Title :
Characterization of instantaneous frequency and glitches of sweeping oscillator and its application to multifrequency estimation
Author :
Li Yan ; Yitang Dai ; Kun Xu ; Yuefeng Ji ; Jintong Lin
Author_Institution :
State Key Lab. of Inf. Photonics & Opt. Commun., Beijing Univ. of Posts & Telecommun., Beijing, China
Abstract :
A novel photonics approach to the characterization of instantaneous frequency and glitches of sweeping oscillators is proposed and demonstrated based on a PRBS frequency comb. The analog sweeps of a vector signal generator, whose sweeping ranges are 0.5 GHz to 2.5 GHz and 2.5 GHz to 5 GHz respectively, are calibrated using the proposed method, and the glitches of sweeping is also identified. The proposed system has the advantages of broad bandwidth, simplified stable implementation and low cost. As an application of the characterized sweeping oscillator, the frequencies of a multi-tone signal are recognized accurately. The detection error is 5 kHz and the separation of the nearest detectable frequencies are 1 MHz.
Keywords :
error detection; frequency estimation; microwave oscillators; microwave photonics; optical signal detection; PRBS frequency comb; analog sweeps; broad bandwidth; characterized sweeping oscillator; detection error; glitches; instantaneous frequency; multifrequency estimation; multitone signal; nearest detectable frequency; photonics approach; simplified stable implementation; sweeping ranges; vector signal generator; Bandwidth; Frequency modulation; Microwave filters; Microwave measurements; Oscillators; Time frequency analysis; calibration; optical signal processing; radio frequency photonics;
Conference_Titel :
Microwave Photonics (MWP), 2012 International Topical Meeting on
Conference_Location :
Noordwijk
Print_ISBN :
978-1-4673-2863-0
DOI :
10.1109/MWP.2012.6474075
