Single carrier frequency division multiple access technique
AssigneeTelefonaktiebolaget L M Ericsson (publ)
InventorsDietmar Lipka, Steffen Reinhardt, Stefan Mueller-Weinfurtner
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Abstract
A technique for generating a single carrier frequency division multiple access (SC-FDMA) signal is described, in which from a set of M input symbols a set of N output symbols (M<N) is generated. A method implementation of this technique comprises receiving a set of M input symbols in a time domain representation, subjecting the set of M input symbols to an interpolation operation in the time domain to obtain L interpolated samples (L≦N), mapping the interpolated symbols, or symbols derived from the interpolated symbols, to N orthogonal sub-carriers, and outputting N output symbols in a time domain representation.
Claims25
A method of generating a single carrier frequency division multiple access (SC-FDMA) signal, wherein from a set of M input symbols, a set of N output symbols is generated, with M<N, the method comprising:
- receiving a set of M input symbols in a time domain representation;
- subjecting the set of M input symbols to a first interpolation operation in the time domain to obtain L interpolated symbols, with L<=N, wherein each interpolated symbol is calculated from K input symbols, with K<=M;
- mapping the L interpolated symbols, or symbols derived from the L interpolated symbols, to N orthogonal sub-carriers;
- and
- outputting a set of N output symbols in a time domain representation.
A single carrier frequency division multiple access (SC-FDMA) modulator adapted to generate from a set of M input symbols received in a time domain representation, a set of N output symbols, with M<N, the modulator comprising:
- an interpolator adapted to subject the set of M input symbols to a first interpolation operation in the time domain to obtain L interpolated symbols, with L<=N, wherein each interpolated symbol is calculated from K input symbols, with K<=M;
- and
- a mapper adapted to map the L interpolated symbols, or symbols derived from the I interpolated symbols, to N orthogonal sub-carriers, wherein a set of N output symbols in a time domain representation is obtained.
Dependencies are inferred from the claim text.