Title:
OFDMレシーバにおける残留周波数誤差推定
Document Type and Number:
Japanese Patent JP4647616
Kind Code:
B2
Abstract:
An OFDM receiver configured for measuring frequency error based on comparing prescribed pilot tones from a prescribed group of consecutive symbols in a received OFDM signal. A complex conjugate generator is configured for generating complex conjugates of the prescribed pilot tones of a first subgroup of the consecutive symbols. A multiplier is configured for generating a complex pilot product, for each symbol subgroup position, by multiplying the pilot tones of a second subgroup symbol at the corresponding symbol subgroup position with the respective complex conjugates of the first subgroup symbol at the corresponding symbol subgroup position. A complex summation circuit sums the complex pilot products of the symbol subgroup positions to obtain an accumulated complex value. A error calculator calculates the frequency error from the accumulated complex value for use in correcting frequency offset.
Inventors:
Sujo
Chimin (Norman) Chen
Ji (Rex) Shwe
Orlando Cannerons
Chimin (Norman) Chen
Ji (Rex) Shwe
Orlando Cannerons
Application Number:
JP2006542573A
Publication Date:
March 09, 2011
Filing Date:
October 26, 2004
Export Citation:
Assignee:
ADVANCED MICRO DEVICES INCORPORATED
International Classes:
H04J11/00; H04L27/26
Domestic Patent References:
| JP2002026858A | ||||
| JP2002217824A | ||||
| JP2002158631A | ||||
| JP2002214320A |
Attorney, Agent or Firm:
Yuji Hayakawa
Masataka Ota
Keisuke Murasame
Ryota Sano
Masataka Ota
Keisuke Murasame
Ryota Sano