一种部分自适应干扰抑制的判决反馈CDMA接收机

信号处理 Pub Date : 2001-08-06 DOI:10.1109/SSP.2001.955234

Gau-Joe Lin, Ta-Sung Lee, Chan-Choo Tan

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引用次数: 0

摘要

提出了一种具有自适应多址干扰和窄带干扰抑制功能的新型CDMA接收机，用于多径信道上的反向链路信号接收。接收机的设计包括以下步骤。首先，基于广义旁瓣抵消(GSC)方案构建自适应相关器，采集多径信号，抑制强干扰和时变干扰;特别是，部分自适应被纳入到GSC中，以降低处理的复杂性。一个简单的组合器与信道估计，然后给出符号的决定。为了提高自适应相关器的性能，引入了一种决策辅助方案，该方案从GSC的输入数据中减去重构信号，从而提高了输出信噪比和收敛性。通过仿真对所提出的CDMA接收机进行了评价，结果表明，该接收机的抗干扰性能优于传统的MMSE接收机。

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A decision feedback CDMA receiver with partially adaptive interference suppression

A novel CDMA receiver with adaptive multiple access interference (MAI) and narrowband interference (NBI) suppression is proposed for reverse link signal reception over multipath channels. The design of the receiver involves the following procedure. First, adaptive correlators are constructed based on the generalized sidelobe canceller (GSC) scheme to collect the multipath signals and suppress strong MAI and time-varying NBI. In particular, partial adaptivity is incorporated into the GSC for reduced complexity processing. A simple combiner with channel estimation then gives the symbol decisions. In order to enhance the performance of the adaptive correlators, a decision aided scheme is introduced which subtracts the reconstructed signal from the input data of the GSC, leading to improved output SINR and convergence. The proposed CDMA receiver is evaluated through simulations, and the results show that it can outperform the conventional MMSE receiver designed for time-invariant interference.

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来源期刊

信号处理

自引率

0.00%

发文量

5812

期刊介绍： Journal of Signal Processing is an academic journal supervised by China Association for Science and Technology and sponsored by China Institute of Electronics. The journal is an academic journal that reflects the latest research results and technological progress in the field of signal processing and related disciplines. It covers academic papers and review articles on new theories, new ideas, and new technologies in the field of signal processing. The journal aims to provide a platform for academic exchanges for scientific researchers and engineering and technical personnel engaged in basic research and applied research in signal processing, thereby promoting the development of information science and technology. At present, the journal has been included in the three major domestic core journal databases "China Science Citation Database (CSCD), China Science and Technology Core Journals (CSTPCD), Chinese Core Journals Overview" and Coaj. It is also included in many foreign databases such as Scopus, CSA, EBSCO host, INSPEC, JST, etc.