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通过对雷达信号设计和信号处理的综合研究,导出了关于固定步长截断PN码集脉间码捷变信号的统计脉压特性通用表达式,提出了一种随机步长截断PN码集脉间码捷变信号。前者的近区主副瓣比优于码长L,但其跨周期远区主副瓣比很小。后者的统计脉压特性之跨周期主副瓣比优于前者,但仍然不够理想。针对这两者的缺陷而提出的一类新型脉间码捷变信号,其近区主副瓣比优于码长L,跨周期远区主副瓣比除极个别码长下的个别捷变步长外,也优于L,只要信号的码长足够长,不用加权处理即可得到所需的主副瓣比,而且其码产生器极易实现。
Through the comprehensive research of radar signal design and signal processing, a general expression of statistical pulse pressure characteristic of a fixed-step truncated PN code is proposed, and a new method of random step- Code agile signal. The former near-main-lobe ratio is better than the code length L, but its main-lobe ratio in the far-off period is very small. The latter is better than the former in terms of the main-lobe cross-period main-pulse ratio but still not ideal. Aiming at the shortcomings of both, a new type of pulse-to-pulse signal is proposed, whose main-side-lobe ratio is better than the code length L, and the main- Step length, but also better than L, as long as the signal code length long enough to be without the weight of the main and auxiliary required to get the ratio, and its code generator can be easily achieved.