无线传感器网络中放大转发与直连的信噪比比较

2007 2nd International Conference on Communication Systems Software and Middleware Pub Date : 2007-07-09 DOI:10.1109/COMSWA.2007.382467

R. Viswanathan

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引用次数: 4

摘要

我们比较了无线传感器网络中放大转发中继链路和直接链路的信噪比性能。对于慢瑞利衰落信道，得到了放大转发中继链路信噪比超过直接链路信噪比概率的精确表达式。对于一个衰落信道，得到了相应概率的上界。数值结果表明，在考虑的两种衰落信道中，瑞利衰落对前扩中继方案的信噪比性能影响较大。

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Signal-to-Noise Ratio Comparison of Amplify-Forward and Direct Link in Wireless Sensor Networks

We compare the signal-to-noise ratio performances of an amplify-forward relay link and a direct link in a wireless sensor network. For a slow Rayleigh fading channel, an exact expression for the probability that the SNR of an amplify-forward relay link exceeds the SNR of a direct link is obtained. For a Rician fading channel, an upper bound for the corresponding probability is obtained. Numerical results indicate that, among the two fading channels considered, Rayleigh fading is more detrimental to the SNR performance of the amplify-forward relaying scheme.

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2007 2nd International Conference on Communication Systems Software and Middleware

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