基于自适应信道均衡的CDMA下行干扰抑制

Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324) Pub Date : 1999-09-19 DOI:10.1109/VETECF.1999.798476

M. Heikkila, P. Komulainen, J. Lilleberg

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引用次数: 59

摘要

在采用正交扩频码的同步CDMA下行链路中，多径信道是造成多址干扰的主要原因。这就是为什么可以通过通道均衡来抑制MAI。本文提出了一种通过估计发送的芯片序列来实现自适应信道均衡的接收算法。自适应采用Griffiths算法，并收敛到LMMSE解。该接收器适用于使用长码扰的系统，例如3/sup / generation宽带CDMA提案，并且与传统的RAKE接收器相比，它显示出显着的性能提升。

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Interference suppression in CDMA downlink through adaptive channel equalization

In the synchronous CDMA downlink using orthogonal spreading codes, the multiple access interference (MAI) is essentially caused by the multipath channel. This is why the MAI can be suppressed by channel equalization. In this paper we present a receiver algorithm which performs adaptive channel equalization by estimating the transmitted chip sequence. The adaptation uses Griffiths' algorithm and converges to the LMMSE solution. The receiver is applicable in systems using long code scrambling such as in the 3/sup rd/ generation wideband CDMA proposals, and it is shown to offer significant performance gains when compared to conventional RAKE receivers.

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来源期刊

Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324)

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