Reduced-complexity iterative equalization for severe time-dispersive MIMO channels

被引：4
|
作者：
Ahmed, Sajid [1 ]
Ratnarajah, T. [1 ]
Sellathurai, Mathim [1 ]
Cowan, Colin F. N. [1 ]
机构：
[1] Queens Univ Belfast, Inst Elect Commun & Informat Technol, Belfast BT3 9DT, Antrim, North Ireland
来源：
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY | 2008年 / 57卷 / 01期
基金：
英国工程与自然科学研究理事会;
关键词：
frequency-domain equalizer; frequency-selective multiple-input-multiple-output (MIMO) channels; iterative receiver; single carrier with cyclic prefix (SCCP);
D O I：
10.1109/TVT.2007.905395
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In this paper, a reduced-complexity soft-interference-cancellation minimum mean-square-error.(SIC-MMSE) iterative equalization method for severe time-dispersive multiple-input-multiple-output (MIMO) channels is proposed. To mitigate the severe time dispersiveness of the channel, a single carrier with cyclic prefix is employed, and the equalization is per-formed in the frequency domain. This simplifies the challenging problem of equalization in MIMO channels due to both the intersymbol interference (ISI) and the coantenna interference (CAI). The proposed iterative algorithm works in two stages. The first stage estimates the transmitted frequency-domain symbols using a low-complexity SIC-MMSE equalizer. The second stage converts the estimated frequency-domain symbols in the time domain and finds their means and variances to incorporate in the SIC-MMSE equalizer in the next iteration. Simulation results show the bit-/symbol-error-rate performance of the SIC-MMSE equalizer, with and without coding, for various modulation schemes.
引用
收藏
页码：594 / 600
页数：7
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