Title :
Precision Broadband RF Signal Recovery in Subsampled Analog Optical Links
Author :
Harmon, Sharon R. ; McKinney, Jason D.
Author_Institution :
Sotera Defense Solutions, Inc., Herndon, VA, USA
Abstract :
We present a novel technique for ultrawideband RF disambiguation where we are able to determine the precise Nyquist band from which an optically sampled, and therefore downconverted signal originated. This is accomplished by applying a discrete perturbation to the sampling rate, and measuring the magnitude and direction of the shift in signal location within the fundamental Nyquist band. Once the Nyquist band has been determined, the exact signal frequency can also be recovered. We demonstrate extremely accurate multioctave signal recovery over 1 MHz-40 GHz.
Keywords :
microwave photonics; optical communication equipment; optical information processing; optical links; signal sampling; discrete perturbation; downconverted signal; frequency 1 MHz to 40 GHz; fundamental Nyquist band; multioctave signal recovery; precision broadband RF signal recovery; sampling rate; shift direction; shift magnitude; signal frequency; signal location; subsampled analog optical links; ultrawideband RF disambiguation; Frequency modulation; Optical fiber communication; Optical receivers; Photonics; Radio frequency; Time-frequency analysis; Microwave photonics; broadband; disambiguation; multi-octave; optical subsampling; ultra-wideband;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2014.2386657
