Pulse or digital communications – Spread spectrum – Direct sequence
Patent
1982-07-02
1984-07-03
Griffin, Robert L.
Pulse or digital communications
Spread spectrum
Direct sequence
375 81, 375 82, H04L 2700
Patent
active
044583567
ABSTRACT:
A carrier recovery circuit is disclosed for use in the receiver of a digital transmission wherein channels of data are formed by demodulating incoming quadrature-related carriers using receiver-generated, quadrature-related carriers. Phase alignment of the receiver-generated carriers to the incoming carriers is provided by integrated data from a preselected channel when the channels of data correspond to preselected regions in the signal space diagram.
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Horikawa et al., "16 QAM Carrier Recovery with Selective Gated Phase Locked Loop," The Transactions of the IECE of Japan, vol. E63, No. 7, Abstracts, Jul., 1980, pp. 548-549.
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Bell Telephone Laboratories Incorporated
Griffin Robert L.
Padnes David R.
Watkins Albert W.
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