Title :
Parameter estimation of LFM signal based on CAPON and one-dimensional Dechirp
Author :
Xiaobei Xu ; Fangfang Fan ; Baolong Cao ; Songqi Cui ; Fei Zhang ; Zhuo Wang
Author_Institution :
Sch. of Inf. & Electron., Beijing Inst. of Technol., Beijing, China
Abstract :
A parameter estimation algorithm of linear frequency modulation (LFM) signal with high precision is presented here. It is firstly based on FFT and CAPON method for estimating the frequency, and then the frequency rate is estimated by using Dechirp which only searches in the frequency rate plane by DFT at the frequency estimate value. The algorithm consists of a coarse search and a fine search to reduce the computation load. Simulation results show that the mean-square error (MSE) of the estimator is practically equal to the Cramer-Rao lower bound (CRLB) for all signal-to-noise ratio (SNR) above -7 dB.
Keywords :
fast Fourier transforms; frequency modulation; mean square error methods; parameter estimation; signal processing; CAPON; Cramer Rao lower bound; DFT; FFT; LFM signal; frequency estimate value; frequency rate plane; linear frequency modulation signal; mean square error; one dimensional Dechirp; parameter estimation; Accuracy; Estimation; Frequency conversion; Frequency estimation; Frequency modulation; Signal to noise ratio; CAPON; Dechirp; linear frequency modulation; parameter estimation;
Conference_Titel :
TENCON 2013 - 2013 IEEE Region 10 Conference (31194)
Conference_Location :
Xi´an
Print_ISBN :
978-1-4799-2825-5
DOI :
10.1109/TENCON.2013.6718903
