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中文摘要：
目的解决超宽带系统中的多址干扰和码间干扰问题。方法首先使用约束恒模算法对接收信号进行盲解相关，消除多址干扰，再进一步采用紧缩近似投影子空间跟踪方法估计信道并进行最大比合并，提高输出信干噪比。结果该接收机的误码性能和抗“远一近”效应能力均优于匹配滤波器和传统rake接收机，且所需先验知识较少、收敛速度较快。结论该接收机具有较低的复杂度，适用于室内超宽带系统的多用户、高速率接人场合。
英文摘要：
Aim To suppress both inter symbol interference （ISI） and multiple access interference （MAI） in ultra-wideband （UWB） systems. Methods The constraint constant modulus algorithm （CCMA） is firstly adopted to eliminate MAI, and then the PASTd method is used to estimate channel and combine the components of muhi-path. Results The proposed receiver exhibits reasonably good performance and near-far resistance compared with the matched filter and conventional rake receiver. Besides, it can converge at the steady state rapidly. Conclusion The advantage of the proposed receiver is of low complexity, thus it suits for the high speed muhi-user UWB access in indoor environment.
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