Motorola Corporation

Leonard Wayne Bennett

Kenneth Charles Elkin

Craig J Christmas

Robert Mark Gorday

Gregory O Snowden

Stuart S Kreitzer

Ralph W Andrea, Iii

William W O'Connor

A method of producing a receive signal quality estimate in a subscriber unit (SU) located in a given geographic area covered by a wireless communication system of a kind in which a base station transmits downlink signals in a group of successive time frames directed to a set of geographic areas including an area in which the SU is located, wherein each of the group of successive time frames has signals aimed at a corresponding one of the set of geographic areas. The method comprises the steps of activating a receiver in the SU to listen over a determined listening interval that at least partly coincides with the group of successive time frames; measuring a signal strength of at least one downlink signal received by the SU receiver during the determined listening interval within one of, a time frame of the group of successive time frames corresponding to a geographic area in which the SU is located, and one other time frame of the group of successive time frames corresponding to a geographic area other than the geographic area in which the SU is located; and producing an estimate of receive signal quality at the SU according to a result of the measuring step.

Receive signal quality estimates suitable for pagers used in

Application of power to a transmitter in a messaging device is preceded by measuring a quality of at least one base station down-link signal received by a receiver in the device, and producing a transmit threshold signal when the measured signal quality corresponds to a substantial likelihood of accurate detection by a base station of an up-link signal to be transmitted from the device. The device transmitter is powered on only if the transmit threshold signal is present over a given interval prior to a transmitter operation. Thus, a relatively low-power battery and small antenna can be used effectively by the device, and its overall size kept at a minimum.

Two-way pager with transmit threshold

In a mobile repeater system there can be two priority repeaters at two adjacent locations which are out of range of each other, but not out of range of each other's portable units. Reception of a tone coded signal from a portable raises the squelch threshold in both repeaters, thus decreasing the portable-to-repeater range without decreasing the repeater-to-repeater range. Interferences caused by simultaneous transmission is eliminated since only the appropriate repeater is activated.

Dual threshold repeater squelch circuit

Growing community of inventors

Plantation, FL, United States of America

Leonard Wayne Bennett