Title :
Time Delay Estimation Based on the Fractional Fourier Transform in the Passive System
Author :
Li, Xue Mei ; Tao, Ran ; Wang, Yue
Author_Institution :
Sch. of Inf. & Electron., BIT, Beijing, China
Abstract :
The time delay estimation between two signals in the passive system has been an important issue. In this paper, we propose a new time delay estimator based on the delay property of the fractional Fourier transform (FRFT). It is suitable for chirp signals in the passive system. The time delay is evaluated in the fractional Fourier domain by measuring the time differential between the time delays obtained from the two peak values of the fractional spectra of the received signals. Simulation results show that the proposed time delay method performs better than the conventional cross correlation approach at low signal-to-noise (SNR).
Keywords :
Fourier transforms; delay estimation; passive networks; signal processing; chirp signals; delay property; fractional Fourier transform; fractional spectra; passive system; time delay estimation; time delays; Chirp; Delay effects; Delay estimation; Fourier transforms; Narrowband; Optical signal processing; Radar applications; Radar tracking; Signal processing; Time measurement;
Conference_Titel :
Image and Signal Processing, 2009. CISP '09. 2nd International Congress on
Conference_Location :
Tianjin
Print_ISBN :
978-1-4244-4129-7
Electronic_ISBN :
978-1-4244-4131-0
DOI :
10.1109/CISP.2009.5302590
