论文标题
固定通道状态的联合通信和传感的速率和检测错误指数折衷
Rate and Detection-Error Exponent Tradeoff for Joint Communication and Sensing of Fixed Channel States
论文作者
论文摘要
当将传感任务建模为在整个代码字传输过程中固定的离散通道状态时，我们研究了联合通信和传感的信息理论限制。此设置捕获了情况，其中传感发生的时间尺度明显慢于符号传输的时间尺度。然后，沟通和传感之间的权衡取决于可靠的沟通率和国家检测率指数之间的权衡区域的形式。我们研究了单静态和双静态场景的这种权衡，其中分别在发射器或接收器执行传感任务。在单静态情况下，当不使用感应来协助交流时，我们会在开环中对折衷的确切表征进行确切的特征。我们还显示了闭环操作带来的严格改进，其中传感为通信提供了信息。在双静态案例中，我们开发了一个可实现的权衡区域，该地区强调了双静态方案的根本不同的性质。具体而言，交流速度在折衷的表征中起着关键作用，我们展示了联合策略（同时估算信息和状态，超过连续策略）如何在解码传输信息后才估算状态。
We study the information-theoretic limits of joint communication and sensing when the sensing task is modeled as the estimation of a discrete channel state fixed during the transmission of an entire codeword. This setting captures scenarios in which the time scale over which sensing happens is significantly slower than the time scale over which symbol transmission occurs. The tradeoff between communication and sensing then takes the form of a tradeoff region between the rate of reliable communication and the state detection-error exponent. We investigate such tradeoffs for both mono-static and bi-static scenarios, in which the sensing task is performed at the transmitter or receiver, respectively. In the mono-static case, we develop an exact characterization of the tradeoff in open-loop, when the sensing is not used to assist the communication. We also show the strict improvement brought by a closed-loop operation, in which the sensing informs the communication. In the bi-static case, we develop an achievable tradeoff region that highlights the fundamentally different nature of the bi-static scenario. Specifically, the rate of communication plays a key role in the characterization of the tradeoff and we show how joint strategies, which simultaneously estimate message and state, outperform successive strategies, which only estimate the state after decoding the transmitted message.
