Title:
OFDMシステムでの初期周波数の同期方法及び装置
Document Type and Number:
Japanese Patent JP4125715
Kind Code:
B2
Abstract:
An apparatus and method for performing coarse frequency synchronization in an orthogonal frequency division multiplexing (OFDM) receiver includes cyclically shifting a received signal X(k) by a predetermined shift amount d , determining the length of a summation interval according to a phase coherence bandwidth and a number K of sub-bands into which the summation interval is divided, generating and adjusting a symbol time offset according to the number K of sub-bands, generating a weighted phase reference signal Z(k) which is phase-shifted by the symbol time offset and weighted by a weighting vector determined according to a frequency band, partially correlating the shifted signal X(k+d) and the weighted phase reference symbol Z(k) and calculating a partial correlation value for each of the K sub-bands; and determining the shift amount d max at a maximum sum of the partial correlation values and outputs the shift amount d max as an estimated coarse frequency offset.
Inventors:
Satoshi Kinmitsu
Application Number:
JP2004368295A
Publication Date:
July 30, 2008
Filing Date:
December 20, 2004
Export Citation:
Assignee:
SAMSUNG ELECTRONICS CO.,LTD.
International Classes:
H04J11/00; H04L7/00; H04L7/10; H04L27/26
Domestic Patent References:
| JP2000236322A | ||||
| JP2001156742A | ||||
| JP2003134078A | ||||
| JP2003152679A | ||||
| JP2003087352A | ||||
| JP2001268046A | ||||
| JP2000196560A | ||||
| JP11112460A | ||||
| JP2004282759A | ||||
| JP11163822A | ||||
| JP2000286820A |
Attorney, Agent or Firm:
Masatake Shiga
Takashi Watanabe
Yasuhiko Murayama
Shinya Mitsuhiro
Takashi Watanabe
Yasuhiko Murayama
Shinya Mitsuhiro