Cochannel interference suppression through time/space diversity

被引:8
作者
Calderbank, AR [1 ]
Pottie, G
Seshadri, N
机构
[1] AT&T Labs Res, Informat Sci Res, Florham Park, NJ 07932 USA
[2] Univ Calif Los Angeles, Dept Elect Engn, Los Angeles, CA 90095 USA
关键词
concatenated codes; decoders for non-Gaussian noise; interference cancellation; signal processing; smart antennas; wireless communication;
D O I
10.1109/18.841171
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 [计算机科学与技术];
摘要
Wireless systems are subject to a time-varying and unknown a priori combination of cochannel interference, fading, and Gaussian noise. It is well known that multiple antennas can provide diversity in space that allows system tradeoffs between interference suppression and mitigation of fading, This paper describes how to achieve these same tradeoffs through diversity in time provided by channel coding, The mathematical description of time diversity. is identical to that of space diversity, and what emerges is a unified framework for signal processing. Decoding algorithms are provided for repetition codes, rate 1/n convolutional codes, first-order Reed-Muller codes, and a new class of Linear combination codes that provide cochannel interference suppression. In all cases it is possible to trade performance for complexity by choosing between joint estimation and a novel low-complexity linear canceler structure that treats interference as noise, This means that a single code can he used in a variety of system environments just by changing the processing in the receiver.
引用
收藏
页码:922 / 932
页数:11
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