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Antenna selecting diversity receiving apparatus

  • US 5,241,701 A
  • Filed: 04/26/1991
  • Issued: 08/31/1993
  • Est. Priority Date: 08/01/1990
  • Status: Expired due to Term
First Claim
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1. An antenna selecting diversity receiving apparatus for use in a time-division multiplexing radio communication system which uses a linear modulating wave, for selecting one of a plurality of antennas which receives a strongest electric field, and to connect the antenna thus selected to a radio receiver through an antenna switching circuit, said apparatus comprising:

  • an integrating circuit for respectively integrating electric field levels received by each of said plurality of antennas before a start point of a time slot allotted to said radio receiver, for a predetermined period of time and for outputting the time-integrated electric field level values therefrom;

    a comparing circuit for making a comparison among the respective time-integrated values form said integrating circuit, corresponding to each of said plurality of antennas; and

    a changeover control circuit for selecting an antenna corresponding to the maximum time-integrated value based on the result of comparison by said comparing circuit by controlling said antenna switching circuit to connect the antenna thus selected to said radio receiver during a period of said allotted time slot.

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