Integrated circuit that transforms a symbol in a time domain into a signal in a frequency domain
First Claim
1. An integrated circuit comprising:
- circuitry which, in operation;
transforms a symbol in a time domain into a signal in a frequency domain with a DFT 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;
maps the signal in the frequency domain on a plurality of frequency bands, 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 being different from each other, exponents for the prime numbers being a set of non-negative integers; and
generates a single carrier-frequency division multiple access (SC-FDMA) signal in the time domain from the mapped signal; and
at least one output coupled to the circuitry, which, in operation, outputs data.
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Abstract
A communication apparatus includes a receiver, a combiner, and a transformer. The receiver receives signals mapped on plural frequency bands. A size of at least one of the frequency bands is a multiple of a product of two or more powers of prime numbers, which are integer numbers greater than 1 and are different from each other. An exponent for at least one of the prime numbers is an integer greater than 1. The combiner combines the received signals into a combined signal. The transformer transforms the combined signal in a 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 plural values. The values are integer numbers greater than 1 and are different from each other. An exponent for at least one of the values is an integer greater than 1.
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Citations
7 Claims
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1. An integrated circuit comprising:
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circuitry which, in operation; transforms a symbol in a time domain into a signal in a frequency domain with a DFT 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; maps the signal in the frequency domain on a plurality of frequency bands, 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 being different from each other, exponents for the prime numbers being a set of non-negative integers; and generates a single carrier-frequency division multiple access (SC-FDMA) signal in the time domain from the mapped signal; and at least one output coupled to the circuitry, which, in operation, outputs data. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification