Interwave Communications International Ltd.

Gas Research Institute

International Communications International, Ltd.

Gerald F Sage

Ian L Sayers

Priscilla Marilyn Lu

Timothy Richard White

David A Chavez

Gurbux S Msutta

A base station communicates with a plurality of mobile stations over a cellular network. In one embodiment, the base station includes a transceiver configured to receive inbound information from the mobile station and transmit outbound information to the mobile station. The transceiver equalizes and decodes the inbound information and encodes the outbound information. The transceiver is coupled to a data bus for communicating the inbound and outbound information with the other elements in the base station. The transceiver is also coupled to a control bus. An trunk module is coupled to the data bus and to a mobile services center. The trunk module communicates inbound and outbound information with the mobile services center. The trunk module is also coupled to the control bus. Finally, a central processor is coupled to the control bus to control the transceiver and the trunk module. A preferred protocol is Global Systems for Mobile Communication (GSM).

Cellular base station with intelligent call routing

A multiple antenna cellular network communicates with a mobile station over a plurality of antennas. The antennas are arranged in a plurality of positions to customize a cell or cells. A transceiver is coupled to the antennas and configured to receive inbound information from the mobile station and transmit outbound information to the mobile station. A processor is coupled to the transceiver and configured to decode the inbound information and to encode the outbound information to communicate with the mobile station. In another embodiment, the transmit signal power is continuously modified to move interference nulls to improve quality so that a fixed location user can receive a high quality signal. Exemplary embodiments are provided for use with the Global Systems for Mobile Communication (GSM) protocol and can be applied to other digital technologies.

Multiple antenna cellular network

A multiple antenna cellular network communicates with a mobile station over a plurality of antennas. The antennas are arranged in a plurality of positions to customize a cell or cells. A transceiver is coupled to the antennas and configured to receive inbound information from the mobile station and transmit outbound information to the mobile station. A processor is coupled to the transceiver and configured to decode the inbound information and to encode the outbound information to communicate with the mobile station. In another embodiment, the antennas are similarly deployed to create a cell or cells. The transmit signal power is continuously modified to improve quality and to move the nulls so that a fixed location user can receive a high quality signal. Exemplary embodiments are provided for use with the Global Systems for Mobile Communication (GSM) protocol and can be applied to other digital technologies.

A base station communicates with a plurality of mobile stations over a cellular network. In one embodiment, the base station includes a receiver having a receiver synthesizer input, where the receiver is configured to receive inbound information from the mobile station on a first predetermined frequency. The receiver further has two programmable frequency sources that are configured to alternately supply a receiver synthesizer input signal to the receiver. The base station also includes a transmitter having a transmitter synthesizer input, where the transmitter is configured to transmit outbound information to the mobile station on a second predetermined frequency. The transmitter further has two programmable frequency sources that are configured to alternately supply a transmitter synthesizer input signal to the transmitter. A processor is connected to the receiver and the transmitter and is configured to decode the inbound information and to encode the outbound information to communicate with the mobile station. This two-way communication continues by programming and then alternately selecting the receive synthesizers to receive on the correct frequency, and by programming and then alternately selecting the transmit synthesizers to transmit on the correct frequency. A preferred protocol is Global Systems for Mobile Communication (GSM).

Frequency agile transceiver with multiple frequency synthesizers per

A measuring system for use in an emissions monitor and comprising a control mechanism (12) and a sensor mechanism (14). The control mechanism (12) means a differential current passing through an active resistive temperature device RTD (34) with respect to the current flowing through a reference RTD (36) when the sensor mechanism (14) is exposed to a particular gas of interest. The differential current is detected by control mechanism (12) via a four winding transformer (32) having an active winding (A), a reference winding (R), a sense winding (S), and a zero winding (Z). The current delivered to the active RTD (34) passes through the active winding (A) while the current passing through the reference RTD (36) passes through the reference winding (R) so as to produce a differential flux in the core of the transformer (32). The differential flux is detected by the sense winding (S) and is converted into a voltage signal by a current-to-voltage convertor (42). The voltage signal is subsequently converted by an analog-to-digital convertor (44) into a digital signal that is processed by a processor (48). The processor (48) applies a PID algorithm to the digital values in order to derive a control signal proportional to the concentration of the particular gas detected by the sensor mechanism (14). The control signal is combined with the excitation signal generated by the oscillator (20) at a multiplying DAC (28) in order to generate a precision zero signal which is sent to the zero winding (Z) in order to cancel the flux detected by sense winding (S).

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Mountain View, CA, United States of America

Gerald F Sage