CDMA2000下行接收技术研究--一种改进的带自适应存储的RLS算法

在下行链路中,接收机必须克服多径衰落等信道环境的负面影响,同时收端只想解调所期望用户的信号,抑制由其他用户引起的干扰,此外接收机也需要较低的运算量.本文对Rake接收和两种次优线性多用户检测（DD和MMSE）算法进行了研究和性能比较.在综合考虑了各种接收算法优缺点的基础上提出了一种改进的带自适应存储的RLS多用户接收算法,并对这种算法做了分析和性能仿真.仿真结果表明在相同指标和减少运算量的情况下,该算法可以得到比次优MMSE算法近2 dB左右的增益,系统的性能得到了提高.

Research of CDMA2000 Downlink Receiver Technology of an Improved RLS Algorithm with Adaptive Memory

Receiver ought to overcome multipath fading in downlink, at the same time,it should decode the needed signal and overcome interference from other users. On the other hand, the low computation is needed. This thesis makes the research and comparison to Rake receiver and algorithms of linear decorrelation multiusers detection and linear minimum means square error multiusers detection. Through comparing performances of different receiving algorithms, a new improved adaptive multiusers algorithm RLS with adaptive memory is put forward and analyzed. Simulation results show the RLS algorithm with adaptive memory can improve close 2 dB than MMSE algorithm in the same condition and less computations by simulations and the performance is improved.