A Low-density Parity-check Codes LDPC based Hybrid Multiuser Detection Method for DS-UWB System

摘要

With the development of ultra wideband (UWB) technologies, the multiple access UWB system has been a hot research topic. In this article, an efficient multiuser detector based on Low-Density Parity-Check Codes (LDPC) codes is proposed for direct-sequence ultra-wideband systems in Inter-satellite communication. To implement the hybrid receiver, code mapping and K-means clustering proposed by the author to further eliminate the multiuser interference and provide better detection performance. LDPC codes can achieve performance approaching the Shannon limit when decoded using an iterative probabilistic algorithm. In addition to their simple descriptions of code structure and fully parallelizable decoding implementations, such codes have attracted much attention particularly in the field of coding theory. Simulation results show the proposed new hybrid multiuser receiver possesses better detection performance.