Spread-spectrum synchronizer using a SAW convolver and recirculation loop

1 May 1976

journal article
Published by Institute of Electrical and Electronics Engineers (IEEE) in Proceedings of the IEEE

Vol. 64 (5) , 751-753
https://doi.org/10.1109/PROC.1976.10204

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

SPREAD SPECTRUM COMMUNICATION
SURFACE ACOUSTIC WAVES
CONVOLVERS
DELAY LINES
TIMING
MATCHED FILTERS
ACOUSTIC WAVES
SIGNAL TO NOISE RATIO
ACOUSTIC NOISE
BANDWIDTH

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