Guard interval and FFT mode detector in DVB-T receiver

Details Guard interval and FFT mode detector in DVB-T receiver Guard interval and FFT mode detector in DVB-T receiver

2004-09-22

2009-08-18

Liu, Shuwang (Department: 2611)

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

C370S206000, C370S208000, C370S209000, C370S210000, C370S343000, C370S252000, C370S436000, C370S503000, C370S350000, C375S260000, C375S326000, C375S344000, C375S340000, C375S350000, C375S354000

Reexamination Certificate

active

07577216

ABSTRACT:
For determining FFT and GI (guard interval) modes within a receiver, a correlation signal is generated from an in-phase and quadrature (I/Q) stream. An plurality of GI mode division signals are generated by processing the correlation signal delayed by different delays. For each of the GI mode division signals, a respective peak-value position and a respective peak-value is determined to be used for determining the GI and FFT modes of the I/Q stream. The correlation calculator generates the correlation signal dependent on the FFT mode to minimize memory capacity and cost of the receiver.

REFERENCES:
patent: 6928048 (2005-08-01), Do et al.
patent: 2002/0186791 (2002-12-01), Foxcroft et al.
patent: 2003/0117943 (2003-06-01), Sakata et al.
patent: 2004/0240379 (2004-12-01), Tsuie
patent: 2005/0265488 (2005-12-01), Jung
European Patent Application No. EP 1267536 to Foxcroft, having Publication date of Dec. 18, 2002.
European Patent Application No. EP 1416693 to Atungsiri et al., having Publication date of May 6, 2004.
Korean Patent Application No. 990003996 to Park, having Application date of Feb. 5, 1996 (w/ English Abstract page).
Japanese Patent No. JP2002204405 to Goji et al., having Publication date of Jul. 19, 2002 (w/ English Abstract page).

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