Adaptive bit and power allocation algorithm in V-BLAST system

被引：0
|
作者：
Feng, XL [1 ]
Zhu, SH [1 ]
Wu, LJ [1 ]
机构：
[1] Xi An Jiao Tong Univ, Sch Elect & Informat Engn, Xian 710049, Peoples R China
来源：
2004 IEEE 15TH INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR AND MOBILE RADIO COMMUNICATIONS, VOLS 1-4, PROCEEDINGS | 2004年
关键词：
Multiple Input Multiple Output (MIMO); Bell Labs Layered Space-Time (BLAST); adaptive modulation; power allocation; mobile communications;
D O I：
10.1109/PIMRC.2004.1370919
中图分类号：
TN [电子技术、通信技术];
学科分类号：
0809 ;
摘要：
In the existing V-BLAST system with adaptive modulation, spectral efficiency decreases dramatically at lower SNR due to invalid subchannnel which doesn't meet the target BER. To resolve this problem, power reallocation algorithm is proposed in this paper. The post-detection SNR of valid subchannel can be improved by reallocating the power quotas of invalid channel to valid ones. Simulation results show that by means of proposed method the spectral efficiency increases obviously, especially when the SNR is low.
引用
收藏
页码：489 / 492
页数：4
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