The capacity of discrete-time memoryless Rayleigh-Fading channels

被引:274
作者
Abou-Faycal, IC
Trott, MD
Shamai, S
机构
[1] MIT, Dept Elect Engn & Comp Sci, Informat & Decis Syst Lab, Cambridge, MA 02139 USA
[2] Technion Israel Inst Technol, Dept Elect Engn, IL-32000 Haifa, Israel
基金
美国国家科学基金会;
关键词
capacity; fading channels; memoryless fading; Rayleigh fading; time-varying channels;
D O I
10.1109/18.923716
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
We consider transmission over a discrete-time Rayleigh fading channel, in which successive symbols face independent fading, and where neither the transmitter nor the receiver has channel state information. Subject to an average power constraint, we study the capacity-achieving distribution of this channel and prove it to be discrete with a finite number of mass points, one of them located at the origin. We numerically compute the capacity and the corresponding optimal distribution as a function of the signal-to-noise ratio (SNR), The behavior of the channel at low SNR is studied and finally a comparison is drawn with the ideal additive white Gaussian noise channel.
引用
收藏
页码:1290 / 1301
页数:12
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