基于高分辨距离像的UWB雷达信号设计

UWB Radar Signal Design Based on High Resolution Range Profile

根据目标冲激响应设计相应的雷达信号,可使回波能量最大化,从而提高检测性能。本文针对目标检测的超宽带雷达信号设计发射-接收联合优化的问题,提出基于相位编码的超宽带雷达波形优化方法。该方法充分发挥了雷达发射机的发射能力,即对于固定的发射机来说,以发射更大的能量来得到更大的输出信干噪比。首先针对目标高分辨率距离像的多相编码超宽带雷达信号设计,建立了信号设计优化计算的目标函数,提出了一种恒模共轭梯度(CM-CG)算法实现优化计算。最后仿真结果表明,该方法设计得到的多相编码雷达信号性能很好地逼近最优发射波形,该方法具有收敛速度快、运算量小的特点。

The detection performance can be improved by designing related radar signals to maximize the energy of echoes according to the target impulse response. A new method based on phase-coded uhra-wideband signal is proposed in this paper in order to optimize the transmit-receiver waveform design by fully exploiting power of the transmitter to enhance output. The signal to Interference plus Noise Ratio （SINR） is increased for a fixed transmitter by transmitting more energy. To realize the poly-phase-coded uhra- wideband radar signal design based on High Resolution Range Profile （HRRP） of the target, a target function is first built for optimization calculation and then a new Constant-Module Conjugate Gradient （CM-CG） algorithm is used. Simulation results show that the poly-phase-coded radar signal derived by this algorithm approaches the optimal waveform and the method enjoys fast convergence and small computation amount.