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A Case Where Interference Does Not Affect the Channel Dispersion

机译:干扰不影响信道色散的情况

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摘要

In 1975, Carleial presented a special case of an interference channel, called the very strong interference regime, in which the interference does not reduce the capacity of the constituent point-to-point Gaussian channels. In this paper, we show that in the strictly very strong interference regime, the dispersions are similarly unaffected. More precisely, in this paper, we characterize the second-order coding rates of the Gaussian interference channel in the strictly very strong interference regime. In other words, we characterize the speed of convergence of rates of optimal block codes toward a boundary point of the (rectangular) capacity region. These second-order coding rates are expressed in terms of the average probability of error and variances of appropriately defined information densities which coincide with the dispersion of the (single-user) Gaussian channel. This allows us to conclude that the dispersions are unaffected by interference in this channel model.
机译:1975年,Carleial提出了一种特殊情况下的干扰信道,称为非常强的干扰机制,其中干扰不会降低组成点对点高斯信道的能力。在本文中,我们表明,在严格非常强的干扰状态下,色散同样不受影响。更准确地说,在本文中,我们描述了在严格非常强的干扰机制下高斯干扰信道的二阶编码率。换句话说,我们描述了最优块码速率向(矩形)容量区域的边界点收敛的速度。这些二阶编码率用平均错误概率和适当定义的信息密度的方差表示,这些信息密度与(单用户)高斯信道的色散一致。这使我们可以得出结论,在该信道模型中,色散不受干扰的影响。

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