Multigigahertz range-Doppler correlative signal processing in optical memory crystals.
Analog optical signal processing of complex radio-frequency signals for range-Doppler radar information is theoretically described and experimentally demonstrated using crystalline optical memory materials and off-the-shelf photonic components. A model of the range-Doppler processing capability of the memory material for the case of single-target detection is presented. Radarlike signals were emulated and processed by the memory material; they consisted of broadband (> 1 GHz), spread-spectrum, pseudorandom noise sequences of 512 bits in length, which were binary phase-shift keyed on a 1.9 GHz carrier and repeated at 100 kHz over 7.5 ms. Delay (range) resolution of 8 ns and Doppler resolution of 130 Hz over 100 kHz were demonstrated.
Harris
Todd L
TL
Spectrum Laboratory, Box 173510, Montana State University, Bozeman, Montana 59717-3510, USA. todd.harris@sri.com
Merkel
Kristian D
KD
Mohan
R Krishna
RK
Chang
Tiejun
T
Cole
Zachary
Z
Olson
Andy
A
Babbitt
Wm Randall
WR