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US 5,212,715 AGranted
Digital communication signalling system
AssigneeMotorola, Inc.
InventorsWilliam F. Pickert, James A. McDonald, Thomas A. Sexton, Charles J. Malek
Life of this patent
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AssigneeMotorola, Inc.
InventorsWilliam F. Pickert, James A. McDonald, Thomas A. Sexton, Charles J. Malek
Estimating the term…
In frequency-hopping spread-spectrum systems, it is necessary to maintain frequency and bit synchronization (sync) between the transmitter and receiver in order to maintain quality data recovery at the receiver. A protocol is described which includes a synthesizer lock field (109) to allow frequency sync, a clock sync field (123) to achieve quick clock sync, and a data sync field (125) to provide data sync. Other fields are provided in the protocol to allow both voice (141) and data (127) transmissions, inband signalling (139), and error correction (143). A method and apparatus, driven by a microprocessor (303) and ASIC (301) combination, are described that generate and transmit this protocol.
A method of transmission in a communication system from a radio transmitter that communicates digital information to a radio receiver, comprising the steps of:
A method of transmission in a communication system from a radio transmitter that communicates digital information to a radio receiver, comprising the steps of:
A method of transmission in a communication system from a radio transmitter that communicates digital information to a radio receiver, comprising the steps of:
A communication system with a radio transmitter that communicates digital information to a radio receiver, the communication system comprising:
A communication system with a radio transmitter that communicates digital information to a radio receiver, the communication system comprising:
A communication system with a ratio transmitter that communicates digital information to a radio receiver, the communication system comprising:
A communication unit for use in a communication system with a ratio transmitter that communicates digital information to a radio receiver, the communication unit comprising:
A communication unit with a radio transmitter that communicates digital information to a radio receiver, the communication system comprising:
A communication unit with a radio transmitter that communicates digital information to a radio receiver, the communication system comprising:
Dependencies are inferred from the claim text.