To reduce the consumption of spectrum and hardware resources, three methods are proposed to design the integrated radar and communication waveforms transmitted by a shared array. First, a minimum norm optimization (MNO) method is proposed to devise the transmit waveforms that can simultaneously synthesize desired radar and communication waveforms in different directions. The transmit beampattern formed by the designed waveforms has low sidelobe level (SLL). However, the designed waveforms may have high peak-to-average power ratio (PAPR). To reduce the PAPR, an iterative optimization (IO) method is proposed to devise the transmit waveforms with constant modulus. Then, to further reduce the SLL of the transmit beampattern formed by the designed constant modulus waveforms, the amplitude of each transmit waveform is iteratively optimized, which is referred to as iterative optimization with amplitude weighting (IO-AW) method. Finally, several numerical results show that the transmit waveforms designed by the proposed methods can simultaneously perform the radar and communication functions and can form the transmit beampattern with low SLL.

为了减少频谱和硬件资源的消耗，提出了三种方法来设计由共享阵列发送的集成雷达和通信波形。首先，提出了一种最小范数优化（MNO）方法，以设计能够同时在不同方向上合成所需雷达和通信波形的发射波形。由设计波形形成的发射波束图具有较低的旁瓣电平（SLL）。但是，设计的波形可能具有较高的峰均功率比（PAPR）。为了降低PAPR，提出了一种迭代优化（IO）方法来设计具有恒定模量的发射波形。然后，为了进一步减小由设计的恒定模量波形形成的发射波束图的SLL，迭代地优化每个发射波形的幅度，这称为振幅加权迭代优化（IO-AW）方法。最后，一些数值结果表明，所提出的方法设计的发射波形可以同时执行雷达和通信功能，并可以形成具有低SLL的发射波束图。