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    3.
    发明专利
    未知

    公开(公告)号：DE69912734D1

    公开(公告)日：2003-12-18

    申请号：DE69912734

    申请日：1999-03-12

    Applicant: MOTOROLA INC

    Inventor： BOIXADERA ESPAX FRANCESC ,  FARMINE YANN ,  WHINNETT NICHOLAS

    IPC: H01Q3/26 ,  H04B7/06 ,  H04B7/26 ,  H04J11/00 ,  H04L1/06 ,  H04L27/26 ,  H04B1/00 ,  H04B7/00

    Abstract: Antenna weights for a transmit path (3) between two communication devices (1, 2), the first device (1) having an antenna array (4, 5, 6) are generated in the second device (2) and fed hack to weighting circuitry (9, 10, 11, 12) in the first device (1). The invention is particularly applicable to multicarrier systems such as OFDM systems. Only weights for those sub-carriers identified as being received with comparatively poor signal quality are calculated and fed back to the first device (1), thus limiting the additional overhead requirements to a minimum.

    4.
    发明专利
    未知

    公开(公告)号：AT358924T

    公开(公告)日：2007-04-15

    申请号：AT98401461

    申请日：1998-06-15

    Applicant: MOTOROLA INC

    Inventor： BOIXADERA ESPAX FRANCESC ,  FARMINE YANN ,  WHINNETT NICHOLAS

    IPC: H04B7/06 ,  H04B7/208 ,  H04L1/00 ,  H04L1/06 ,  H04Q7/38 ,  H04L1/12 ,  H04B7/08

    Abstract: A method of improving capacity in a duplexing scheme is provided. The duplexing scheme has a first band of frequencies and a second band of frequencies. The method comprises the steps of: determining an amount of available capacity on the first band of frequencies (steps 402, 404, 410), transmitting, on the first band of frequencies, a variable amount of feedback data corresponding to the amount of available capacity on the first band of frequencies, the feedback data comprising data for improving the quality of communications on the second band of frequencies, and optimising (steps 406, 408, 412, 414) transmissions on the second band of frequencies using, when available, the feedback data.

    6.
    发明专利
    未知

    公开(公告)号：DE69912734T2

    公开(公告)日：2004-05-27

    申请号：DE69912734

    申请日：1999-03-12

    Applicant: MOTOROLA INC

    Inventor： BOIXADERA ESPAX FRANCESC ,  FARMINE YANN ,  WHINNETT NICHOLAS

    IPC: H01Q3/26 ,  H04B7/06 ,  H04B7/26 ,  H04J11/00 ,  H04L1/06 ,  H04L27/26 ,  H04B1/00 ,  H04B7/00

    Abstract: Antenna weights for a transmit path (3) between two communication devices (1, 2), the first device (1) having an antenna array (4, 5, 6) are generated in the second device (2) and fed hack to weighting circuitry (9, 10, 11, 12) in the first device (1). The invention is particularly applicable to multicarrier systems such as OFDM systems. Only weights for those sub-carriers identified as being received with comparatively poor signal quality are calculated and fed back to the first device (1), thus limiting the additional overhead requirements to a minimum.

    8.
    发明专利
    未知

    公开(公告)号：ES2212484T3

    公开(公告)日：2004-07-16

    申请号：ES99400609

    申请日：1999-03-12

    Applicant: MOTOROLA INC

    Inventor： BOIXADERA ESPAX FRANCESC ,  FARMINE YANN ,  WHINNETT NICHOLAS

    IPC: H01Q3/26 ,  H04B7/06 ,  H04B7/26 ,  H04J11/00 ,  H04L1/06 ,  H04L27/26 ,  H04B1/00 ,  H04B7/00

    Abstract: Antenna weights for a transmit path (3) between two communication devices (1, 2), the first device (1) having an antenna array (4, 5, 6) are generated in the second device (2) and fed hack to weighting circuitry (9, 10, 11, 12) in the first device (1). The invention is particularly applicable to multicarrier systems such as OFDM systems. Only weights for those sub-carriers identified as being received with comparatively poor signal quality are calculated and fed back to the first device (1), thus limiting the additional overhead requirements to a minimum.

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