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When is FDMA Sum-Rate Optimal in 2x2 Gaussian Interference Channel?

机译:什么时候在2x2高斯干扰信道中FDMA求和速率最佳?

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摘要

Consider a 2x2 Gaussian interference channel system in a frequency flat environment. We aim to derive sufficient conditions under which frequency division multiple access (FDMA) is optimal, in the objective of sum-rate maximization under power budget constraints of individual users. Two types of conditions are obtained. Briefly, the former one states that the normalized interference channel gain has to be large enough. The corresponding formula can be further extended to Kx K (K>2) multi-user scenario. The latter one is that the power budget has to be large enough, even if the normalized interference channel gain is small.
机译:考虑在平坦频率环境中的2x2高斯干扰信道系统。我们的目的是在个体用户功率预算约束下求和率最大化的前提下,得出频分多址(FDMA)最佳的充分条件。获得两种类型的条件。简而言之,前者指出归一化干扰信道增益必须足够大。相应的公式可以进一步扩展到Kx K(K> 2)多用户方案。后者是,即使归一化干扰信道增益很小,功率预算也必须足够大。

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