摘要
对色噪声背景下LFM信号(线性调频信号)进行了分析,提出了一种基于二次型变换的互谱ESPR IT方法。该方法首先对LFM信号进行二次型变换转化为平稳信号,再将现代互谱理论引入ESPR IT方法生成互谱ESPR IT方法来进行后续的信号处理,成功地实现了高效率、高精度的参数估计,且使附加的有色噪声信噪比低至-5 dB。仿真试验结果证明了本文方法的正确性和有效性。
By analyzing the LFM signal in colored noise, a cross-spectral ESPRIT method based on quadratic form transformation was proposed. The method converts the nonstationary LFM signal into a stationary signal, then modern cross-spectral estimation theory was employed by the ESPRIT method to accomplish the following signal processing achieving high efficiency and high precision estimation. The SNR of the additive colored noise can drop to -5 dB. The validity and effectiveness of the proposed method are verified by simulation results.
出处
《吉林大学学报（工学版）》
EI
CAS
CSCD
北大核心
2005年第5期551-555,共5页
Journal of Jilin University:Engineering and Technology Edition
基金
吉林省科技厅自然科学基金资助项目(20030519).
