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Method for frequency division duplex communications

  • US 7,983,217 B2
  • Filed: 08/15/2008
  • Issued: 07/19/2011
  • Est. Priority Date: 02/06/1997
  • Status: Expired due to Fees
First Claim
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1. An apparatus comprising:

  • a remote unit configured to transmit a signal including a first data signal, the first data signal being allocated to only a first set of a plurality of sets of non-overlapping orthogonal frequency division multiplexed (OFDM) discrete frequency tones in a first frequency band of a plurality of non-overlapping frequency bands of a channel coupled to the remote unit, and in a first set of time intervals, fewer than all time intervals, of a plurality of time intervals of a time division multiple access (TDMA) frame of the channel,wherein the remote unit comprises;

    an encoder configured to encode the first data signal;

    a tone mapping block configured to map the encoded first data signal to the first set of non-overlapping OFDM discrete frequency tones in a frequency domain signal;

    an inverse discrete Fourier transform block configured to transform the frequency domain signal into a digital time domain signal;

    a digital-to-analog converter configured to convert the digital time domain signal into an analog baseband signal;

    a radio frequency (RF) transmitter configured to convert the analog baseband signal into an RF signal; and

    an antenna configured to transmit the RF signal.

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