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Pro-active antenna switching based on relative power

  • US 6,891,909 B2
  • Filed: 02/28/2001
  • Issued: 05/10/2005
  • Est. Priority Date: 02/28/2001
  • Status: Expired due to Fees
First Claim
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1. A method of wireless communication, comprising the following steps:

  • (a) acquiring first through N-th packets of data at a remote site;

    (b) transmitting said N packets of data from an antenna at said remote site in the form of modulated signals, each modulated signal having a bit pattern dictated by the acquired data;

    (c) receiving at least portions of said modulated signals of said N packets of data in first and second antenna fields;

    (d) demodulating said portions of said modulated signals of said N packets of data detected in said first antenna field;

    (e) after transmitting said N-th packet of data, transmitting an (N+1)-th packet from said antenna at said remote site, said (N+1)-th packet being transmitted in the form of a modulated signal having a known bit pattern not dictated by the acquired data;

    (f) receiving at least a portion of said modulated signal of said (N+1)-th packet in said first antenna field;

    (g) calculating the power of said modulated signal of said (N+1)-th packet from said first antenna field;

    (h) after transmitting said (N+1)-th packet, transmitting an (N+2)-th packet from said antenna at said remote site, said (N+2)-th packet being transmitted in the form of a modulated signal having a known bit pattern not dictated by the acquired data;

    (i) receiving at least a portion of said modulated signal of said (N+2)-th packet in said second antenna field;

    (j) calculating the power of said modulated signal of said (N+2)-th packet from said second antenna field; and

    (k) selecting one of said first and second antenna fields to provide detected modulated signals for demodulating subsequent to transmission of said (N+2)-th packet, the results of said selecting step being a function of the results of said calculating steps.

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