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Communication apparatus and communication method for inverse discrete-fourier-transforming a frequency domain signal into a time domain symbol sequence

  • US 9,516,648 B2
  • Filed: 12/22/2015
  • Issued: 12/06/2016
  • Est. Priority Date: 09/22/2008
  • Status: Active Grant
First Claim
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1. A communication apparatus comprising:

  • a receiver which receives signals mapped on a plurality of frequency bands in a frequency domain, each frequency band including a plurality of subcarriers, each frequency band being located at a position separate from position(s) of other(s) of the plurality of frequency bands, and a size of at least one of the plurality of frequency bands being a multiple of a product of two or more powers of prime numbers, the prime numbers being integer numbers that are greater than 1 and are different from each other, an exponent for at least one of the prime numbers being an integer greater than 1;

    a combiner which combines the received signals into a combined signal; and

    a transformer which transforms the combined signal in the frequency domain into a symbol sequence in a time domain with an inverse discrete Fourier transform (IDFT) having a size that is a product of powers of a plurality of values, the plurality of values being integer numbers that are greater than 1 and are different from each other, an exponent for at least one of the plurality of values being an integer greater than 1.

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