Digital communication signalling system
First Claim
1. A method of transmission in a communication system from a radio transmitter that communicates digital information to a radio receiver, comprising the steps of:
- generating a message frame having a format comprising;
(i) a field enabling carrier frequency change and(ii) at least one data field for the digital information, said at least one data field comprising;
(a) a transmitter ramp-up field,(b) a first unsynchronized signal overlap detection field,(c) a synchronization field,(d) a field containing the digital information, and(e) a second unsynchronized signal overlap detection field; and
transmitting said generated message frame.
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Accused Products
Abstract
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.
64 Citations
45 Claims
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1. A method of transmission in a communication system from a radio transmitter that communicates digital information to a radio receiver, comprising the steps of:
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generating a message frame having a format comprising; (i) a field enabling carrier frequency change and (ii) at least one data field for the digital information, said at least one data field comprising; (a) a transmitter ramp-up field, (b) a first unsynchronized signal overlap detection field, (c) a synchronization field, (d) a field containing the digital information, and (e) a second unsynchronized signal overlap detection field; and transmitting said generated message frame. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of transmission in a communication system from a radio transmitter that communicates digital information to a radio receiver, comprising the steps of:
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generating a message frame having a format comprising; (i) a field enabling carrier frequency change and (ii) at least one data field for the digital information, said at least one data field comprising; (a) a transmitter ramp-up field, (b) a first unsynchronized signal overlap detection field, (c) a synchronization field, (d) an inband signalling field, (e) a field containing the digital information, and (f) a second unsynchronized signal overlap detection field; and transmitting said generated message frame. - View Dependent Claims (9, 10)
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11. A method of transmission in a communication system from a radio transmitter that communicates digital information to a radio receiver, comprising the steps of:
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generating a message frame having a format comprising; (i) a field enabling carrier frequency change and (ii) at least one data field for the digital information, said at least one data field comprising; (a) a transmitter ramp-up field and (b) a field containing the digital information; and transmitting said generated message frame. - View Dependent Claims (12, 13, 14)
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15. A communication system with a radio transmitter that communicates digital information to a radio receiver, the communication system comprising:
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means for generating a message frame having a format comprising; (i) a field enabling carrier frequency change and (ii) at least one data field for the digital information, said at least one data field comprising; (a) a transmitter ramp-up field, (b) a first unsynchronized signal overlap detection field, (c) a synchronization field, (d) a field containing the digital information, and (e) a second unsynchronized signal overlap detection field; and means for transmiting said generated message frame. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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22. A communication system with a radio transmitter that communicates digital information to a radio receiver, the communication system comprising:
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means for generating a message frame having a format comprising; (i) a field enabling carrier frequency change and (ii) at least one data field for the digital information, said at least one data field comprising; (a) a transmitter ramp-up field, (b) a first unsynchronized signal overlap detection field, (c) a synchronization field, (d) an inband signalling field, (e) a field containing the digital information, and (f) a second unsynchronized signal overlap detection field; and means for transmitting said generated message frame. - View Dependent Claims (23, 24)
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25. A communication system with a ratio transmitter that communicates digital information to a radio receiver, the communication system comprising:
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means for generating a message frame having a format comprising; (i) a field enabling carrier frequency change and (ii) at least one data field for the digital information, said at least one data field comprising; (a) a transmitter ramp-up field and (b) a field containing the digital information; and means for transmitting said generated message frame. - View Dependent Claims (26, 27, 28)
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29. 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:
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means for synthesizing at least one transmitter carrier frequency; means for processing the digital information; means, coupled to said means for processing, for generating a message frame having a format comprising; (i) a field enabling said at least one carrier frequency to change and (ii) at least one data field for the digital information, said at least one data field comprising; (a) a transmitter ramp-up field, (b) a first unsynchronized signal overlap detection field, (c) a synchronization field, (d) a field containing the digital information, and (e) a second unsynchronized signal overlap detection field; and means for transmitting said generated message frame. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36)
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37. A communication unit with a radio transmitter that communicates digital information to a radio receiver, the communication system comprising:
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means for synthesizing at least one transmitter carrier frequency; means for processing the digital information; means, coupled to said means for processing, for generating a message frame having a format comprising; (i) a field enabling said at least one carrier frequency to change and (ii) at least one data field for the digital information, said at least one data field comprising; (a) a transmitter ramp-up field, (b) a first unsynchronized signal overlap detection field, (c) a synchronization field, (d) an inband signalling field, (e) a field containing the digital information, and (f) a second unsynchronized signal overlap detection field; and means for transmitting said generated message frame. - View Dependent Claims (38, 39, 40)
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41. A communication unit with a radio transmitter that communicates digital information to a radio receiver, the communication system comprising:
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means for synthesizing at least one transmitter carrier frequency; means for processing the digital information; means, coupled to said means for processing, for generating a message frame having a format comprising; (i) a field enabling said at least one carrier frequency to change and (ii) at least one data field for the digital information, said at least one data field comprising; (a) a transmitter ramp-up field and (b) a field containing the digital information; and means for transmitting said generated message frame. - View Dependent Claims (42, 43, 44, 45)
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Specification