基于Walsh序列的LBER多用户检测算法的研究及推广

Least bit error multi-user detection based on walsh spreading sequences and its extension

在多径信道环境下,对下行链路的最低误比特率(MBER)多用户检测算法的性能进行了研究,并通过核密度函数估计方法将其推广到自适应的最小误比特率(LBER)多用户检测算法.计算机仿真结果表明:在一定条件下,该算法具有比MMSE算法有更好的误比特率性能(可以达到10-6以下);该算法模型的扩频序列可以由Walsh序列推广到PN序列.

In CDMA downlink systems,a novel minimum bit error rate(MBER) multi-user detection algorithm under multi-path channel is investigated,this can be extended to adaptive least bit error(LBER) algorithm based on the kernel density function estimate. Computer simulation results show that: under certain situations,the LBER algorithm is outperforms MMSE algorithm in BER(bit error rate) performance(≤10^(-6)),and under this algorithm model,Walsh sequences can be substitute by PN sequences.