In this paper, we propose a novel method for dual-function radar-communication(DFRC) system. Our focus is on radar being used for communications in parallel to conventional target tracking and/or surveillance assignment. In the proposed setup, the main beam is directed toward the targets as primary radar function, whereas, communication is performed through the sidelobes as secondary function. In addition, the nulls are used to avoid the jammers. A sophisticated null steering feature has been incorporated to deal with the moving jammers. In this null shifting, only the proposed null will be shifted, whereas, rest of the antenna radiation pattern including main beam and the other sidelobes will remain undisturbed. We also propose a new information embedding to transmit the communication signal in the radar emission by using the frequency shift keying (FSK) as orthogonal waveforms to transmit binary information towards the communication receivers and analyzing the impact of the FSK signals on the radar range measurements. Simulations are carried out and the results indicate the validity and performance of the proposed idea in terms of interference mitigation as well as Bit Error Rate (BER).

本文提出了一种用于双功能雷达通信（DFRC）系统的新方法。我们的重点是与常规目标跟踪和/或监视任务并行地用于通信的雷达。在建议的设置中，将主波束作为主要雷达功能指向目标，而通过旁瓣作为次要功能进行通信。另外，零值用于避免干扰。复杂的零点转向功能已被纳入，以应对移动的干扰机。在该零位偏移中，仅提议的零位将被偏移，而其余的天线辐射方向图（包括主波束和其他旁瓣）将保持不变。我们还提出了一种新的信息嵌入方法，即通过使用频移键控（FSK）作为正交波形向通信接收器传输二进制信息，并分析FSK信号对雷达测距的影响，从而在雷达发射中传输通信信号。进行了仿真，结果表明了该思想在减少干扰以及误码率（BER）方面的有效性和性能。