Invention Grant
- Patent Title: Apparatus and method for recovering frequency in an orthogonal frequency division multiplexing system
- Patent Title (中): 在正交频分复用系统中恢复频率的装置和方法
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Application No.: US11606353Application Date: 2006-11-30
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Publication No.: US07733971B2Publication Date: 2010-06-08
- Inventor: Hee-Jin Roh , Su-Jin Yoon , Min-Goo Kim
- Applicant: Hee-Jin Roh , Su-Jin Yoon , Min-Goo Kim
- Applicant Address: KR Suwon-si
- Assignee: Samsung Electronics Co., Ltd.
- Current Assignee: Samsung Electronics Co., Ltd.
- Current Assignee Address: KR Suwon-si
- Agency: Roylance, Abrams, Berdo & Goodman, LLP
- Priority: KR10-2005-0116041 20051130
- Main IPC: H04K1/10
- IPC: H04K1/10

Abstract:
An apparatus and method for recovering a carrier frequency of a received signal using a predefined symbol in an OFDM system is provided. A maximum value detector detects at least three values and their corresponding offsets in descending order among auto-correlation values calculated within a specific frequency offset range between a received signal and a predefined symbol. A frequency offset corrector compares a ratio of a first auto-correlation value to a second auto-correlation value with a predetermined first threshold, determines whether first and second frequency offsets corresponding to the first and second auto-correlation values are adjacent to each other if the ratio of the auto-correlation values is less than the first threshold, and determines an initial carrier frequency offset using a difference between the first frequency offset and a frequency offset correction value determined according to system, if the first and second frequency offsets are adjacent to each other and a ratio of the second auto-correlation value and a third auto-correlation value is greater than a predetermined second threshold.
Public/Granted literature
- US20070133699A1 Apparatus and method for recovering frequency in an orthogonal frequency division multiplexing system Public/Granted day:2007-06-14
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