中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

8 records (took 0.021 seconds)

    Adaptive antenna array and method of controlling operation thereof
    2.
    发明专利
    Adaptive antenna array and method of controlling operation thereof 未知

    公开(公告)号：GB2363256B

    公开(公告)日：2004-05-12

    申请号：GB0013735

    申请日：2000-06-07

    Applicant: MOTOROLA INC

    Inventor： OWEN RAYMOND

    IPC: H04B7/10 ,  G01S3/46 ,  H01Q3/26 ,  H04B7/06 ,  H04B7/26

    Abstract: An adaptive antenna array (14) includes a multiplicity of antenna elements (12a-12k, 48a-48k) responsive to uplink communications (16a-16k) and arranged to support directional-orientated downlink communication to subscriber units (18). The adaptive antenna array (14) is operationally responsive to a signal processor (28) that co-operates with direction of arrival estimation logic (36) to assess an angle of arrival of uplink communications incident to the array. To avoid inter-cell interference, especially during early stages of a call, the signal processor operates to ensure that a wide area downlink beam (108) is provided for a downlink path to an addressed subscriber unit. With time and/or with reported (68, 84) downlink quality of service (QoS) metrics, the signal processor (28) regulates (74, 92, 96) a width of the downlink beam by altering the number of antenna elements used to support the downlink beam, thereby altering the downlink beam aperture. Generally, with time, more antenna elements (92) are used and so the beam is narrowed, although in-call fluctuations in downlink quality of service are dynamically addressed by the signal processor (28) by either narrowing or broadening the width of the downlink beam by respectively switching antenna elements (12a-12k, 48a-48k) into (92) or out (96) of the adaptive antenna array (14), as shown in FIGs. 3a and 3b.

    Adaptive antenna array and method of controlling operation thereof
    3.
    发明专利
    Adaptive antenna array and method of controlling operation thereof 未知

    公开(公告)号：GB2363256A

    公开(公告)日：2001-12-12

    申请号：GB0013735

    申请日：2000-06-07

    Applicant: MOTOROLA INC

    Inventor： OWEN RAYMOND

    IPC: H04B7/10 ,  G01S3/46 ,  H01Q3/26 ,  H04B7/06 ,  H04B7/26

    Abstract: An adaptive antenna array 14 includes a plurality of antenna elements 12a-12k, 48a-48k responsive to uplink communications 16a-16k and arranged to support directional-orientated downlink communication to subscriber units 18. The adaptive antenna array 14 is operationally responsive to a signal processor 28 co-operates with direction of arrival estimation logic 36 to assess an angle of arrival of uplink communications incident to the array. To avoid inter-cell interference, especially during early stages of a call, the signal processor operates to ensure that a wide area downlink beam (fig. 4 108) is provided for a downlink path to an addressed subscriber unit. With time and/or with reported downlink quality of service metrics, the signal processor 28 regulates a width of the downlink beam by altering the number of antenna elements used to support the downlink beam, thereby altering the downlink beam aperture. Generally, with time, more antenna elements are used and so the beam is narrowed, although in-call fluctuations in downlink quality of service are dynamically addressed by the signal processor 28 by either narrowing or broadening the width of the downlink beam by respectively switching antenna elements 12a-12k, 48a-48k into or out of the adaptive antenna array 14.

    Controlling power transmission settings within a second air interface based on inferred propagtion conditions from those assessed in a first air interface
    4.
    发明专利
    Controlling power transmission settings within a second air interface based on inferred propagtion conditions from those assessed in a first air interface 未知

    公开(公告)号：GB2362785A

    公开(公告)日：2001-11-28

    申请号：GB0013051

    申请日：2000-05-27

    Applicant: MOTOROLA INC

    Inventor： OWEN RAYMOND ,  ANDERSON NICHOLAS WILLIAM ,  BENN HOWARD

    IPC: H04B7/005 ,  H04L12/56 ,  H04W16/14 ,  H04W24/00 ,  H04W52/16 ,  H04W52/22 ,  H04W52/24

    Abstract: A communication system (10, 68) includes a plurality of different, spectrally separated air-interfaces providing different services from co-located base sites (70-76). One of these air-interfaces, which may be CDMA, operates a universal frequency-re-use pattern across multiple cells (80, 88, 90), whereas other air-interfaces, such as GSM, have carrier frequencies that have a cell re-use pattern. A subscriber unit (12-16) within the system (10, 68) monitors an interference environment and path loss of at least some of the various different services to infer propagation conditions that are likely to be experienced within a spread spectrum service supported by the universal frequency re-use pattern. Armed with an assessment of a fade (82-86) condition within the system as a whole, implied by time and path loss from broadcast signals from different services, the subscriber unit can regulate and control its power transmission. Spread spectrum communication to a distant base station can be safe in the knowledge that high power transmissions from the subscriber are subject to deep fade when viewed by near-in base sites. Near-far problems associated with high power transmissions to near-in base sites can therefore be mitigated based on a level of confidence that is found in the fade condition determined by path loss in services ancillary to the spread spectrum service.

    A user terminal ranks a base station depending upon a computed virtual estimate of a characteristic of a received communication signal.
    8.
    发明专利
    A user terminal ranks a base station depending upon a computed virtual estimate of a characteristic of a received communication signal. 未知

    公开(公告)号：GB2364207A

    公开(公告)日：2002-01-16

    申请号：GB0015977

    申请日：2000-06-30

    Applicant: MOTOROLA INC

    Inventor： JONES PHILIP EDWIN ,  OWEN RAYMOND ,  DA SILVA JOAO

    IPC: H04W36/08 ,  H04W36/38 ,  H04W48/06 ,  H04Q7/38

    Abstract: A user terminal ranks a base station depending upon a computed virtual estimate of a characteristic of a received communication signal. Overloaded base stations 2,3,4 in a cellular communications network are moved down in the active sets of mobile terminals 1 by applying an offset to the received pilot power estimates. An overloaded base station will transmit a high offset value to a terminal 1, causing it to be moved down in the active set, thereby discouraging the terminal from requesting access or handover to such base station. The user terminal comprises means for receiving a communication signal from at least one base station and for computing an estimate of a characteristic of the received communication signal, means for receiving a communication signal degradation value associated with said at least one base station, means for comparing the estimate with the degradation value and for computing a virtual estimate from the comparison and means for ranking said base station depending upon the value of the computed virtual estimate.

Patent Agency Ranking