电讯技术Issue(10)：1360-1365,6.DOI:10.3969/j.issn.1001-893x.2014.10.009
低信噪比下LFM- PRBC信号参数的快速估计
Fast Parameter Estimation of LFM-PRBC Signal under Low SNR
刘勇 1张国毅 1胡鑫磊 1王晓峰2
作者信息
- 1. 空军航空大学 信息对抗系，长春130022
- 2. 海军航空工程学院 电子信息工程系，山东 烟台264001
- 折叠
摘要
Abstract
To solve the problem that the parameter estimation of linear frequency modulation-pseudo ran-dom binary codes( LFM-PRBC) signal requires a large amount of computation in current algorithms,a fast parameter estimation algorithm which uses dechirp and fractional Fourier transform( FRFT) is proposed. Firstly,the dechirp is used to obtain the rough estimation of chirp rate which can determine the angle of ro-tation, and the rough estimation of symbol width is achieved by FRFT. And then,the exact value of chirp rate is estimated from the second dechirp based on the delay of the signal. Finally,through the second FR-FT the exact value of symbol width and the initial frequency are obtained. The proposed algorithm has not only low computation complexity but also high estimation accuracy and strong ability of immunity to noise. The effectiveness of this algorithm is verified by simulation.关键词
线性调频-伪码信号/参数估计/分数阶傅里叶变换/解线调Key words
LFM-PRBC signal/parameter estimation/fractional Fourier transform/dechirp分类
信息技术与安全科学引用本文复制引用
刘勇,张国毅,胡鑫磊,王晓峰..低信噪比下LFM- PRBC信号参数的快速估计[J].电讯技术,2014,(10):1360-1365,6.
