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首页> 外文会议>Information Sciences and Systems, 2009. CISS 2009 >Upper and lower bound on signal-to-noise ratio gains for cooperative relay networks
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Upper and lower bound on signal-to-noise ratio gains for cooperative relay networks

机译：协作中继网络的信噪比增益的上限和下限

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摘要

Cooperative networking as a means of creating spatial diversity is used in order to mitigate the adverse effect of fading in a wireless channel and increase reliability of communications. We investigate signal-to-noise ratio (SNR) gain in wireless cooperative networks. We show that the differential SNR gain in the high data rate regime, which we refer to as SNR gain exponent zetainfin, is independent of the relaying strategy and only depends on the number of transmission phases used for communication. Furthermore, a straight-line upper and lower bound is derived based on geometric considerations. It is shown that the approximation error of the upper bound with respect to the exact SNR gain tends to zero for R rarr infin. For the lower bound, the approximation error tends asymptotically to a constant factor delta for R rarr infin. Both bounds are the best possible straight-line bounds with respect to absolute error.
机译：为了减轻无线信道中的衰落的不利影响并提高通信的可靠性，使用了协作网络作为创建空间分集的一种手段。我们研究了无线协作网络中的信噪比（SNR）增益。我们表明，在高数据速率方案中的差分SNR增益（称为SNR增益指数zeta infin ）与中继策略无关，并且仅取决于用于通信的传输相位数。此外，基于几何考虑，得出直线的上限和下限。结果表明，对于R rarr infin，上限相对于精确SNR增益的近似误差趋于零。对于下限，R rarr infin的逼近误差渐近趋于恒定因子delta。就绝对误差而言，两个边界都是最佳的直线边界。

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