噪声调制连续波雷达信号波形射频隐身特性

RF Stealth Characteristic of Noise Modulated Continuous Wave Radar Signals

雷达信号波形的射频(RF)隐身性能是雷达系统能否适应现代战场环境的重要因素,雷达射频隐身信号波形设计是现代雷达系统设计中的重要课题。首先,在介绍随机噪声信号雷达原理的基础上,基于Schleher截获因子阐述了噪声调制连续波雷达信号波形的射频隐身特性。然后,分析了高斯噪声相位和频率调制连续波雷达输出自相关函数和高斯噪声相关系数之间的关系,通过仿真研究了高斯噪声均方根(RMS)的不同取值对高斯噪声相位和频率调制连续波雷达信号波形射频隐身性能的影响。最后,构建了一种噪声调制对称三角线性调频连续波(STLFMCW)雷达信号波形,仿真表明该雷达信号波形具有良好的射频隐身特性,并且通过增加高斯噪声信号的带宽和自适应控制高斯噪声信号的功率水平可提高其射频隐身性能。研究表明,噪声调制连续波雷达信号波形是一种具有良好射频隐身特性的雷达信号波形。

To a radar system, the radio frequency （RF） stealth of radar signal waveform is one of the important factors in modern battlefield. RF stealth radar waveform design is an important issue in design of modern radar systems. First, the principle of random noise signal radar is introduced and its RF stealth of waveform is analyzed in theory based on the Schleher intercept factor. Second, the relationship is analyzed between the output autocorrelation function of the Gaussian noise phase and frequency modulated continuous wave radar and the correlation coefficient of Gaussian noise. The effect of different root mean square （RMS） of the Gaussian noise on the RF stealth of the Gaussian noise phase and frequency modulated continuous wave radar signal waveform is studied through simulation. Lastly, a Gaussian noise plus symmetrical triangular linear frequency modulation continuous wave （STLFMCW） radar signal waveform is constructed. The study shows that the RF stealth of the Gaussian noise plus STLFMCW radar signal waveform is good and its RF stealth performance can be improved by increasing the bandwidth and decreasing the power level of the Gaussian noise signal. The research shows that the noise modulated continuous wave radar signal waveform possesses good RF stealth characteristic.