摘要
噪声调频连续波(NFMCW)信号的脉压输出具有表现为均匀噪声基底的随机旁瓣,通过对其统计规律的研究,推导了具有高斯型功率谱的NFMCW峰值旁瓣比(PSLR)及积分旁瓣比(ISLR)的数学表达式。研究结果表明:NFMCW的PSLR与相关时长、信号有效调制带宽及目标多普勒频率均有关;ISLR仅与相关时长以及目标多普勒频率有关,与信号有效调制带宽无关。MonteCarlo实验结果与推导结果一致。
The matched filter output of noise frequency modulated continuous wave （NFMCW） has the random sidelobes which are presented as a uniform noise floor. The mathematical expressions of peak sidelobe ratio （PSLR） and integrated sidelobe ratio （ISLR） of NFMCW with Gaussian power spectral density are derived via the statistical regularities of the sidelobes. The results indicate that PSLR depends on correlation time length, signal effective modulation bandwidth and Doppler frequency. ISLR depends on correlation time length and Doppler frequency, and the signal effective modulation bandwidth is irrelevant. The Monte-Carlo experimental results are consistent with the derived results.
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2014年第4期448-453,共6页
Acta Armamentarii
关键词
雷达工程
频率调制
主旁瓣比
噪声雷达
脉冲压缩
radar engineering
frequency modulation
main lobe-to-sidelobe ratio
noise radar
pulse compression
