面向高轨目标监视的脉内步进频-循环相位编码信号及其模糊函数分析

该文针对高轨空间目标监视问题，研究分布式相参雷达体制的波形设计问题，其核心目标是需要在确保波形良好正交性的前提下兼顾信号的大时宽带宽。该文提出一种引入循环码概念的脉内步进频与相位编码复合调制的波形，首先给出了脉内步进频-相位编码信号的时域表达式，然后推导出其模糊函数和自相关主峰幅度，其次引入循环码概念与设计，最后将脉内步进频-循环相位编码信号与其他信号进行了对比。仿真结果表明，与单调制信号和脉间调制信号相比，脉内步进频-循环相位编码信号具有更好的正交性，同时保证了信号的大带宽，为后续全相参雷达波形设计研究工作提供了较好的理论支撑。

Intrapulse Step Frequency-cyclic Phase Encoding Signal and Its Ambiguity Function Analysis Facing High-orbit Targets Monitoring

Considering the monitoring of space targets in high orbit, the waveform design of the distributed coherent radar system is studied. The core goal is to take into account the large time-bandwidth of the signal under the premise of ensuring good waveform orthogonality. In this paper, a compound modulation waveform of intrapulse step frequency and phase encoding is proposed. Firstly, the time domain expression of the intrapulse step frequency-phase encoding signal is given, and then its ambiguity function and autocorrelation main peak amplitude are deduced. Secondly, the concept of cyclic code is introduced, and finally the simulation results of intrapulse step frequency-cyclic phase coded signal are compared with other signals. The simulation results show that, compared with the single modulation signal and the pulse-to-pulse modulation signal, the intra-pulse step frequency-cyclic phase coding signal has better orthogonality, and at the same time ensures a large bandwidth of the signal. It provides a good theoretical support for the follow-up research work of distributed coherent radar.