Signal receiver and method of compensating frequency offset

Details Signal receiver and method of compensating frequency offset Signal receiver and method of compensating frequency offset

2006-12-12

2006-12-12

Kim, Kevin (Department: 2611)

Pulse or digital communications

Synchronizers

Synchronizing the sampling time of digital data

C375S316000, C375S262000, C375S150000, C375S142000, C375S324000, C375S375000, C375S357000

Reexamination Certificate

active

07149266

ABSTRACT:
An OFDM receiver includes an offset compensator (14) compensating for a frequency offset in a received OFDM signal. The offset compensator (14) includes a memory (51) storing two reference signals corresponding to arbitrary portions in the start symbol of the OFDM signal. A cross correlation value between the received OFDM signal and each of the two reference signals is calculated by a cross correlator (52, 53). Each peak position is detected by a peak detector (54). A frequency offset estimate value of the received OFDM signal is estimated by a frequency offset estimation circuit (55) based on the cross correlation value at each detected peak position. A phase rotation circuit (37) compensates for the frequency offset of the received OFDM signal based on the estimated frequency offset estimate value.

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patent: 0 898 403 (1999-02-01), None

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