Near-Capacity Adaptive Analog Fountain Codes for Wireless Channels

被引:62
|
作者
Shirvanimoghaddam, Mahyar [1 ]
Li, Yonghui [1 ]
Vucetic, Branka [1 ]
机构
[1] Univ Sydney, Sch Elect & Informat Engn, Ctr Excellence Telecommun, Sydney, NSW 2006, Australia
基金
澳大利亚研究理事会;
关键词
AWGN; fountain codes; message passing decoder; wireless channels;
D O I
10.1109/LCOMM.2013.101813.131972
中图分类号
TN [电子技术、通信技术];
学科分类号
0809 ;
摘要
In this paper, we propose a capacity-approaching analog fountain code (AFC) for wireless channels. In AFC, the number of generated coded symbols is potentially limitless. In contrast to the conventional binary rateless codes, each coded symbol in AFC is a real-valued symbol, generated as a weighted sum of d randomly selected information bits, where d and the weight coefficients are randomly selected from predefined probability mass functions. The coded symbols are then directly transmitted through wireless channels. We analyze the error probability of AFC and design the weight set to minimize the error probability. Simulation results show that AFC achieves the capacity of the Gaussian channel in a wide range of signal to noise ratio (SNR).
引用
收藏
页码:2241 / 2244
页数:4
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