数据采集与处理2012，Vol.27Issue(4)：450-455,6.
高斯噪声下伪码-线性调频复合信号参数提取方法
Parameter Extraction Method of Radar Signal Combined PRBC and LFM with Gaussian Noise
摘要
Abstract
To estimate the parameters of radar signals combined pseudo-random binary phase code (PRBC) and linear frequency modulation (LFM) in low SNR, a novel method is proposed based on the poly-phase filter bank and high-order cumulant. Firstly, it realizes rapid uniform-tivision of signals in the frequency domain by the poly-phase filter bank. Then, the Gaussian noise can be suppressed by using the short-time estimate of the third-order cumulant on each narrow frequency band. The estimation of the whole time-frequency matrices can be obtained with envelope detection. Finally, the chirp rate, the code-width and the code-length of comp-site signal can be estimated by Radon transform of time-frequency images. At the same time, the carrier frequency, the band width, the start-stop frequency can also be estimated by extracting the frequency curves. Simulation results show that all parameters of the compsite signal can be precisely evaluated when SNR is more than -11 dB.关键词
线性调频/伪随机二相编码/多相滤波器/三阶累积量/Radon变换Key words
linear frequency modulation (LFM)/ pseudo-random binary phase code (PRBC)/poly-phase filter/ third-order cumulant/ Radon transform分类
信息技术与安全科学引用本文复制引用
沈伟,赵拥军,刘成城,贾新海..高斯噪声下伪码-线性调频复合信号参数提取方法[J].数据采集与处理,2012,27(4):450-455,6.基金项目
国家高技术研究发展计划(“八六三”计划)(2009AA7034530)资助项目. （“八六三”计划）
