部分并行软干扰消除迭代多用户检测算法研究

Iterative Multiuser Detection Algorithm Based on Interference Cancellation Partial Parallel Soft

本文提出了一种基于部分并行干扰消除(PPIC)结构的迭代多用户检测算法,并对基于PPIC的迭代多用户检测器的迭代结构进行了改进。由于PPIC多用户检测器前一级输出的信息的准确度会影响到后一级的检测,所以为了提高基于PPIC的迭代多用户检测器的性能,对PPIC每一级的输出信息结合最大后验概率(MAP)信道译码器单独进行迭代处理,这样就提高了PPIC每一级输出的信息的准确性。该迭代结构可用于其他基于PIC型的迭代多用户检测算法。

In this paper, an iterative multiuser detection algorithm based on partial parallel interference cancellation structure is proposed and an iterative structure based on PPIC multiuser detection is modified. The veracity of the output bit information in fore stage affects the detection in next stage in PPIC, so in order to improve the performance of iterative multiuser detection based on PPIC, the output bit information in each stage in PPIC is iteratively processed in combination with the MAP channel decoder, thus improving the veracity of the output bit information in each stage in PPIC. This iterative structure can also be applied in other iterative multiuser detection algorithm based on PIC.