Dual mode radio transceiver for an SSB communication system
First Claim
1. A dual-mode remote radio station for use in a radio communication system, having a primary station and at least one remote station, said primary and remote stations capable of operating on a plurality of radio frequency channels, said remote station comprising:
- a receiver means for receiving signals including;
means for selectively receiving one of either;
(a) voice messages transmitted on a first type of modulation within a first channel of said plurality of channels, said first channel having a predetermined channel bandwidth;
or(b) a first set of data messages carrying information from said primary station to said remote stations identifying said first channel of said plurality of channels, said first set of data messages transmitted continuously by a second type of modulation within a second channel of said plurality of channels, said second channel having a predetermined channel bandwidth being no wider than said first channel bandwidth; and
control means for automatically controlling said receiver means such that said voice messages are received from said first channel in response to information derived from said first set of data messages received from said second channel.
0 Assignments
0 Petitions
Accused Products
Abstract
A radio transceiver is disclosed for use in an SSB communication system having FM data capability. The dual-mode radio transceiver of the present invention includes a receiver capable of demodulating and deriving AFC from either (a) the voice channel having voice messages transmitted via single sideband amplitude modulation with a pilot carrier, or (b) the data channel having high speed data messages transmitted via narrowband frequency modulation in the same channel bandwidth. Furthermore, the dual-mode radio transceiver includes a transmitter capable of transmitting one of either of the above types of modulation on the appropriate channel, as determined by information received from the high speed data messages transmitted on the control channel.
-
Citations
40 Claims
-
1. A dual-mode remote radio station for use in a radio communication system, having a primary station and at least one remote station, said primary and remote stations capable of operating on a plurality of radio frequency channels, said remote station comprising:
-
a receiver means for receiving signals including; means for selectively receiving one of either; (a) voice messages transmitted on a first type of modulation within a first channel of said plurality of channels, said first channel having a predetermined channel bandwidth;
or(b) a first set of data messages carrying information from said primary station to said remote stations identifying said first channel of said plurality of channels, said first set of data messages transmitted continuously by a second type of modulation within a second channel of said plurality of channels, said second channel having a predetermined channel bandwidth being no wider than said first channel bandwidth; and control means for automatically controlling said receiver means such that said voice messages are received from said first channel in response to information derived from said first set of data messages received from said second channel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A dual-mode radio station for use in a radio communications system having a primary station and at least one remote station, said primary and remote stations capable of operating on a plurality of radio frequency channels, said remote station comprising:
-
a receiver including; means for selectively receiving one of either; (a) voice messages transmitted via a first type of modulation on a first radio frequency (RF) carrier within a first channel of said plurality of channels, said first channel having a predetermined channel bandwidth; and (b) a first set of data messages carrying information from said primary station to said remote stations identifying said first channel of said plurality of channels, said first set of data messages continuously transmitted by a second type of modulation on a second RF carrier within a second channel of said plurality of channels, said second channel having a predetermined channel bandwidth being no wide than said first channel bandwidth;
orfrequency generating means for providing a receiver injection signal to said receiving means, said frequency generating means having automatic frequency control (AFC) means for selectively deriving an AFC signal from one of said first and said second RF carriers. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
-
-
19. A dual-mode radio transceiver for use as a remote station in a radio communications system having a primary station and a plurality of remote stations, said primary and remote stations capable of transmitting and receiving voice and data signals over any one of a plurality of communications channels said radio transceiver comprising:
-
a receiver for receiving signals including; means for receiving a first set of data messages from said primary station having information identifying a channel of a plurality of channels on which voice signals are carried, said data messages being transmitted continuously within a first channel of said plurality of channels, said first channel having a predetermined channel bandwidth; and a transmitter means for transmitting signals including; means for selectively transmitting one of either; (a) voice messages via a first type of modulation within a second channel of said plurality of channels, said second channel having a channel bandwidth being no wider than said first channel bandwidth;
or(b) a second set of data messages having information identifying said second channel of said plurality of channels via a second type of modulation within a third channel of said plurality of channels, said third channel having a channel bandwidth being no wider than said first channel bandwidth; and control means for automatically controlling said transmitting means such that said voice messages are transmitted on to the second channel in response to information derived from said first set of data messages received from said first channel. - View Dependent Claims (20, 21, 22, 23, 24, 25)
-
-
26. A dual-mode radio receiver capable of receiving voice and data signals over any one of a plurality of radio frequency (RF) channels, said radio receiver comprising:
-
frequency generating means for generating a receiver injection signal in response to a channel selection signal and an automatic frequency control (AFC) signal; control means for providing said channel selection signal to said frequency generating means; means, responsive to said receiver injection signal, for receiving a first radio frequency (RF) carrier on a first RF channel having single sideband (SSB) amplitude modulation (AM); means, responsive to said receiver injection signal, for receiving a second RF carrier on a second RF channel having narrowband frequency modulation (FM) with an order frequency; and AFC means for providing said AFC signal to said frequency generating means by tracking the frequency of one of said first and second RF carriers. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
-
Specification