Motorola Corporation

Stephen H Dunkerton

Gary R Reynolds

Gary D Erickson

Scott G Chapman

David R Petreye

Terence Edward Sumner

John R Melton

A first transmitter (103) reduces an interference in a time division duplex (TDD) communication system (100). The first transmitter (103) alternates from a transmit state in which a first information signal (130) is transmitted to a standby state in which a residual signal (132) is transmitted. The first transmitter (103) includes a transmitter section (142) and a controller (141). The transmitter section (142 transmits the first information signal (130) and the residual signal (132). The transmitter section (142) includes a power amplifier (144) to amplify the first information signal (130) and the residual signal (132) to a power level; and an exciter (143) to control a carrier frequency of the first information signal (130) and the residual signal (132). The controller (141) is coupled to the power amplifier (144) and the exciter (143), for adjusting the power level and setting the carrier frequency.

Method and apparatus for reducing interference in a time division duplex

A paging simulcast station remote control system decoder. The paging system decoder responds to signals generated in accordance with a predetermined signalling scheme comprising a series of tones and timed pauses. The decoder is also responsive to user programmable switches which provide station function tone and sector information. The paging system decoder then selectively deactivates a paging simulcast transmitter in response to signals received through a conventional paging communication link.

Individual simulcast station control decoder

A paging station remote control system decoder is described. The paging system decoder is responsive to signals generated in accordance to a signalling scheme comprising a series of tones and timed pauses generated by a paging system encoder. The paging system decoder then causes a paging transmitter station to key in an analog or binary modulation mode or to switch from one mode to another without first dekeying the paging transmitter.

Paging universal remote control decoder

A paging station remote control system capable of providing analog or binary modulation modes is described. Control of the paging base station is effected through a signalling scheme comprising a combination of tones and timed pauses generated in response to control signals supplied either manually or by a paging terminal. The paging system is capable of transitions between binary and analog modulation modes without first dekeying the paging transmitter.

Paging universal remote control system

A paging simulcast station remote control system encoder is described. The paging system encoder generates signals in accordance with a predetermined signalling scheme comprising a series of tones and timed pauses and generated in response to control signals supplied either manually and or by a paging terminal. The paging system encoder provides control signals which instruct a paging transmitter to transmit a subsequent paging signal or to inhibit transmission until instructed to do otherwise. The paging encoder can generate signals to individually control as many as 30 individual simulcast transmission remote stations through an existing paging RF link.

Individual simulcast transmitter remote control system encoder

A simulcast paging transmitter remote control system capable of individual station control is described. The remote paging transmitter control system comprises an encoder and decoder which interface with a paging terminal and transmitter respectively. The system encoder and decoder communicate through a specifically formatted signalling scheme which is configured to provide station deactivation information as well as conventional paging information.

Individual simulcast station control system

A paging station remote control system encoder is described. The paging system encoder generates signals in accordance with a predetermined signalling scheme comprising a series of tones and timed pauses and generated in response to control signals supplied either manually or by a paging terminal. The paging system encoder provides control signals which instruct a paging transmitter station to key in the analog or binary modulation mode or to switch from one mode to another without first dekeying the paging transmitter.

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Riverwoods, IL, United States of America

Stephen H Dunkerton