New space-time-frequency codes for MIMO-OFDM systems in fast fading channel

被引：0
|
作者：
Gang, W [1 ]
Zhang, L [1 ]
Tang, YX [1 ]
Li, SQ [1 ]
Wang, Y [1 ]
机构：
[1] Univ Elect Sci & Technol China, Natl Key Lab Commun, Chengdu 610054, Peoples R China
来源：
INTERNET QUALITY OF SERVICE | 2003年 / 5245卷
关键词：
transmit diversity; orthogonal frequency-division multiplexing; space-time codes; multiple-input multiple-output; radio fading channel;
D O I：
暂无
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
Time-selectivity in fast fading channels has been one of big obstacles to attain high efficiency and diversity gain for space-times codes. Orthogonal-frequency-division-multiplexing (OFDM) combined with space-time trellis codes has been introduced to combat effect of frequency-selectivity. Subsequently, space-time block codes, space-frequency codes and concatenation with diverse error-correcting codes were investigated. However, for multiple-input multiple-out (MIMO) OFDM systems, to design high-efficiency robust space-time-frequency codes becomes one of big problems. In this paper, we presented pairwise error probability analysis of space-frequency-time block codes, and then concluded one general design criterion for space-time-frequency block codes by utilizing the frequency-correlation feature of sub-channel in mobile OFDM systems. Then, we investigated performance of space-frequency block codes for MIMO-OFDM systems with 4 transmit antennas. And comparison between space-frequency block codes and space-time block codes is performed with different number of transmit antenna. Link-level simulations on COSSAP((R)) verified analytical results. The results show that SFBC is superior to STBC in fast fading channel. And power-delay profile of fading channel, i.e., channel order and delay spread, must be included into design consideration on space-time-frequency codes.
引用
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页码：1 / 11
页数：11
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