Patent · US Active

Method and base station for orthogonal frequency division multiplexing (OFDM) signal processing

US8126070B2 · kind B2 · utility

4Cited by

2References

22Claims

0Family size

Assignee

Telefonaktiebolaget LM Ericsson (Publ) · SE

Inventors

Thord Hyllander · Solna, SE
Leonard Rexberg · Lindenstraße, SE
Jacob Österling · Järfälla, SE
Vimar Björk · Gothenburg, SE
Tore Andre · Alvesta, SE
Torbjorn Gunnar Widhe · Mölndal, SE
Daniel Larsson · Stockholm, SE

Key dates

Filing date	Dec 1, 2008
Grant date	Feb 28, 2012
Priority date	—
Expiry date	Sep 26, 2030

Classification

Technology area (CPC H)Electricity
CPC primaryH04L27/2626
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

A method and base station for forming an OFDM signal from a baseband signal includes a partitioning unit configured to partition a block of baseband signal samples into sub-blocks. A sub-carrier mapper maps the sub-blocks onto adjacent sub-carrier blocks of an OFDM multi-carrier to form corresponding unprefixed OFDM symbols. A cyclic prefix adder adds a cyclic prefix to each mapped sub-block to form prefixed OFDM symbols. Phase compensations force the unprefixed OFDM symbol part of all subsequently up-converted prefixed OFDM symbols to start at the same phase. Up-converters up-convert the phase compensated prefixed OFDM symbols to respective radio frequency bands having center frequencies and bandwidths that preserve the OFDM multi-carrier structure. A combiner combines the up-converted phase compensated prefixed OFDM symbols into an OFDM signal.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.