一种等效的变步长盲多用户检测算法

An equivalent blind multi-user detector algorithm with a variable step-size

为提高判决反馈Sato盲多用户检测器和最小输出能量MOE盲检测器的性能,通过控制Sato算法的反馈系数,提出了一种新的盲多用户检测算法.该检测器等价为一种判决反馈变步长MOE盲检测器,既保持了MOE检测器全局收敛性,又具有最小均方误差MMSE检测器高输出信干比的优点.计算机仿真结果表明该算法的收敛性能和误码性能均优于MOE和Sato检测器.

A blind multiuser detector is proposed to improve the performance of the decided feedback Sato detector and the Minimum Output Energy (MOE) detector, whose feedback coefficient is controlled. The detector is a MOE detector with a variable step size essentially, which achieves the superior convergence performance of the MOE blind detector and the high output signalinterference rate (SIR) of the Minimum Mean Square Error(MMSE) detector. Computer simulation results show that the convergence performance and symbol error performance of the new algorithm are better than those of the MOE detector and the Sato detector.