Rate-Embedded Doubly Directional Differential Space-Time-Frequency Coding Schemes

被引：0
|
作者：
Zhang, Hongwei [1 ]
Li, Xiaohui [1 ]
Lu, Lu [2 ]
机构：
[1] Anhui Univ, Key Lab Intelligent Comp & Signal Proc, Minist Educ, Hefei 230039, Peoples R China
[2] Hefei Informat Resource Management Ctr, Hefei, Peoples R China
来源：
2009 5TH INTERNATIONAL CONFERENCE ON WIRELESS COMMUNICATIONS, NETWORKING AND MOBILE COMPUTING, VOLS 1-8 | 2009年
关键词：
multiple-input-multiple-output; spectral efficiency; orthogonal-frequency-division-multiplexing; differential space-time-frequency; rate-embedded; MODULATION;
D O I：
暂无
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：
Due to a great many redundancy symbols, most of the existing differential space-time-frequency (DSTF) coding schemes suffer very low transmission rates. To overcome the disadvantage and obviously enhance the total transmission rate in a differential multiple-input-multiple-output (MIMO) orthogonal-frequency-division-multiplexing (OFDM) system, a rate embedded doubly directional DSTF coding scheme is proposed for doubly selective fading channels in this paper. High rate differentially coded matrices are embedded into proper time blocks and sub-carriers. In the frequency domain, both high rate non-unitary message matrices and low rate unitary message matrices are differentially transmitted alternately. In the time domain, all message matrices have full rates. Simulation results verify that, compared with those conventional DSTF coding schemes, the proposed scheme can achieve better error performances with higher transmission rates.
引用
收藏
页码：74 / +
页数：2
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