This paper considers the achievable rate-exponent region of integrated sensing and communication systems in the presence of variable-length coding with feedback. This scheme is fundamentally different from earlier studies, as the coding methods that utilize feedback impose different constraints on the codewords. The focus herein is specifically on the Gaussian channel, where three achievable regions are analytically derived and numerically evaluated. In contrast to a setting without feedback, we show that a trade-off exists between the operations of sensing and communications.

翻译：本文研究了在采用带反馈的变长编码条件下，集成感知与通信系统的可达率-指数区域。该方案与早期研究存在本质区别，因为利用反馈的编码方法对码字施加了不同的约束。本文特别聚焦于高斯信道，通过解析推导和数值计算得到了三个可达区域。与无反馈场景相比，我们证明了感知操作与通信操作之间存在权衡关系。