Wide range frequency offset estimation in OFDM systems

Details Wide range frequency offset estimation in OFDM systems Wide range frequency offset estimation in OFDM systems

2005-03-01

2005-03-01

Nguyen, Hanh (Department: 2662)

Multiplex communications

Communication techniques for information carried in plural...

Combining or distributing information via time channels

C370S208000, C370S480000, C375S240280, C375S356000

Reexamination Certificate

active

06862297

ABSTRACT:
Systems and methods for wide offset frequency synchronization in OFDM communications. Frequency domain OFDM bursts include training symbols having known transmitted values in known frequency domain positions. Received values at the known training symbol positions are correlated from burst to burst. The magnitudes are used to establish and correct small integer frequency offsets as measured in frequency domain symbol widths. The phase of the correlation result is used to determine and correct integer frequency offsets that exceed the training tone spacing. Use of the phase to correct large frequency offsets greatly extends the acquisition range required for low cost analog components.

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