Theoretical reliability of MMSE linear diversity combining in Rayleigh-fading additive interference channels
Theoretical reliability of MMSE linear diversity combining in Rayleigh-fading additive interference channels
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DOI：
10.1109/26.668742
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发表时间：
1998-05
期刊：
影响因子：
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通讯作者：
Hongsheng Gao;Peter J. Smith;M. V. Clark
中科院分区：
文献类型：
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作者：
Hongsheng Gao;Peter J. Smith;M. V. Clark
我们推导出一个精确的封闭形式的解决方案，一个理想的M-分支MMSE（最小均方误差）分集合并器在瑞利衰落信道与N个干扰器，每个有一些指定的平均功率的可靠性。可靠性被定义为在期望信号和干扰信号的衰落上合并器的输出信号干扰比（SINR）大于某个指定阈值的概率。这种度量对于评估在干扰受限的无线系统中使用分集合并和自适应阵列处理的潜在容量改进是重要的。我们的结果是非常简单，快速，直接计算，数值稳定。我们展示了一组特殊的情况下，这涉及到标准的结果，并揭示了这种类型的阵列处理如何在干扰有限的环境中运作的宝贵见解。我们还提出了一组数值例子，这表明我们计算的可靠性同意从Monte Carlo模拟的估计。
We derive an exact closed-form solution for the reliability of an ideal M-branch MMSE (minimum mean-squared error) diversity combiner operating in a Rayleigh-fading channel with N interferers, each having some specified average power. The reliability is defined as the probability, taken over fading of the desired and interfering signals, that the combiner's output signal-to-interference ratio (SINR) is greater than some specified threshold. This kind of metric is important in evaluating the potential capacity improvements of using diversity combining and adaptive array processing in interference-limited wireless systems. Our result is remarkably simple, fast, straightforward to compute, and numerically stable. We show a set of special cases, which relate to standard results and reveal valuable insights into how this type of array processing operates in interference-limited environments. We also present a set of numerical examples, which show that our calculated reliabilities agree with estimates from Monte Carlo simulation.