多载波相位编码雷达信号波形,在频域上包含多个子载波,在时域上采用分段编码,能够有效降低接收机的循环自相关特性,提高雷达发射信号被敌方侦收机截获和解析的难度,具有良好的抗欺骗干扰与低截获性能。但多载波相位编码波形具有多普勒敏感性,在高速运动平台上应用时,运动会导致信号脉冲压缩后主副瓣比降低,造成脉冲压缩与相参积累损失。对此,文中提出了一种多普勒前置补偿技术,在多载波相位编码波形产生阶段,利用运动平台速度对该波形的每个子载波进行精细的多普勒预置补偿,有效降低了该波形的多普勒敏感性,同时该方法具有便于工程实现的特点。仿真结果表明,该方法在高速平台应用条件下能够有效地抑制脉冲压缩旁瓣,降低脉冲压缩和相参积累损失。

The multi-carrier phase coded radar signal waveform contains multiple subcarriers in the frequency domain and adopts segmented coding in the time domain. Such waveform, which has a good anti deception jamming and low interception performance, can reduce the cyclic autocorrelation matching degree and make it difficult being replicated and analyzed by enemy receivers. However, due to the Doppler sensitivity of this waveform, a high sidelobe will bring in gain loss in pulse compression and coherent accumulation when it is applied on a high-speed moving platform. In this paper, a novel Doppler pre-compensation technology is proposed, which performs Doppler compensation for each frequency hopping point and subcarrier during the waveform generation phase. The proposed method can decrease Doppler sensitivity and signal loss, and it is convenient for engineering implementation. The simulation results show that this method can effectively compress the pulse sidelobe and reduce the gain loss in pulse compression.

TN957.51

国家自然科学基金资助项目(62001486,62201587)