US Patent No. 10,484,994

APPARATUS AND METHOD FOR TRANSFORMING A SIGNAL IN A FREQUENCY DOMAIN TO A SEQUENCE IN A TIME DOMAIN


Patent No. 10,484,994
Issue Date November 19, 2019
Title Apparatus And Method For Transforming A Signal In A Frequency Domain To A Sequence In A Time Domain
Inventorship Shinsuke Takaoka, Osaka (JP)
Masayuki Hoshino, Kanagawa (JP)
Kenichi Miyoshi, Kanagawa (JP)
Assignee Sun Patent Trust, New York, NY (US)

Claim of US Patent No. 10,484,994

10. A communication method performed by a communication apparatus comprising:receiving signals mapped on a plurality of frequency bands in a frequency domain, each frequency band being located at a position separate from position(s) of other(s) of the plurality of frequency bands, wherein vector lengths corresponding to sizes of the plurality of frequency bands are each a product of two or more powers of prime numbers or a multiple of the product of the two or more powers of prime numbers, the prime numbers being integer numbers that are greater than 1 and are different from each other, exponents for the prime numbers being a set of non-negative integers, wherein the vector length is a number of subcarriers allocated to a corresponding one of the plurality of frequency bands;
combining the received signals into a combined signal; and
transforming 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, exponents for the plurality of values being a set of non-negative integers.