实际室内信道DS-CDMA UWB系统盲多用户检测技术研究

Research of blind multiuser detection for DS-CDMA ultra wideband in a realistic indoor channel

提出一种基于常模算法(CMA)的实际室内信道下DS-CDMA UWB系统盲多用户检测方法.该算法采用两步接收方法,第一步,通过分析期望用户特征码具有特殊的结构,压制部分ISI和MAI;第二步在CMA的基础上,消除残留的MAI和ISI,期望用户的信息码元可靠的恢复.计算机仿真显示在考虑远近效应的情况下该算法具有很好的性能.

Gonstant-modulus algorithm （CMA） based blind multiuser receiver is proposed for multiuser detection of DS-CDMA UWB systems in a realistic indoor channel. we propose to adopt a two stage receiver, in the first stage, partial ISI and MAI suppression is achieved by exploiting the desired user signature structure properties; in the second stage, based on CMA, the residual MAI and the ISI are removed, and the desired symbols are reliably recovered. Computer simulations show that, the proposed detector achieves good performances in serve near-far condition.