Reduced-complexity power allocation and modulation scheme for image transmission over wireless channels

被引：0
|
作者：
Bin Sediq, Akram [1 ]
El-Tarhuni, Mohamed [2 ]
机构：
[1] Carleton Univ, Ottawa, ON K1S 5B6, Canada
[2] American Univ Sharjah, Sharjah, U Arab Emirates
来源：
2007 9TH INTERNATIONAL SYMPOSIUM ON SIGNAL PROCESSING AND ITS APPLICATIONS, VOLS 1-3 | 2007年
关键词：
D O I：
暂无
中图分类号：
TP39 [计算机的应用];
学科分类号：
081203 ; 0835 ;
摘要：
In this paper, a low-complexity power allocation scheme for M-QAM is proposed with no need for feedback of channel state information The Optimization is based on bit power allocation according to the importance of bits to the overall image quality. An iterative off-line algorithm is presented to find the optimum power and modulation level allocated to different bits. Our results show that the proposed scheme performs similar to the optimized M-QAM scheme over slow fading channel, yet with much lower complexity. For the case of the variable M-QAM system, a slight degradation of about 2 dB for high Eb/N0 is experienced by the proposed scheme which is again compensated for by the lower complexity of the system.
引用
收藏
页码：1210 / +
页数：2
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