Parameter estimation of signals with linear frequency modulation based on digital adaptive filtering

 

 D. S. Marychev, O. A. Morozov, S. L. Khmelev

Applied-Physics Research Institute of Nizhny Novgorod State University

 Received February 28, 2012

 

Abstract. Parameter estimation method for signals with linear frequency modulation was introduced. Basis of this method is digital filter with adaptive parameters operating like a phase locked loop (PLL). Some recommendations related to the proper choice of adaptive algorithm parameters were presented. Algorithm of estimation parameters and classification of signals with linear frequency modulation was introduced. Results of the study of frequency recovery quality depending on magnitude of signal to noise ratio (SNR) were presented.

Keywords: linear frequency modulation, phase locked loop, linear filtering.