Title :
Analog Chirp Fourier Transform for high-resolution real-time wideband RF spectrum Analysis
Author :
Gangopadhyay, Daibashish ; Chen, Andrew Y. ; Allstot, David J.
Author_Institution :
Dept. of Electr. Eng., Univ. of Washington, Seattle, WA, USA
Abstract :
Application of the Analog Chirp Fourier Transform (ACFT) in generating low-latency, continuous, real-time frequency spectra of wide bandwidth radio frequeny (RF) signals is presented as an alternative to the digital FFT processor. Insights into the mathematical construct of ACFT, system modeling, and practical design considerations are presented. Resolution and worst-case frequency error are key metrics evaluated over design parameter choices and process, voltage, and temperature (PVT)-induced parameter variations. Experiments show accurate frequency spectrum representation over several decades extending from 200 MHz to 6 GHz with a 58 MHz worst-case resolution and 1 μs latency.
Keywords :
chirp modulation; error analysis; fast Fourier transforms; frequency-domain analysis; radio spectrum management; ACFT; analog chirp Fourier transform; digital FFT; frequency 200 MHz to 6 GHz; frequency error; frequency spectrum representation; radio frequeny signals; wideband RF spectrum; Bandwidth; Chirp; Fourier transforms; Radio frequency; Real time systems; Signal resolution; Voltage-controlled oscillators;
Conference_Titel :
Circuits and Systems (ISCAS), 2011 IEEE International Symposium on
Conference_Location :
Rio de Janeiro
Print_ISBN :
978-1-4244-9473-6
Electronic_ISBN :
0271-4302
DOI :
10.1109/ISCAS.2011.5938097
