Channel coding for discrete memoryless channels (DMCs) with mean and variance cost constraints has been studied recently. In this work, we show that there is coding performance improvement due to the cost variability, both with feedback and without feedback. We demonstrate this improvement over the almost-sure cost constraint that prohibits any cost variation above a fixed threshold.

翻译：最近研究了具有均值和方差成本约束的离散无记忆信道（DMCs）的信道编码。在这项工作中，我们表明，无论有无反馈，成本可变性都能带来编码性能的提升。我们通过对比几乎确定成本约束（该约束禁止任何超过固定阈值的成本变化）来证明这一改进。