针对应用相位调制于线性调频(LFM)的探通一体化波形设计方法中自相关旁瓣水平高且误符号率较高的问题,文中提出了联合正交波形选择和脉冲重复间隔(PRI)捷变的双重索引调制方法。首先,通过对LFM波形附加扰动相位实现有良好自相关和互相关性能的正交波形集。其次,详细给出了通信信息的调制和解调方法。最后,结果表明设计的一体化波形不仅能满足雷达探测性能而且具有良好的自相关特性,此外在低信噪比条件下误符号率低。

To address the problems of high autocorrelation sidelobe level and high false symbol rate in the probe-through integrated waveform design method applying phase modulation to linear frequency modulation (LFM), this paper proposes a joint orthogonal waveform selection and pulse repetition interval (PRI) shortcut double index modulation method. Firstly, the orthogonal waveform sets with good autocorrelation and cross-correlation performance are realized by attaching perturbation phases to the LFM waveforms. Second, the modulation and demodulation methods for communication messages are given in detail. Finally, the results show that the designed integrated waveforms not only meet the radar detection performance but also have good autocorrelation properties, in addition to low false symbol rate under low signal-to-noise ratio conditions.

TN957. 51

重庆市自然科学基金资助项目(No. cstc2019jcyjmsxmX0810);国家重点研发计划子课题(2021YFB3901405; 2021YFB3901400)