Title :
Spread-spectrum synchronizer using a SAW convolver and recirculation loop
Author :
Morgan, David P. ; Hannah, John M. ; Collins, Jeffrey H.
Author_Institution :
University of Edinburgh, Edinburgh, Scotland, U.K.
fDate :
5/1/1976 12:00:00 AM
Abstract :
Segments of a long biphase coded waveform were correlated in a degenerate acoustic convolver, and the resulting correlation peaks were summed in a SAW recirculation loop. Using a 9 Mchip/s wave-form, 730 µs of waveform was correlated, giving an experimental SNR increase of 40 dB. This system can be used to reduce substantially the acquisition time for synchronization of a direct sequence spread-spectrum communication receiver.
Keywords :
Acoustic noise; Acoustic waves; Bandwidth; Convolvers; Delay lines; Matched filters; Signal to noise ratio; Spread spectrum communication; Surface acoustic waves; Timing;
Journal_Title :
Proceedings of the IEEE
DOI :
10.1109/PROC.1976.10204
