中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

190 records (took 0.027 seconds)

    132.
    发明专利
    未知

    公开(公告)号：AT438986T

    公开(公告)日：2009-08-15

    申请号：AT04788888

    申请日：2004-09-21

    Applicant: QUALCOMM INC

    Inventor： JALALI AHMAD

    IPC: H04L12/56 ,  H04J11/00 ,  H04J13/00 ,  H04J13/18 ,  H04L12/24 ,  H04W28/14 ,  H04W28/22 ,  H04W28/26 ,  H04W72/02 ,  H04W74/08 ,  H04W84/06

    Abstract: In a code division multiple access (CDMA) communications system including one or more terminals (such as customer premise equipments, CPEs) that communicate with a node (such as an Internet gateway) via at least a random access channel and a reservation-oriented channel, various schemes of managing communications traffic among the channels are provided. Decisions as to the channel on which a given terminal may transmit may be based on: traffic statistics (such as packet size or average data rate over a time period), traffic content (such as packet type), the terminal's output buffer loading (queue state, or “Q-state”), a history of the terminal's output buffer loading (one or more Q-states), and so forth. In one application, decisions in managing traffic in a live user's web browsing sessions may involve intelligent ascertainment of whether a given terminal is busy based on traffic analysis or output buffer loading.

    133.
    发明专利
    未知

    公开(公告)号：AT434868T

    公开(公告)日：2009-07-15

    申请号：AT02736691

    申请日：2002-05-07

    Applicant: QUALCOMM INC

    Inventor： JALALI AHMAD

    IPC: H04B7/00 ,  H04B7/26 ,  H04B7/04 ,  H04B7/10 ,  H04W16/00 ,  H04W72/08

    Abstract: According to a disclosed embodiment, a first plurality of pilot signals of a first polarization is received and ranked. Subsequently, a second plurality of pilot signals of a second polarization is received and ranked. Following, a pilot signal from the first and second pluralities of pilot signals is selected based on a signal quality measurement such as a signal to interference ratio. Moreover, a system can be constructed comprising antennas configured to receive pilot signals of a first and a second polarization. The system further comprises a receiver configured to demodulate the pilot signals and a CPU configured to rank the pilot signals and to select a pilot signal based on a signal quality measurement. Communication quality is improved by communicating with the base transceiver station transmitting the pilot signal providing the highest signal quality measurement.

    Suppressing cross-polarization interference in an orthogonal communication link
    134.
    发明专利
    Suppressing cross-polarization interference in an orthogonal communication link 未知

    公开(公告)号：AU2005216343B2

    公开(公告)日：2009-03-05

    申请号：AU2005216343

    申请日：2005-02-25

    Applicant: QUALCOMM INC

    Inventor： JALALI AHMAD ,  CHAKRAVARTY SUMANTRA ,  SCHIFF LEONARD NORMAN

    IPC: H04B7/14 ,  H04B1/707 ,  H04B7/216 ,  H04J11/00 ,  H04J13/00

    Abstract: An OCDMA transmission arrangement involves encoding both first and second nominally orthogonal polarization signals with a same long code, and transmitting the long-encoded first and second nominally orthogonal polarization signals from respective first and second transmission sources to at least one destination. A corresponding OCDMA demodulating arrangement demodulates the first and second nominally orthogonal polarization signals that were transmitted from respective first and second transmission sources after having been encoded with the same long code. The demodulation arrangement involves receiving the encoded first and second nominally orthogonal polarization signals, and applying the same long code to the received encoded first and second nominally orthogonal polarization signals.

    Managing traffic in communications system having dissimilar CDMA channels
    135.
    发明专利
    Managing traffic in communications system having dissimilar CDMA channels 未知

    公开(公告)号：AU2008261159A1

    公开(公告)日：2009-01-15

    申请号：AU2008261159

    申请日：2008-12-22

    Applicant: QUALCOMM INC

    Inventor： JALALI AHMAD

    IPC: H04L12/24 ,  H04J11/00 ,  H04J13/00 ,  H04J13/18 ,  H04L12/56 ,  H04W28/14 ,  H04W28/22 ,  H04W28/26 ,  H04W72/02 ,  H04W74/08 ,  H04W84/06

    Abstract: In a code division multiple access (CDMA) communications system including one or more terminals (such as customer premise equipments, CPEs) that communicate with a node (such as an Internet gateway) via at least a random access channel and a reservation-oriented channel, various schemes of managing communications traffic among the channels are provided. Decisions as to the channel on which a given terminal may transmit may be based on: traffic statistics (such as packet size or average data rate over a time period), traffic content (such as packet type), the terminal's output buffer loading (queue state, or “Q-state”), a history of the terminal's output buffer loading (one or more Q-states), and so forth. In one application, decisions in managing traffic in a live user's web browsing sessions may involve intelligent ascertainment of whether a given terminal is busy based on traffic analysis or output buffer loading.

    136.
    发明专利
    未知

    公开(公告)号：DE60135228D1

    公开(公告)日：2008-09-18

    申请号：DE60135228

    申请日：2001-07-17

    Applicant: QUALCOMM INC

    Inventor： SMEE JOHN E ,  JALALI AHMAD

    IPC: H04B1/7115 ,  H04B3/06 ,  H04B7/005 ,  H04B7/08 ,  H04L25/03

    Abstract: In a method for achieving higher S/N, one or more signals are received and processed to provide one or more streams of samples. In a first processing scheme, the sample stream(s) are equalized and combined within an equalizer to generate symbol estimates, which maybe subsequently processed (e.g. despread and decovered) to provide a first stream of recovered symbols. The sample stream(s) may be equalized prior to being combined. In this case, each sample stream is filtered with a set of coefficients and may be scaled with a scaling factor. The scaled samples for all streams are then combined to generate the symbol estimates. Alternatively, the sample stream(s) may be combined prior to being equalized. In this case, each sample stream is scaled by a scaling factor. The scaled samples for all streams are then combined to generate summed samples that are further filtered with a set of coefficients to generate the symbol estimates. The sample stream(s) may also be processed by a second processing scheme with one or more rake receivers to provide a second stream of recovered symbols. The signal quality for each processing scheme can be estimated and used to select either the first or second processing scheme.

    137.
    发明专利
    未知

    公开(公告)号：AT403977T

    公开(公告)日：2008-08-15

    申请号：AT01953551

    申请日：2001-07-17

    Applicant: QUALCOMM INC

    Inventor： SMEE JOHN E ,  JALALI AHMAD

    IPC: H04B1/7115 ,  H04B3/06 ,  H04B7/005 ,  H04B7/08 ,  H04L25/03

    Abstract: In a method for achieving higher S/N, one or more signals are received and processed to provide one or more streams of samples. In a first processing scheme, the sample stream(s) are equalized and combined within an equalizer to generate symbol estimates, which maybe subsequently processed (e.g. despread and decovered) to provide a first stream of recovered symbols. The sample stream(s) may be equalized prior to being combined. In this case, each sample stream is filtered with a set of coefficients and may be scaled with a scaling factor. The scaled samples for all streams are then combined to generate the symbol estimates. Alternatively, the sample stream(s) may be combined prior to being equalized. In this case, each sample stream is scaled by a scaling factor. The scaled samples for all streams are then combined to generate summed samples that are further filtered with a set of coefficients to generate the symbol estimates. The sample stream(s) may also be processed by a second processing scheme with one or more rake receivers to provide a second stream of recovered symbols. The signal quality for each processing scheme can be estimated and used to select either the first or second processing scheme.

    METHOD AND APPARATUS FOR BEAMFORMING IN A WIRELESS COMMUNICATION SYSTEM
    138.
    发明专利
    METHOD AND APPARATUS FOR BEAMFORMING IN A WIRELESS COMMUNICATION SYSTEM 未知

    公开(公告)号：HK1109519A1

    公开(公告)日：2008-06-06

    申请号：HK08100156

    申请日：2008-01-07

    Applicant: QUALCOMM INC

    Inventor： JALALI AHMAD

    IPC: H04B7/26 ,  H04B20060101 ,  H04B7/06

    Abstract: In a CDMA data communication system capable of variable rate transmission, utilization of beamforming techniques decreases the average interference caused by transmissions of a base station (104) to subscriber stations (112) in neighboring cells (124). Base stations (102, 104) utilize multiple transmit antennas (106, 108), each transmitting signals at controlled phases, to form transmit signal beams (110, 118, 122) corresponding to individual subscriber stations (112, 116, 114). Data and reference signals are transmitted along beams (110, 118, 122) that change according to fixed time slots and subslots in order to maximize carrier-to-interference ratios (C/I) measured at subscriber stations (112, 116, 114).

Patent Agency Ranking