无人机雷达通信一体化(RadCom)系统中雷达接收信号是目标回波和通信信号的混合信号, 会产生互干扰问题。针对该问题, 改进标准正交频分复用信号, 设计了一种交织OFDM一体化信号, 其中, 每种无人机的一体化信号在信号带宽内使用不重叠的子载频集, 并利用基于调制符号的处理方法获取目标的高分辨距离-速度像, 没有降低可实现的距离分辨率。仿真结果表明, 所提方法在目标成像性能和计算复杂度上优于现有算法, 低信干比下的距离像峰值旁瓣比改善了约9 dB, 而且能够实现每秒兆比特级的高效数据通信。

Since the received signals suffer from mutual interference between the target echo and communication signals in UAV Radar-Communication integration(RadCom) system.In order to solve the problem,the standard OFDM signal is improved,an integrated signal model using interleaved OFDM is designed,in which each of the UAV is allocated a non-overlapping set of subcarriers within the signal bandwidth.A modulation symbol-based processing method is used to achieve the high resolution range-velocity image,no deterioration of the achievable range resolution.Simulation results show that the proposed method is superior to the existing method in the performance of target imaging and computational complexity,where the peak side lobe ratio of the range profile is improved by about 9 dB in low signal-to-interference ratio,and it can realize efficient data communication at megabits per second.