Asymptotic error analysis of diversity schemes on arbitrarily correlated rayleigh channels
Asymptotic error analysis of diversity schemes on arbitrarily correlated rayleigh channels
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DOI：
10.1109/tcomm.2010.05.080458
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发表时间：
2010-05
影响因子：
8.3
通讯作者：
Shuo Liu;Julian Cheng;N. Beaulieu
中科院分区：
文献类型：
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作者：
Shuo Liu;Julian Cheng;N. Beaulieu
推导了任意相关瑞利衰落信道下多分支等增益组合和选择组合的渐近误码率表达式。这些封闭形式的解用于在大信噪比区域提供快速和准确的错误率估计。更重要的是，它们揭示了在相关瑞利衰落信道上运行的线性分集组合方案的传输特性。结果表明，相关分支上的渐近错误率可以通过用det(M)因子对独立分支上的渐近错误率进行缩放得到，其中det(M)是归一化通道相关矩阵的行列式。这种关系对相干和非相干信号都有效。对于采用多分支分集接收的衰落无线系统的中断概率，也建立了类似的关系。
Asymptotic error rate expressions are derived for multi-branch equal gain combining and selection combining operating on arbitrarily correlated Rayleigh fading channels. These closed-form solutions are used to provide rapid and accurate estimation of the error rates in large signal-to-noise ratio regions. More importantly, they reveal additional insights into the transmission characteristics of linear diversity combining schemes operating on correlated Rayleigh fading channels. It is shown that the asymptotic error rates over correlated branches can be obtained by scaling the asymptotic error rates over independent branches with a factor, det(M), where det(M) is the determinant of the normalized channel correlation matrix. This relationship is valid for both coherent and noncoherent signalings. A similar relationship is also established for the outage probabilities of fading wireless systems employing multi-branch diversity reception.