In this paper, an efficient dual function radar-communication system is proposed to improve the system's resource utilization. In this work, we considered a scenario where the location of the communication receiver is known prior but the radar target is moving and its location is changing with time. Therefore, we proposed a closed-loop design that allows an adaptive selection of appropriate information embedding strategies during tracking operations. We used two strategies that utilize the amplitudes and/or phases of the transmitted radar waveforms toward the communication direction according to the position of the communication receiver during each scan. Hence, during each radar illumination, the system carries out a target-tracking task and simultaneously maintains the communication symbols transmission toward the intended communication direction. The simulation results verify the effective performance of the proposed approach in terms of target detection and tracking performance and angular bit error rate (BER). Furthermore, the proposed amplitude phase-shift keying signaling strategy can transmit different communication symbols to different users located within the sidelobe region and also provides a significant improvement in data rate transmission and BER performance compared with the existing sidelobe-based communication strategies.

本文提出了一种高效的双功能雷达通信系统，以提高系统的资源利用率。在这项工作中，我们考虑了一个场景，其中通信接收器的位置是事先已知的，但雷达目标正在移动并且其位置随时间而变化。因此，我们提出了一种闭环设计，允许在跟踪操作期间自适应选择适当的信息嵌入策略。我们使用了两种策略，根据每次扫描期间通信接收器的位置，利用向通信方向发送的雷达波形的幅度和/或相位。因此，在每次雷达照射期间，该系统执行目标跟踪任务，同时保持通信符号向预期通信方向传输。仿真结果验证了所提方法在目标检测和跟踪性能以及角误码率（BER）方面的有效性能。此外，所提出的幅度相移键控信令策略可以向位于旁瓣区域内的不同用户传输不同的通信符号，并且与现有的基于旁瓣的通信策略相比，还提供了数据速率传输和BER性能的显着提高。