OFDM demodulation method and semiconductor integrated...

Details OFDM demodulation method and semiconductor integrated... OFDM demodulation method and semiconductor integrated...

2007-12-25

2007-12-25

Trost, William (Department: 2617)

Multiplex communications

Communication over free space

Combining or distributing information via frequency channels

C370S207000, C370S208000, C370S252000, C370S342000, C375S340000, C375S346000, C375S316000, C455S067110, C455S067130

Reexamination Certificate

active

10809898

ABSTRACT:
The invention comprises: processing for receiving an OFDM packet having a preamble and the following data transmission symbol, in which packet the subcarrier interval of the preamble is set wider than that of the data transmission symbol; processing for estimating a DC offset occurring at a receiving side by using the received preamble; processing for correcting the DC offset on the received data transmission symbol, according to the estimation result of the DC offset; and processing for demodulating the DC offset corrected data transmission symbol. Thus, it is possible to estimate a DC offset and then correct the DC offset according to the estimated value, in the OFDM packet with no nul symbol defined there.

REFERENCES:
patent: 2001/0033601 (2001-10-01), Nafie et al.
patent: 2003/0174790 (2003-09-01), Ho et al.
patent: 2003/0227875 (2003-12-01), Wei et al.
patent: 2004/0198265 (2004-10-01), Wallace et al.
patent: 2004/0233838 (2004-11-01), Sudo et al.
patent: 2004/0240376 (2004-12-01), Wang et al.
patent: 2006/0176968 (2006-08-01), Keaney et al.
patent: 06-326739 (1994-11-01), None

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