基于软干扰消除的TH-UWB迭代多用户检测算法

The TH-UWB system iterative multi-user detection based on interference cancellation

多址干扰已经成为影响UWB系统性能的重要因素,将Turbo理论中的迭代思想与多用户检测技术相结合,提出了一种基于软干扰抵消的迭代多用户检测算法,为进一步降低算法复杂度,对软干扰抵消后的剩余干扰进行高斯近似。仿真实验表明,在AWGN信道条件下,经过几次迭代后多址干扰被有效抑制,使用该算法的接收机性能明显优于传统接收机。

Multiple access interference has a significant impact on the performance of UWB communication systems. To investigate the problem, the iterative ideological in turbo principle is brought into the multi-user detection, and an iterative multi-user detection algorithm based on soft interference cancellation is proposed. In order to further reduce the algorithm complexity, Gaussian approximation is adopted for the residual interference. The performance of the low-complexity implementation has been tested in AWGN channel though simulations. The simulation results show that multiple access interference is efficiently suppressed after several iterations, and the performance of the receiver using the algorithm is obviously better than the traditional receiver.