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Radio communication system capable of carrying out a data transmission with a high reliability

  • US 5,930,235 A
  • Filed: 02/28/1997
  • Issued: 07/27/1999
  • Est. Priority Date: 02/29/1996
  • Status: Expired due to Fees
First Claim
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1. A radio communication system comprises a master station for carrying out a bidirectional communication between said master station and a slave station in time division multiple access, said master station transmitting a master transmission signal having a master frame signal to said slave station, said slave station transmitting a slave transmission signal having a slave frame signal to said master station, wherein:

  • said master station comprises;

    master comparator means for comparing said slave frame signal with said master frame signal to produce a phase difference between said slave frame signal and said master frame signal as phase difference data;

    first detecting means for detecting a field strength level in accordance with said slave transmission signal to judge whether or not said field strength level is less than a predetermined level, said first detecting means producing a field detection signal representative of detection of a field strength as a first detection signal when said field strength level is not less than said predetermined level, said first detecting means producing a non-field detection signal representative of no detection of said field strength as said first detection signal when said field strength level is less that said predetermined level; and

    master transmitting means for transmitting, to said slave station, said phase difference data and said first detection signal carried on said master transmission signal;

    said slave station comprising;

    delay means for delaying said slave transmission signal in accordance with a given phase difference; and

    supplying means responsive to said first detection signal for selectively supplying said delay means with said phase difference data as said given phase difference.

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