Pulse or digital communications – Receivers – Automatic frequency control
Patent
1995-04-21
1997-12-16
Ghebretinsae, T.
Pulse or digital communications
Receivers
Automatic frequency control
375326, 375329, 4551641, H04L 2706
Patent
active
056993854
ABSTRACT:
In a receiver for receiving a carrier modulated with data, there is provided a system for locating and tracking said carrier. The carrier is located by sweeping a frequency range containing said carrier. False lockup are inherent when a wide frequency sweep demodulator attempts to lock onto a carrier, and the system recognizes such lockups by monitoring data from a Viterbi error correction circuit. On false lockup, the system breaks the lockup and continues the sweep until the true data carrier is located and tracked.
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Requirements and Method for High-level Multiplexing of MPEG and Other Digital Service Bistreams With Universal Transport Layer; International Orginization For Standardization, Organisation Internationale De Normalisation; Nov. 1992; pp. 1-27.
D'Sylva Mark J.
Lawrence Steven
Strother-Stewart Robert
Ghebretinsae T.
Scientific-Atlanta, Inc.
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