Method and apparatus for detecting presence or absence of pilot signals in a digital cellular mobilecommunication unit.

    公开(公告)号:HK1055516A1

    公开(公告)日:2004-01-09

    申请号:HK03107654

    申请日:2003-10-23

    Applicant: QUALCOMM INC

    Abstract: The present invention includes a cellular pilot signal detector (210) or searcher for use in a cellular mobile communications unit. The signal detector uses a matched filter (212) to detect a pilot signal transmitted from a cellular base station. The matched filter includes a plurality of taps and a plurality of delays located between adjacent taps. The signal components of a received digital signal are held on the taps of the matched filter by the delays. The matched filter compares the signal components of the received signal to an expected or searched for digital pattern. The matched filter puts out a relatively large signal if the received digital signal matches the expected digital pattern. The matched filter can also be used in parallel with a correlator (216).

    2.
    发明专利
    未知

    公开(公告)号:BR0015954A

    公开(公告)日:2003-07-15

    申请号:BR0015954

    申请日:2000-11-28

    Applicant: QUALCOMM INC

    Abstract: The present invention includes a cellular pilot signal detector (210) or searcher for use in a cellular mobile communications unit. The signal detector uses a matched filter (212) to detect a pilot signal transmitted from a cellular base station. The matched filter includes a plurality of taps and a plurality of delays located between adjacent taps. The signal components of a received digital signal are held on the taps of the matched filter by the delays. The matched filter compares the signal components of the received signal to an expected or searched for digital pattern. The matched filter puts out a relatively large signal if the received digital signal matches the expected digital pattern. The matched filter can also be used in parallel with a correlator (216).

    4.
    发明专利
    未知

    公开(公告)号:ES2158088T3

    公开(公告)日:2001-09-01

    申请号:ES95911058

    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.

    5.
    发明专利
    未知

    公开(公告)号:AT200946T

    公开(公告)日:2001-05-15

    申请号:AT95911058

    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.

    Portable radiotelephone with multiple function power key

    公开(公告)号:ZA981444B

    公开(公告)日:1998-08-21

    申请号:ZA981444

    申请日:1998-02-20

    Applicant: QUALCOMM INC

    Inventor: MALONEY JOHN E

    Abstract: A communication device including a power key located on an outer surface of the housing which may provide multiple functions, but is resistant to initiation of undesired handset functions. Control circuitry within the communication device may be configured to ignore any actuation of the power key with a duration less than a determined time period. The control circuitry performs a first function if the power key is depressed for a first duration, and performs a second function when the power key is depressed for a second duration. For example, depression of the power key for a short period of time may silence and incoming call alert, whereas depression of the power key for a longer period of time will turn the communication device on or off.

    7.
    发明专利
    未知

    公开(公告)号:BR9505674A

    公开(公告)日:1996-01-16

    申请号:BR9505674

    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.

    9.
    发明专利
    未知

    公开(公告)号:AT322792T

    公开(公告)日:2006-04-15

    申请号:AT98908741

    申请日:1998-02-26

    Applicant: QUALCOMM INC

    Inventor: MALONEY JOHN E

    Abstract: A communication device including a power key located on an outer surface of the housing which may provide multiple functions, but is resistant to initiation of undesired handset functions. Control circuitry within the communication device may be configured to ignore any actuation of the power key with a duration less than a determined time period. The control circuitry performs a first function if the power key is depressed for a first duration, and performs a second function when the power key is depressed for a second duration. For example, depression of the power key for a short period of time may silence and incoming call alert, whereas depression of the power key for a longer period of time will turn the communication device on or off.

    Method and apparatus for a pilot search using a matched filter

    公开(公告)号:AU1805401A

    公开(公告)日:2001-06-04

    申请号:AU1805401

    申请日:2000-11-28

    Applicant: QUALCOMM INC

    Abstract: The present invention includes a cellular pilot signal detector (210) or searcher for use in a cellular mobile communications unit. The signal detector uses a matched filter (212) to detect a pilot signal transmitted from a cellular base station. The matched filter includes a plurality of taps and a plurality of delays located between adjacent taps. The signal components of a received digital signal are held on the taps of the matched filter by the delays. The matched filter compares the signal components of the received signal to an expected or searched for digital pattern. The matched filter puts out a relatively large signal if the received digital signal matches the expected digital pattern. The matched filter can also be used in parallel with a correlator (216).

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