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    62.
    发明专利
    未知

    公开(公告)号：DE60322025D1

    公开(公告)日：2008-08-21

    申请号：DE60322025

    申请日：2003-02-19

    Applicant: QUALCOMM INC

    Inventor： MEDVEDEV IRINA ,  WALTON JAY R ,  KETCHUM JOHN W

    IPC: H04B7/005 ,  H04J99/00 ,  H04B7/04 ,  H04B7/06 ,  H04L1/00 ,  H04L1/06

    Abstract: Techniques for controlling the transmit power for a number of data streams in a wireless multi-channel (e.g., MIMO) communication system. In one method, a number of received symbol streams are initially processed in accordance with a particular (e.g., CCMI, CCMISC, MMSE, or MMSE-SC) receiver processing technique to provide a number of detected data streams. The post-detection SNRs of the detected data streams are estimated, and each SNR that exceeds a setpoint is identified. This setpoint may correspond to (1) the SNR needed to achieve the maximum allowed spectral efficiency or (2) the target SNR needed to achieve a specified spectral efficiency. A new (or adjusted) transmit power for each detected data stream associated with a post-detection SNR that exceeds the setpoint is determined and used for the data stream. Different power control schemes are provided for different classes of receiver processing techniques with different characteristics.

    ОБРОБКА ПРОСТОРОВОГО РОЗНЕСЕННЯ ДЛЯ БАГАТОАНТЕННОЇ КОМУНІКАЦІЙНОЇ СИСТЕМИ
    63.
    发明专利
    ОБРОБКА ПРОСТОРОВОГО РОЗНЕСЕННЯ ДЛЯ БАГАТОАНТЕННОЇ КОМУНІКАЦІЙНОЇ СИСТЕМИ 未知

    公开(公告)号：UA83473C2

    公开(公告)日：2008-07-25

    申请号：UAA200504964

    申请日：2003-10-27

    Applicant: QUALCOMM INC

    Inventor： WALTON JAY R ,  KETCHUM JOHN W ,  WALLACE MARK ,  HOWARD STEPHAN J

    IPC: H04L1/02 ,  H04B7/005 ,  H04B7/06 ,  H04B7/08 ,  H04J99/00 ,  H04L1/00 ,  H04L1/06 ,  H04L1/08 ,  H04L1/16 ,  H04L12/28 ,  H04L12/56 ,  H04L25/02 ,  H04L25/03 ,  H04L27/26 ,  H04W28/20 ,  H04W52/50

    Abstract: Дляпросторовогорознесенняв багатоантенній OFDM системіпередавачвиконуєкодування, перемежовуванняі відображеннясимволівдляданихтрафікадляотриманнясимволівданих. Передавачобробляєкожнупарусимволівданихдляотриманнядвохпарсимволів, щопередаютьсядляпередачічерезпаруантенабо (1) вдвохперіодахсимволу OFDM дляпросторово-часовогорознесенняприпередачі, або (2) вдвохпіддіапазонахдляпросторово-частотногорознесенняприпередачі. Дляпередачіданихвикористовують NT(NT-l)/2 різнихпарантен, причомурізніпариантенвикористовуютьдлясуміжнихпіддіапазонів, іде NT являєсобоюкількістьантен. Системаможепідтримуватимножинурозмірівсимволів OFDM. Длярізнихрозмірівсимволів OFDM використовуютьоднаковісхемикодування, перемежовуванняі модуляціїдляспрощенняобробкив передавачіі приймачі. Передавачвиконуємодуляцію OFDM дляпотокусимволів, щопередаютьсядлякожноїантенизгідноз вибранимрозміромсимволу OFDM. Приймачвиконуєкомпліментарнуобробку.

    65.
    发明专利
    未知

    公开(公告)号：DE60220783T2

    公开(公告)日：2008-03-06

    申请号：DE60220783

    申请日：2002-05-15

    Applicant: QUALCOMM INC

    Inventor： WALTON JAY R ,  WALLACE MARK ,  HOWARD STEVEN J

    IPC: H04L1/06 ,  H04B7/04 ,  H04B7/06 ,  H04J99/00 ,  H04L1/00 ,  H04W16/00 ,  H04W16/28 ,  H04W84/14

    Abstract: Techniques to schedule downlink data transmission to a number of terminals in a wireless communication system. In one method, one or more sets of terminals are formed for possible data transmission, with each set including a unique combination of one or more terminals and corresponding to a hypothesis to be evaluated. One or more sub-hypotheses may further be formed for each hypothesis, with each sub-hypothesis corresponding to specific assignments of a number of transmit antennas to the one or more terminals in the hypothesis. The performance of each sub-hypothesis is then evaluated, and one of the evaluated sub-hypotheses is selected based on their performance. The terminal(s) in the selected sub-hypothesis are then scheduled for data transmission, and data is thereafter coded, modulated, and transmitted to each scheduled terminal from one or more transmit antenna assigned to the terminal.

    66.
    发明专利
    未知

    公开(公告)号：BR0213913A

    公开(公告)日：2005-04-26

    申请号：BR0213913

    申请日：2002-11-05

    Applicant: QUALCOMM INC

    Inventor： WALTON JAY R ,  WALLACE MARK ,  HOWARD STEVEN J

    IPC: H04J99/00 ,  H04B7/04 ,  H04B7/06 ,  H04B7/08 ,  H04J11/00 ,  H04L1/00 ,  H04L1/06

    Abstract: Techniques to achieve better utilization of the available resources and robust performance for the downlink and uplink in a multiple-access MIMO system. Techniques are provided to adaptively process data prior to transmission, based on channel state information, to more closely match the data transmission to the capacity of the channel. Various receiver processing techniques are provided to process a data transmission received via multiple antennas at a receiver unit. Adaptive reuse schemes and power back-off are also provided to operate the cells in the system in a manner to further increase the spectral efficiency of the system (e.g., reduce interference, improve coverage, and attain high throughput). Techniques are provided to efficiently schedule data transmission on the downlink and uplink. The scheduling schemes may be designed to optimize transmissions (e.g., maximize throughput) for single or multiple terminals in a manner to meet various constraints and requirements.

    Method and apparatus for processing data in a multiple-input multiple-output (mimo) communication system utilizing channel state information
    67.
    发明专利
    Method and apparatus for processing data in a multiple-input multiple-output (mimo) communication system utilizing channel state information 未知

    公开(公告)号：HK1066937A1

    公开(公告)日：2005-04-01

    申请号：HK04109633

    申请日：2004-12-06

    Applicant: QUALCOMM INC

    Inventor： WALTON JAY R ,  WALLACE MARK ,  KETCHUM JOHN W ,  HOWARD STEVEN J

    IPC: H04J99/00 ,  H04B7/06 ,  H04B7/08 ,  H04B7/12 ,  H04L20060101 ,  H04L1/00

    Abstract: Techniques to 'successively' process received signals at a receiver unit in a MIMO system to recover transmitted data, and to 'adaptively' process data at a transmitter unit based on channel state information available for the MIMO channel. A successive cancellation receiver processing technique is used to process the received signals and performs a number of iterations to provide decoded data streams. For each iteration, input (e.g., received) signals for the iteration are processed to provide one or more symbol streams. One of the symbol streams is selected and processed to provide a decoded data stream. The interference due to the decoded data stream is approximately removed (i.e., canceled) from the input signals provided to the next iteration. The channel characteristics are estimated and reported back to the transmitter system and used to adjust (i.e., adapt) the processing (e.g., coding, modulation, and so on) of data prior to transmission.

    69.
    发明专利
    未知

    公开(公告)号：BR0213781A

    公开(公告)日：2004-10-13

    申请号：BR0213781

    申请日：2002-10-31

    Applicant: QUALCOMM INC

    Inventor： WALTON JAY R ,  KETCHUM JOHN W ,  HOWARD STEVEN J ,  WALLACE MARK

    IPC: H04J11/00 ,  H04L1/00 ,  H04Q7/38 ,  H04L27/26

    Abstract: Techniques to adaptively control the rate of a data transmission in a wireless (e.g., OFDM) communication system. In an aspect, various types of metrics may be derived and used to select the proper rate for the data transmission. Some types of metrics relate to different characteristics of the communication channel, such as SNR, frequency selectivity, time selectivity, and so on. One type of metric relates to the performance of the data transmission. In another aspect, the various types of metrics may be used in different manners to adaptively control the rate. Some metrics may be used for open-loop control of the rate, other metrics may be used for closed-loop control, and some may be used for both. For example, the channel metrics may be used to determine or select the rate, and the performance metrics may be used to determine whether or not to adjust the rate.

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