Interference canceling equalizer (ICE) for mobile radio communications

Proceedings of ICC/SUPERCOMM'94 - 1994 International Conference on Communications Pub Date : 1994-05-01 DOI:10.1109/ICC.1994.368871

H. Yoshino, K. Fukawa, H. Suzuki

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引用次数: 45

Abstract

This paper proposes an adaptive interference canceling equalizer (ICE) that not only equalizes intersymbol interference (ISI), but also cancels co-channel interference (CCI) in the received signal in Rayleigh fading environments. ICE employs a novel detection scheme, the recursive least squares maximum likelihood sequence estimation (RLS-MLSE), which simultaneously estimates time varying channel parameters. Diversity reception is used to enhance the signal detection performance of ICE. A computer simulation of 40 kb/s QPSK mobile radio transmission demonstrates the possibility of system capacity improvement by ICE. Simulations of ICE with diversity are carried out under the conditions of a two-path Rayleigh frequency selective fading channel with 50 /spl mu/sec delay, 40 Hz maximum Doppler frequency, and 15 dB average E/sub b//N/sub 0/. ICE for single CCI cancellation attains an average BER of 10/sup -2/ under a carrier-to-interference ratio (CIR) of -14 dB. ICE with two independent CCI signals attains less than 1.5/spl times/10/sup -2/ average BER for average CIR/spl ges/-10 dB.<>

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用于移动无线电通信的干扰抵消均衡器

本文提出了一种自适应干扰抵消均衡器(ICE)，该均衡器不仅能平衡瑞利衰落环境下接收信号中的码间干扰(ISI)，还能消除同信道干扰(CCI)。ICE采用了一种新颖的检测方案——递推最小二乘最大似然序列估计(RLS-MLSE)，它可以同时估计时变信道参数。采用分集接收提高了ICE的信号检测性能。通过对40kb /s QPSK移动无线电传输的计算机仿真，验证了ICE提高系统容量的可能性。在双径瑞利频率选择性衰落信道条件下，采用50 /spl mu/s时延、40 Hz最大多普勒频率、15 dB平均E/sub / b//N/sub / 0/进行了ICE分集仿真。在载波干扰比(CIR)为-14 dB时，单CCI抵消的ICE平均误码率为10/sup -2/。具有两个独立CCI信号的ICE在平均CIR/spl ges/- 10db时的平均误码率小于1.5/spl倍/10/sup -2/。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Proceedings of ICC/SUPERCOMM'94 - 1994 International Conference on Communications

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