LDPC编码超宽带系统的迭代多用户检测算法

Iterative multiuser detection for LDPC coded UWB systems

针对传统超宽带系统多用户检测算法复杂度过高问题,提出一种低复杂度的LDPC编码超宽带系统的迭代多用户检测算法。所提出的算法将Turbo迭代思想应用于LDPC编码超宽带系统的多用户检测中,并且采用软干扰抵消和最小均方误差滤波方法来简化接收机的复杂度。仿真结果证明,使用该算法接收机的性能显著优于传统接收机,经过少数次迭代后多址干扰被有效地抑制,达到接近单用户的性能。

A low-complexity multiuser detection algorithm for Low Density Parity Check（LDPC） coded Ultra-Wideband（UWB） systems is proposed.The algorithm applies the Turbo iterative method for multiuser detection.It combines soft interference cancellation and Minimum Mean-Squared Error（MMSE） filter to significantly decreases the complexity of the receiver.Simulation results show that the proposed system outperforms conventional systems.With a few iterations the proposed system can effectively restrain multi-address interference and its performance is close to that of a single-user system.