非连续谱雷达信号设计综述

非连续谱雷达信号是一种特殊的认知雷达信号，其频谱由多个离散的频带组成，且能够随着外界干扰的变化自适应地调整离散频带的分布结构。因此，这种信号适用于干扰密布、频谱拥堵的工作场景。非连续谱信号设计主要研究两个问题:一是如何根据干扰环境选取最优的非连续频谱结构以满足雷达抗干扰和分辨性能要求；二是如何根据最优的非连续频谱求解出时域发射信号。非连续谱雷达信号的一个典型应用是高频雷达的抗同频干扰，随着电子对抗的升级以及多电子设备共存引起的频谱拥堵问题，非连续谱信号在雷达抗干扰、电磁频谱兼容等方面日益受到重视。该文对非连续谱信号设计准则与约束、工作频带选取与塑形以及时域信号波形合成等3个方面的研究进行了归纳与总结，以促进非连续谱信号的研究与应用。 

Review of Signal Design for Discontinuous Spectrum Radar

The discontinuous spectrum radar signal is a featured cognitive radar signal. Its spectrum is discontinuous and comprises multiple discrete frequency bands, and the distribution structure of the discrete frequency bands can be adapted to the change of external interference adequately. Therefore, this segmented signal is suitable for dense interference and congested spectrum based spectrum scenarios. The design of discontinuous spectrum signal is focused on two issues: (1) the optimal selection of the discontinuous spectrum structure in accordance with the interference environment to meet the requirements of radar anti-jamming and resolution performance, and (2) the solution of the time-domain emission based on the optimal discontinuous spectrum signal. A typical application of discontinuous spectrum radar signals is the anti-co-frequency interference derived of high-frequency radar. With the upgrade of electronic countermeasures and the spectrum congestion problem caused by the coexistence of multiple electronic devices, discontinuous spectrum signals are used in radar anti-jamming and electromagnetic spectrum compatibility. This paper discusses and summarizes the research on discontinuous signal design criteria and constraints, working frequency band selection and shaping, and time-domain signal waveform synthesis to promote the research and application of discontinuous spectrum signals.