适于弹载平台的正交多载波雷达波形设计

Orthogonal Multi- carrier Radar Waveform Design for Missile-based Platform

设计了一种适于弹载平台的多载波雷达波形,模糊函数近似理想图钉型,且波形设计灵活,参数选择自由度高,与传统的单载波雷达波形相比,被截获概率大大降低。给出了一种具有9个子载波数量的雷达基带波形设计方案,为进一步改善主副瓣比,采用了脉间波形捷变及子载波频域加权技术,实现结果表明在基带信号带宽为9 MHz时主副瓣比可达-35 d B以下,且不同调制序列得到的雷达波形具有良好的低互相关特性,特别适合于多部弹载雷达协同工作场合。

A multi-carrier radar waveform for missile-based radar is designed,whose ambiguousfunction can approach ideal thumbtack pattern. Furthermore,flexibility of designed radar waveform isvery outstanding,and waveform parameters can be modified freely according to different requirements.Compared with classic single-carrier radar waveforms,probability of interception is also decreasedgreatly. A baseband radar waveform design strategy with 9 sub -carriers is presented,to reducesidelobe of distance-dimension data,inter-pulse waveform agility and sub-carrier weighting windowtechnology can be adopted,too. Implemented results showed that when baseband signal width is9MHz,corresponding mainlobe sidelobe ratio can be lower than -35dB. Besides,different sub-carriermodulation sequence pattern can acquire enormous waveform with wonderful low cross -correlationlevel,which is much practical especially for multiple missile-based radar co-working system.