论文标题
多访问集成感应和通信系统的基本限制
Fundamental Limits of Multiple-Access Integrated Sensing and Communication Systems
论文作者
论文摘要
考虑到状态依赖性的无内存多个访问通道来建模一个集成的感应和通信系统，其中两个发射器希望将消息传达给接收器，同时通过回声信号同时估算状态参数序列。特别是，假定感应状态参数与通道状态相关。在此设置中，得出了能力延伸区域的内部和外部边界。内部界限是基于一个可实现的方案，该方案结合了消息合作和对每个发射器的过去传输代码字和回声信号的联合压缩，从而产生了统一的合作通信和感应。外部界限基于依赖率平衡的思想，善意辅助状态估计器以及对传感失真的限制限制。事实证明，所提出的内部和外部边界可以改善最新边界。最后，提供了数值示例，以证明我们的新内在和外部边界严格改善了现有结果。
A state-dependent discrete memoryless multiple access channel is considered to model an integrated sensing and communication system, where two transmitters wish to convey messages to a receiver while simultaneously estimating the state parameter sequences through echo signals. In particular, the sensing state parameters are assumed to be correlated with the channel state. In this setup, improved inner and outer bounds for capacity-distortion region are derived. The inner bound is based on an achievable scheme that combines message cooperation and joint compression of past transmitted codewords and echo signals at each transmitter, resulting in unified cooperative communication and sensing. The outer bound is based on the ideas of dependence balance for communication rate, genie-aided state estimator and rate-limited constraints on sensing distortion. The proposed inner and outer bounds are proved to improve the state-of-the-art bounds. Finally, numerical examples are provided to demonstrate that our new inner and outer bounds strictly improve the existing results.
