一种基于约束最小误码率的多用户检测算法

A new constrained minimum-BER multiuser detection algorithm

针对多用户检测器误码率函数具有多个局部极小点的缺陷,本文提出一组新的约束条件,在约束的检测器解空间里,误码率函数具有唯一的最小点。同时,本文还提出了一种有效的阻碍共轭梯度算法来求解约束最小点。仿真结果表明,本文的提出的约束最小误码率检测器性能接近理想的线性最小误码率检测器,明显优于最小均方误差检测器。

Based on the previously proposed error probability function, a new set of constraints is proposed .We show that under these new constraints uniqueness of global minimum can be guaranteed .An efficient barrier conjugate gradient algorithm is developed to solve this optimization problem.Computer simulation results show that the proposed detector achieves similar performance to the optimal linear detector and significantly outperforms the MMSAE detector.