关键词: 软件化雷达, 波形矩阵, 波形产生, 脉间调制, 波形捷变, 调制引擎, 现场可编程门阵列, 波形对抗

Abstract:

Aiming at the problem of the efficient and flexible generation of software radar complex modulation waveforms, the complex modulation pulse train is abstractly described as a waveform matrix with the coherent processing interval as the update period, and a radar waveform generation method that selects and separates is proposed, which reduce the amount of calculation of the host computer and the transmission delay to the hardware. On this basis, an field programmble gate array (FPGA)-based general-purpose modulation engine for radar waveforms is designed, which can realize the decoupling of waveform generation and waveform pattern, waveform optimization/selection and waveform generation decoupling. The system test based on commercial off-the-shelf (COTS) shows that the universal modulation engine can flexibly support arbitrary intra-pulse modulation, inter-pulse waveform agility, and inter-pulse parameter modulation such as phase, frequency deviation, amplitude, repetition interval, etc. Providing important design reference with flexible use to generate software radar waveforms.

Key words: software defined radar, wave matrix, waveform generation, inter-pulse modulation, waveform agility, modulation engine, field programmble gate array (FPGA), wave confrontation