Pulse or digital communications – Spread spectrum – Direct sequence
Patent
1979-05-03
1982-06-08
Curtis, Marshall M.
Pulse or digital communications
Spread spectrum
Direct sequence
375106, 455 65, H04B 704, G01S 506
Patent
active
043343147
ABSTRACT:
The invention relates to the radio-electrical transmission of accurate timing-mark signals. A space-diversity electrical connection is formed between a station having one single antenna and a station having two antennae and one of the stations is equipped with a receiver device which combines into one composite timing-mark signal the different repetitive timing-marks decoded and rectified from high-frequency signals which have traversed several spatial propagation paths. A common automatic gain control circuit weights the decoded and rectified timing marks according to a weighting which diminishes with the level of high frequency reception. Preferably the rectification of the timing marks is carried out non-linearly.
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Elements of the ATA Collision Avoidance System; Shear IEEE Trans. on Aeroce & Electronic Systems; VolAES-4, #2; pp. 295-304, 3/68.
Bourasseau Daniel J. E.
Nard Georges P.
Rabian Jean M.
Curtis Marshall M.
Societe d'Etudes, Recherches et Construction Electroniques Serce
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