A Multilayer Space-Time-Frequency Coding Scheme for MIMO-OFDM

被引：0
|
作者：
Yue, Guosen [1 ]
Zhang, Li [2 ]
Wang, Xiaodong [3 ]
机构：
[1] NEC Labs Amer Inc, Princeton, NJ 08540 USA
[2] Univ Calif Davis, Dept Elect & Comp Engn, Davis, CA 95616 USA
[3] Columbia Univ, Dept Elect Engn, New York, NY 10027 USA
来源：
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS | 2009年 / 8卷 / 12期
关键词：
Iterative demodulation; MIMO-OFDM; power allocation; space-time-frequency (STF) coding; EXIT chart analysis; CODES; DIVERSITY; DESIGN;
D O I：
10.1109/TWC.2009.12.090552
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：
We present a multilayer space-time-frequency (STF) coding scheme for wideband multiple-input multiple-output (MIMO) systems employing orthogonal frequency-division multiplexing (OFDM). With multiple receive antennas, we employ an iterative demodulator consisting of a low-complexity multilayer detector and a simple soft extrinsic combiner. The system performance is optimized by efficient power allocation among layers, as well as interleaver design and extrinsic scaling to reduce the extrinsic correlation. Simulation results demonstrate that the proposed multilayer STF coding scheme performs close to or even better than the optimized linear dispersion (LD) STF codes with maximum likelihood (ML) decoding. Unlike the existing STF codes, which need to be designed for different system configurations and channel statistics, the proposed multilayer STF strategy is a universal scheme that exhibit excellent performance under various conditions.
引用
收藏
页码：6104 / 6114
页数：11
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