Interference cancelling equalizer (ICE) for mobile radio communication
Interference cancelling equalizer (ICE) for mobile radio communication
复制标题
用于移动无线电通信的干扰消除均衡器 (ICE)
DOI：
10.1109/25.653059
复制
发表时间：
1997
影响因子：
6.8
通讯作者：
H. Sukuki
中科院分区：
文献类型：
--
作者：
H. Yoshino;K. Fukawa;H. Sukuki
本文提出了一种自适应干扰消除均衡器（ICE），它不仅可以均衡码间干扰（ISI），还可以消除瑞利衰落环境中接收信号中的同信道干扰（CCI），ICE是一种针对移动通信信道常见的频率选择性衰落环境的自适应多用户检测器。 ICE 采用了一种新颖的检测方案：递归最小二乘最大似然序列估计 (RLS-MLSE)，它同时估计时变信道参数和传输信号序列。分集接收用于增强ICE的信号检测性能。 40 kb/s QPSK 时分多址 (TDMA) 蜂窝移动无线电系统的计算机模拟证明了使用 ICE 提高系统容量的可能性。在各种衰落条件下对有分集和无分集的 ICE 进行了仿真。对于 40 Hz 的最大多普勒频率，ICE 在 /spl sim/14 dB 的单个 CCI 载波干扰比 (CIR) 下可以获得 10/sup -2/ 的平均误码率 (BER)。此外，两个独立CCI信号的ICE可以达到1.5/spl times/10/sup -2/的平均BER，平均CIR/spl ges/-10 dB。
This paper proposes an adaptive interference cancelling equalizer (ICE), which not only equalizes intersymbol interference (ISI), but also cancels cochannel interference (CCI) in the received signal in Rayleigh-fading environments, ICE is an adaptive multiuser detector for the frequency-selective fading environment commonly experienced by mobile communication channels. ICE employs a novel detection scheme: recursive least-squares maximum-likelihood sequence estimation (RLS-MLSE), which simultaneously estimates time-varying channel parameters and transmitted signal sequences. Diversity reception is used to enhance the signal detection performance of ICE. A computer simulation of a 40-kb/s QPSK time-division multiple-access (TDMA) cellular mobile radio system demonstrates the possibility of improving system capacity with ICE. Simulations of ICE with and without diversity are carried out under various fading conditions. For the maximum Doppler frequency of 40 Hz, ICE can attain an average bit-error rate (BER) of 10/sup -2/ under a single CCI carrier-to-interference ratio (CIR) of /spl sim/14 dB. Moreover, ICE for two independent CCI signals can attain the average BER of 1.5/spl times/10/sup -2/ with average CIR/spl ges/-10 dB.