Timing offset compensation in orthogonal frequency division...

Details Timing offset compensation in orthogonal frequency division... Timing offset compensation in orthogonal frequency division...

2007-07-31

2007-07-31

Fan, Chieh M. (Department: 2611)

Pulse or digital communications

Systems using alternating or pulsating current

Plural channels for transmission of a single pulse train

C375S341000, C375S267000

Reexamination Certificate

active

10689424

ABSTRACT:
A robust timing offset compensation scheme for multi-carrier systems. According to the invention, a timing offset compensator is provided to compensate a current symbol in the frequency domain for the effect of timing offset with a timing offset prediction value. Then a timing error estimator calculates a timing error value for the current symbol based on a function of a phase tracking value, a channel response of each pilot subcarrier, transmitted data on each pilot subcarrier, and a timing compensated version of the current symbol on the pilot subcarrier locations. Furthermore, a timing tracking unit receives the timing error value of the current symbol to generate a shift amount of the DFT window and the timing offset prediction value for a next symbol.

REFERENCES:
patent: 2002/0145971 (2002-10-01), Cho et al.
patent: 2005/0058193 (2005-03-01), Saed

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