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DURATION-SHORTENED OFDM SYMBOLS

  • US 20090185476A1
  • Filed: 01/15/2009
  • Published: 07/23/2009
  • Est. Priority Date: 01/16/2008
  • Status: Abandoned Application
First Claim
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1. A method of operating a communications network comprising a base station and a wireless terminal which communicate a frame of information over an air interface with the base station, the method comprising:

  • preparing or processing the frame in a manner whereby;

    (1) at least some of OFDM symbols of the frame have a symbol duration Tbase in accordance with a base frequency 1/Tbase of subcarriers employed for the frame;

    (2) at least one duration-shortened OFDM symbol of the frame has a symbol duration Tbase/N, wherein N is an integer greater than one and wherein a subset of subcarriers are utilized for the select OFDM symbol, the subset of subcarriers being frequencies which are integer multiples of a Nth harmonic of the base frequency 1/Tbase; and

    transmitting the frame over the interface.

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