink separately.Simulation results show that the proposed algorithm in this paper can enhance the performance of BER and SINR.更多还原