Method and apparatus for synchronizing an OFDM signal

Details Method and apparatus for synchronizing an OFDM signal Method and apparatus for synchronizing an OFDM signal

2005-10-25

2005-10-25

Fan, Chieh M. (Department: 2634)

Pulse or digital communications

Receivers

Angle modulation

C375S316000, C375S324000

Reexamination Certificate

active

06959050

ABSTRACT:
An apparatus (300) for and method of synchronizing OFDM signals utilizes a single baud to provide synchronization in time, frequency, and per-subcarrier rotation (201). Timing and fractional subcarrier frequency synchronization may be obtained from either a known or unknown (e.g., data symbol) baud having known symmetry properties. Because all three synchronization tasks may be accomplished utilizing a single sync baud, the present invention is spectrally efficient. A differential correlation metric is utilized to efficiently provide integer subcarrier frequency synchronization and per-subcarrier rotation synchronization.

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