基于编码序列随机移位的MCPC雷达信号设计方法研究

多载频相位编码信号(MCPC)是近年来备受关注的一种新体制宽带雷达信号,其灵活的信号结构使其具备性能均衡、可调的特点,与此同时对参数设计的要求也相应提高.现有设计方法难以在模糊图和包络控制方面同时取得令人满意的性能,且大多只研究了载频数量较少的情况.针对此问题提出了一种编码序列随机移位的MCPC信号,具备理想的图钉状模...

Parameter Designing of Random Shifted Phase-coded MCPC Radar Signal

Multi-Carrier Phase-Coded Signal (MCPC) has caught much attention of researchers recently. The flexible structure enables its balanced and adjustable performance, while enhancing the demand of parameter designing. Current designing methods can hardly achieve satisfied ambiguity diagram and envelope control simultaneity, and they mostly perform the research with less sub carriers. This research proposed a random shifted phase-coded MCPC signal, whose ambiguity diagram is ideal thumbtack shaped. To deal with its fluctuating envelope time-frequency clipping iteration was brought forward, after which optimizing method was used to further reduce the side lobes of auto cross function (ACF). Simulation results show that the designed signal keeps ideal ambiguity diagram and low PMEPR at the same time, while maintaining good ACF on sub carriers. Compared with reported MCPC at present, this signal is more suitable for practical use in radar.