Multiplex communications – Generalized orthogonal or special mathematical techniques – Fourier transform
Reexamination Certificate
2011-05-24
2011-05-24
Chou, Albert (Department: 2471)
Multiplex communications
Generalized orthogonal or special mathematical techniques
Fourier transform
C375S260000
Reexamination Certificate
active
07948868
ABSTRACT:
The present invention relates to a method and arrangement for enhancing efficiency of transmission using Single Channel-Frequency Division Multiple Access (SC-FDMA). The method comprises the step of: applying a Discrete Fourier Transformation (DFT) of time signal providing No samples in a first resulting signal, inserting N1 pilot tones in said resulting signal providing No+N1 tones, Interpolating said signal provided with No+N1 tones to a required size, N, by insertion of zero bins in a middle section of said DFT providing a modified signal, applying Inversed Fast Fourier Transform (IFFT) on said modified signal, and performing a cyclic prefix insertion before transmitting the modified signal. Thus, similar equalizing techniques as for OFDM are possible for efficacy signal reception.
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Ofuji, Y. et al. “Frequency Domain Channel-Dependent Scheduling Employing and Adaptive Transmission Bandwidth for Pilot Channel in Uplink Single-Carrier-FDMA Radio Access.” IEEE 63rd Vehicular Technology Conference, 2006 (VTC 2006-Spring), vol. 1, pp. 334-338.
Chou Albert
Coats & Bennett P.L.L.C.
Telefonaktiebolaget LM Ericsson (publ)
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