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Land-based wireless communications system having a scanned directional antenna

  • US 5,488,737 A
  • Filed: 11/17/1992
  • Issued: 01/30/1996
  • Est. Priority Date: 11/17/1992
  • Status: Expired due to Term
First Claim
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1. A radio communications system, comprising:

  • one or more remote stations, each of said remote stations comprising means for transmitting an identifying signal pattern and message information within a frequency band;

    a base station for transmitting and receiving signals to and from said remote stations, said base station comprising at least one receiving antenna coupled to a base station receiver which monitors said frequency band, said at least one receive antenna having a directional pattern in a horizontal plane and means for scanning said directional pattern azimuthally;

    means for filtering a signal received at said at least one receive antennameans for processing said receive signal after filtering by said filtering means, said processing means comprising means for decoding information which is included in said received signals;

    means for monitoring a signal strength of said received signal; and

    means for controlling said scanning means;

    wherein said decoding means comprises means for decoding said identifying signal pattern, said system further comprising;

    means for determining if said identifying signal pattern has been correctly decoded; and

    means for decoding remaining portions of said received signal and forwarding a corresponding message to a network, if it is determined by said determining means that said identifying signal pattern has been correctly decoded;

    said means for controlling said scanning means further comprising means for instructing said scanning means to move said directional pattern from one azimuthal position to another if said identifying signal pattern has not been correctly decoded.

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