Title: MAJoRCom: A Dual-Function Radar Communication System Using Index Modulation Show Chinese title

Title: MAJoRCom：一种使用索引调制的双功能雷达通信系统

Abstract: Dual-function radar communication (DFRC) systems implement both sensing and communication using the same hardware. Such schemes are often more efficient in terms of size, power, and cost, over using distinct radar and communication systems. Since these functionalities share resources such as spectrum, power, and antennas, DFRC methods typically entail some degradation in both radar and communication performance. In this work we propose a DFRC scheme based on the carrier agile phased array radar (CAESAR), which combines frequency and spatial agility. The proposed DFRC system, referred to as multi-carrier agile joint radar communication (MAJoRCom), exploits the inherent spatial and spectral randomness of CAESAR to convey digital messages in the form of index modulation. The resulting communication scheme naturally coexists with the radar functionality, and thus does not come at the cost of reduced radar performance. We analyze the performance of MAJoRCom, quantifying its achievable bit rate. In addition, we develop a low complexity decoder and a codebook design approach, which simplify the recovery of the communicated bits. Our numerical results demonstrate that MAJoRCom is capable of achieving a bit rate which is comparable to utilizing independent communication modules without affecting the radar performance, and that our proposed low-complexity decoder allows the receiver to reliably recover the transmitted symbols with an affordable computational burden. Show Chinese abstract

Abstract: 双功能雷达通信（DFRC）系统使用相同的硬件实现感知和通信。 这种方案在尺寸、功率和成本方面通常比使用独立的雷达和通信系统更高效。 由于这些功能共享如频谱、功率和天线等资源，DFRC方法通常会导致雷达和通信性能的一定程度下降。 在本工作中，我们提出了一种基于载波敏捷相控阵雷达（CAESAR）的DFRC方案，该方案结合了频率和空间敏捷性。 所提出的DFRC系统称为多载波敏捷联合雷达通信（MAJoRCom），利用CAESAR固有的空间和频谱随机性，以索引调制的形式传递数字消息。 由此产生的通信方案自然与雷达功能共存，因此不会以降低雷达性能为代价。 我们分析了MAJoRCom的性能，并量化了其可实现的比特率。 此外，我们开发了一种低复杂度解码器和一种码本设计方法，这简化了所传递比特的恢复。 我们的数值结果表明，MAJoRCom能够实现与使用独立通信模块相当的比特率，同时不影响雷达性能，而且我们提出的低复杂度解码器使接收机能够以可接受的计算负担可靠地恢复传输的符号。