REVERSE LINK, TRANSMIT POWER CORRECTION AND LIMITATION IN A RADIOTELEPHONE SYSTEM

    公开(公告)号:CA2275156A1

    公开(公告)日:1995-08-31

    申请号:CA2275156

    申请日:1995-02-17

    Applicant: QUALCOMM INC

    Abstract: The process and apparatus of the present invention limits the output power of a radiotelephone, operating in a cellular system in the preferred embodiment. This ensures the transmitted sidebands and synthesizer phase noise remains within a certain specification. This is accomplished by power detection and a correction accumulator that together, generate a gain control signal by limiting the gain adjustment to a maximum value, even when the cell site communicating with the radiotelephone is sending power turn-up commands to the radiotelephone. This process includes dynamically correcting the output level of the transmitter due to gain variations in the transmitter stages or gain control elements.

    DIFFERENTIATING BETWEEN INPUT RANGES IN A PASSIVE KEYPAD

    公开(公告)号:CA2333003C

    公开(公告)日:2008-01-08

    申请号:CA2333003

    申请日:1999-05-21

    Applicant: QUALCOMM INC

    Abstract: A method and circuit for processing switch closures in a passive network (10 0) having switches (S i ... S n). The passive network (100) generates an output voltage in response to a switch closure. The circu it comprises a comparison circuit (206), coupled to the passive network, for comparing the output voltage to a reference voltage. A decoder (212), coupled to the comparison circuit, decodes the switch closure if the output voltage is within a predetermined range, and does not decode said switch closure if the output voltage is not within the predetermined range. The circuit differentiates between input ranges in a passive network keypad which allows the proper processing of meaningful key presses, while ignoring inadvertent or superfluous key presses, thereby conserving power and processor time.

    DIFERENCIACION DE RANGOS DE ENTRADA EN UN TECLADO PASIVO.

    公开(公告)号:ES2229710T3

    公开(公告)日:2005-04-16

    申请号:ES99924471

    申请日:1999-05-21

    Applicant: QUALCOMM INC

    Abstract: Circuito para procesar cierres de interruptores en una red pasiva que comprende unos interruptores, generando dicha red pasiva una tensión en respuesta al cierre de un interruptor y comprendiendo el circuito: un circuito de comparación (206) acoplado a dicha red pasiva, para comparar dicha tensión con una tensión de referencia, y un decodificador (212) acoplado a dicho circuito de comparación (206), para decodificar dicho cierre de interruptor si dicha tensión se halla dentro de un rango predeterminado, en el que dicho decodificador (212) no decodifica dicho cierre de interruptor si dicha tensión no se halla dentro de dicho rango predeterminado, caracterizado porque se proporciona un interruptor correspondiente a una tecla de encendido, en el que dicho circuito de comparación genera una señal de interrupción para dicho decodificador sólo si dicho interruptor está cerrado.

    36.
    发明专利
    未知

    公开(公告)号:AT277464T

    公开(公告)日:2004-10-15

    申请号:AT93907228

    申请日:1993-03-04

    Applicant: QUALCOMM INC

    Abstract: A system for reducing receiver power consumption in communication system having a transmitter and one or more receivers schedules periodic messages in "slots." Each receiver is assigned a slot during which it monitors the transmissions. The transmitter transmits messages to the receiver only during the assigned slots. The receiver is in an "active state" during its assigned slot. It may remain in the active state after its assigned slot if the message requires the receiver to perform additional actions. During the "inactive state," which is the time period between successive occurrences of its assigned slot, the receiver may perform any action not requiring coordination with the transmitter. It may conserve power during this time by removing power from one or more components such as those used for monitoring the transmissions. At a time during the inactive state shortly before the assigned slot, the receiver applies power to these components and performs initializations. Such initializations may include reacquiring a pilot channel signal to which the receiver may synchronize itself if its timing signals have drifted out of synchronization with those of the transmitter during the preceding inactive state.

    37.
    发明专利
    未知

    公开(公告)号:FI112564B

    公开(公告)日:2003-12-15

    申请号:FI955072

    申请日:1995-10-25

    Applicant: QUALCOMM INC

    Abstract: The process and apparatus of the present invention limits the output power of a radiotelephone, operating in a cellular system in the preferred embodiment. This ensures the transmitted sidebands and synthesizer phase noise remains within a certain specification. This is accomplished by power detection and a correction accumulator that together generate a gain control signal by limiting the gain adjustment to a maximum value, even when the cell site communicating with the radiotelephone is sending power turn-up commands to the radiotelephone. This process includes dynamically correcting the output level of the transmitter due to gain variations in the transmitter stages or gain control elements.

    Apparatus and method for reducing power consumption in a mobile communications receiver.

    公开(公告)号:HK1015209A1

    公开(公告)日:1999-10-08

    申请号:HK98116167

    申请日:1998-12-28

    Applicant: QUALCOMM INC

    Abstract: A system for reducing receiver power consumption in communication system having a transmitter and one or more receivers schedules periodic messages in "slots." Each receiver is assigned a slot during which it monitors the transmissions. The transmitter transmits messages to the receiver only during the assigned slots. The receiver is in an "active state" during its assigned slot. It may remain in the active state after its assigned slot if the message requires the receiver to perform additional actions. During the "inactive state," which is the time period between successive occurrences of its assigned slot, the receiver may perform any action not requiring coordination with the transmitter. It may conserve power during this time by removing power from one or more components such as those used for monitoring the transmissions. At a time during the inactive state shortly before the assigned slot, the receiver applies power to these components and performs initializations. Such initializations may include reacquiring a pilot channel signal to which the receiver may synchronize itself if its timing signals have drifted out of synchronization with those of the transmitter during the preceding inactive state.

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