一种新的混合多径干扰抵消方法

A New Hybrid Multipath Interference Canceller

在CDMA上行链路中,由于信号的异步传输和多径传播,会引起多址干扰和多径干扰,使得传统的RAKE接收机性能变差.并行干扰抵消和串行干扰抵消可在一定程度上抑止干扰,但并行干扰抵消抗远近效应能力较差,串行干扰抵消会引入较大的处理延时.提出了一种新的混合干扰抵消接收机结构,具有低复杂度,低延时,抗远近效应等优点,可以有效克服多址干扰和多径干扰,性能明显优于上述两种干扰抵消方法.

CDMA uplink system suffers from multi access interference （MAI） and multipath interference （MPI）. Therefore the conventional RAKE receivers will not be able to achieve sustainable performance. Parallel interference cancellation （PIC） and successive interference cancellation （SIC） are two schemes to suppress the interference. However PIC is sensitive to near-far effect while SIC will incur long bit delays. A new receiver structure named FHIC is proposed, which has advantages such as low complexity, shorter bit delays, high performance, and robustness to near-far effect as well. Simulation results show that the proposed receiver outperforms PIC and SIC significantly.