论文标题
联合安全通信和雷达波束形成：基于保密的估计率设计
Joint Secure Communication and Radar Beamforming: A Secrecy-Estimation Rate-Based Design
论文作者
论文摘要
本文考虑了双功能雷达通信（DFRC）系统中的发射光束形成，其中DFRC发射器同时与通信用户通信并检测具有相同波形的恶意目标。由于波形嵌入了信息，因此该信息可能会被目标拦截。为了解决这个问题，利用了物理层安全技术。通过分别将保密率和估计率作为通信和雷达的性能度量，提出了三个保密率最大化（SRM）问题，包括具有和不具有人工噪声的SRM（AN）和鲁棒的SRM。对于SRM波束形成，我们证明可以以封闭形式计算最佳光束形式。对于AN-ADAID SRM，通过利用交替优化的相似的封闭形式解决方案，可以为波束形式和AN协方差矩阵获得。最后，在到达目标方向上的基于力矩的随机相位纠错模型的前提下，目标的不完善的CSI也被考虑。仿真结果证明了拟议设计的功效和鲁棒性。
This paper considers transmit beamforming in dual-function radar-communication (DFRC) system, where a DFRC transmitter simultaneously communicates with a communication user and detects a malicious target with the same waveform. Since the waveform is embedded with information, the information is risked to be intercepted by the target. To address this problem, physical-layer security technique is exploited. By using secrecy rate and estimation rate as performance measure for communication and radar, respectively, three secrecy rate maximization (SRM) problems are formulated, including the SRM with and without artificial noise (AN), and robust SRM. For the SRM beamforming, we prove that the optimal beamformer can be computed in closed form. For the AN-aided SRM, by leveraging alternating optimization similar closed-form solution is obtained for the beamformer and the AN covariance matrix. Finally, the imperfect CSI of the target is also considered under the premise of a moment-based random phase-error model on the direction of arrival at the target. Simulation results demonstrate the efficacy and robustness of the proposed designs.
