US3925782A — Adaptive RF power output control for net radios

Claim 1

Independent Claim 346 words

A simplex data net communication system comprised of a plurality of like participant radio stations operating in a predetermined ordered time sequence wherein at least one station operates as a transmitter/interrogator station which interrupts its transmission of communications signals to the other stations of said plurality respectively operating as receiver/responder stations and interrogates said other stations as to the respective power received from said one station and said other stations respond in their proper time slot to said one station requesting a desired change in transmitted power from said one station, each said participant radio station including as a transmitter/interrogator station; transmitter and receiver sections alternately coupled to an antenna; means programmed with data as to the number of said plurality of participants in the net and its respective time slot in the overall operational time sequence of the system; timing and control means coupled to said programmed means and being operable in response to said data to provide synchronized operational control signals for said station according to its respective time slot; means coupling a digital interrogation code signal periOdically to said transmitter section during said respective time slot in response to control signals from said timing and control means while temporarily suspending normal communications signal transmission, said interrogation code signal being transmitted to said other stations causing said other stations to respond in their respective time slot with a digital coded request signal for a power correction from said transmitter/interrogator section; means coupled to said receiver section for sequentially receiving and storing each said digital coded request signal from said other stations; means comparing each digital coded request signal with the next subsequently received digital coded request signal and retaining the request signal for the lesser power correction until all digital coded request signals have been received in sequence from said other stations; and means coupled from said comparing and retaining means to said transmitter section, being operable to cause a change in the transmitted power output of said transmitter section in response to the digital coded request signal for the least power correction change.

Claim 2

Dependent Claim 346 words

A simplex data net communication system comprised of a plurality of like participant radio stations operating in a predetermined ordered time sequence wherein at least one station operates as a transmitter/interrogator station which interrupts its transmission of communications signals to the other stations of said plurality respectively operating as receiver/responder stations and interrogates said other stations as to the respective power received from said one station and said other stations respond in their proper time slot to said one station requesting a desired change in transmitted power from said one station, each said participant radio station including as a transmitter/interrogator station; transmitter and receiver sections alternately coupled to an antenna; means programmed with data as to the number of said plurality of participants in the net and its respective time slot in the overall operational time sequence of the system; timing and control means coupled to said programmed means and being operable in response to said data to provide synchronized operational control signals for said station according to its respective time slot; means coupling a digital interrogation code signal periOdically to said transmitter section during said respective time slot in response to control signals from said timing and control means while temporarily suspending normal communications signal transmission, said interrogation code signal being transmitted to said other stations causing said other stations to respond in their respective time slot with a digital coded request signal for a power correction from said transmitter/interrogator section; means coupled to said receiver section for sequentially receiving and storing each said digital coded request signal from said other stations; means comparing each digital coded request signal with the next subsequently received digital coded request signal and retaining the request signal for the lesser power correction until all digital coded request signals have been received in sequence from said other stations; and means coupled from said comparing and retaining means to said transmitter section, being operable to cause a change in the transmitted power output of said transmitter section in response to the digital coded request signal for the least power correction change.

Claim 3

Dependent Claim 138 words

The communication system as defined by claim 1 and additionally including: means coupled to and responsive to the operation of said transmitter section, providing a first type control signal during the transmitter/interrogator mode and a second type signal during the receiver/responder mode; and wherein said means coupling said interrogation code signal to said transmitter section comprises a digital memory having a fixed interrogation code contained therein and a buffer storage unit coupled to said memory, said memory additionally being coupled to said means providing said first and second type control signals and being responsive to said first type control signal to transfer the fixed interrogation code to said buffer storage and additionally providing an output coupled to said timing and control means for causing the interrogation code to be coupled to said transmitter section from said buffer storage.

Claim 4

Dependent Claim 15 words

The system as defined by claim 2 wherein said memory comprises a read only memory.

Claim 5

Dependent Claim 65 words

The system as defined by claim 2 wherein said transmitter section includes a digital encoder having means for the application of analog input communications signals thereto and means coupled between said digital encoder and said buffer storage, being operable to interrupt the output of the digital encoder at a predetermined time within the respective slot and couple the interrogation code signal to the transmitter section.

Claim 6

Dependent Claim 93 words

The system as defined by claim 2 wherein said means coupled to said receiver section for sequentially receiving and storing digital coded request signals from said other stations includes: digital signal detector means coupled to said receiver section; a digital data storage; and controlled digital data transfer means coupled between said detector means and said digital data storage and being controlled by said means providing said first and second type control signals, being responsive to said first type control signal to couple digital coded request signals from said detector means to said storage.

Claim 7

Dependent Claim 87 words

The system as defined by claim 5 and wherein said means comparing and retaining each digital coded request signal for the least power correction request comprises: a digital comparator circuit coupled to said digital data storage; and a digital memory and a control circuit therefor coupled to said comparator and said data storage, said control circuit being coupled to said timing and control circuit means for operating said memory to read out the request for the least power correction change at the end of a time sequence.

Claim 8

Dependent Claim 55 words

The system as defined by claim 6 wherein said transmitter section includes electrically controlled power amplifier driver circuit means and wherein said means coupled to said transmitter section for changing the transmitted power output comprises a digital to analog converter coupled to and responsive to the output of said last recited memory during read out.

Claim 9

Dependent Claim 144 words

The system as defined by claim 2 and wherein each station includes as a receiver/responder station: power level sensor means coupled to said receiver section for providing a signal indicative of the measure of the received power level transmitted from another transmitter/interrogator station of said plurality of stations; control means coupled between said timing and control means and said power level sensor means for rendering said power level sensor means operative; digital signal generating means coupled to said level sensor providing a digital coded request signal indicative of a desired reduction in power transmission from said another transmitter/interrogator station; and means coupling said digital coded request signal to said transmitter section, said transmitter section becoming operative in response to control signals from said timing and control means during its respective time slot for transmitting said coded request signal back to said another transmitter/interrogator station.

Claim 10

Dependent Claim 92 words

The system as defined by claim 8 wherein said power level sensor means is adapted to provide an analog signal output and, wherein said digital generator means comprises analog-to-digital converter means adapted to provide said digital coded request signal to said transmitter means; and wherein said coupling means comprises a memory including control circuit means coupled to the timing and control means and said buffer storage coupled to the memory, said buffer storage being controlled by said timing and control means to transfer the contents of said memory to said transmitter section.

Claim 11

Dependent Claim 53 words

The system as defined by claim 9 and additionally including, digital signal detector means coupled to said receiver section for detecting a digital communication signal transmitted from said another transmitter/interrogator and providing a digital communications signal output, and digital decoder means coupled to said detector means for providing an analog communication output signal.

Claim 12

Dependent Claim 15 words

The system as defined by claim 10 wherein said digital decoder comprises a digital-to-analog converter.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1978-12-08	1979-06-09	1979-12-09	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1982-12-08	1983-06-09	1983-12-09	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1986-12-08	1987-06-09	1987-12-09	$7700.00	Window Closed / Lapsed

Adaptive RF power output control for net radios

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