Adaptive Space-Time Trellis Codes Based on Convolutional Codes

被引：0
|
作者：
Bernier, David [1 ]
Chan, Francois [1 ]
机构：
[1] Royal Mil Coll Canada, Dept Elec & Comp Eng, Kingston, ON K7K 7B4, Canada
来源：
2006 IEEE 64TH VEHICULAR TECHNOLOGY CONFERENCE, VOLS 1-6 | 2006年
关键词：
space-time coding; MIMO (Multiple-Input Multiple Output) systems; diversity; convolutional codes; adaptive modulation; punctured codes;
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：
Space-time trellis codes can significantly improve the error performance or the data rate of wireless communications systems with multiple transmit antennas. These codes are usually generated using a generator matrix with 2 columns and modulo 4 operations for QPSK modulation with two transmit antennas. They can also be implemented as Z(4) convolutional codes. Another way of representing them is to use a conventional binary convolutional code of rate 2/4. Such a representation is more flexible and allows an easy implementation of space-time encoders and decoders with different modulation schemes and numbers of transmit antennas. Only the rate of the convolutional code needs to be changed using the puncturing technique to accommodate these different schemes. Simulations results have shown that the new codes can achieve an error performance very close to that of the best usual space-time codes.
引用
收藏
页码：326 / 330
页数：5
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