A Spectrum-Compressed Digital Receiving Method Using Laguerre Transformation for LFM Signal
基于Laguerre变换的宽带LFM信号频谱压缩数字接收方法

This paper proposes a novel spectrum-compressed digital receiving method using Lagnerre transformation for LFM signal. Firstly, the frequency-warped characteristic of Laguerre transformation and its spectrum-compressed characteristic for LFM signal are discussed. Then, the spectrum-compressed network with variable compression degree is constructed by utilizing the digital structure of Laguerre transformation to keep the signal bandwidth within the receiver bandwidth, which reduces the amount of data to be processed in baseband. The spectrum-compressed signal can be reconstructed by using the spectrum-reconstructed network. The modulation rate and initial frequency of the spectrum-reconstructed LFM signal can be estimated precisely. Finally, the simulation results show the correctness and validity of the method.