直交周波数分割多重システムにおけるキャリア周波数同期装置及び方法

Title:

直交周波数分割多重システムにおけるキャリア周波数同期装置及び方法

Document Type and Number:

Japanese Patent JP4638944

Kind Code:

B2

Abstract:

An apparatus and method for carrier frequency synchronization in an Orthogonal Frequency Division Multiplexing (OFDM) system are provided for correcting an initial carrier frequency offset in the OFDM system. A metric generator for frequency estimation performs a first accumulation process for a value computed by multiplying a Phase Reference Symbol (PRS) generated from a reception stage by a Fast Fourier Transform (FFT) output signal for an OFDM symbol in a PRS position within a frame, acquires a differential symbol from a product of adjacent FFT output symbols, performs a second accumulation process for a real part extracted from the differential symbol, and outputs a metric value for the frequency estimation. A maximal value-related index generator compares metric values for initial frequency estimation within a predetermined frequency offset estimation range, and selects and outputs a maximal metric value as a frequency offset estimate.

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Inventors:

Roh Jin
Youngsu-Jin
Kim Min-gu

Application Number:

JP2008543198A

Publication Date:

February 23, 2011

Filing Date:

November 29, 2006

Export Citation:

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