Memory reduction in digital broadcast receivers

Details Memory reduction in digital broadcast receivers Memory reduction in digital broadcast receivers

2006-04-22

2010-02-16

Tran, Khanh C (Department: 2611)

Pulse or digital communications

Systems using alternating or pulsating current

Plural channels for transmission of a single pulse train

C370S210000, C708S404000

Reexamination Certificate

active

07664187

ABSTRACT:
An input random access memory (RAM) module of a fast Fourier transform (FFT) engine of a DVB receiver is used to store, during a first time period, delayed versions of an input signal that includes a first orthogonal frequency division multiplexed (OFDM) symbol and a cyclic prefix therefor received at the receiver, and samples for a second OFDM symbol to be demodulated using the FFT engine during a second time period. Delayed versions of the input signal are stored in the input RAM module of the FFT engine in a first-in-first-out (FIFO) fashion for signal acquisition and for FFT processing. Similarly, an output RAM module of the FFT engine is used to store moving averages of an autocorrelation of the input signal with its cyclic prefix computed over presumed guard intervals and over multiple symbols.

REFERENCES:
patent: 6061406 (2000-05-01), Carson et al.
patent: 6411892 (2002-06-01), Van Diggelen
patent: 6417801 (2002-07-01), Van Diggelen
patent: 6429814 (2002-08-01), Van Diggelen et al.
patent: 6453237 (2002-09-01), Fuchs et al.
patent: 6484097 (2002-11-01), Fuchs et al.
patent: 6487499 (2002-11-01), Fuchs et al.
patent: 6510387 (2003-01-01), Fuchs et al.
patent: 6542820 (2003-04-01), LaMance et al.
patent: 6560534 (2003-05-01), Abraham et al.
patent: 6606346 (2003-08-01), Abraham et al.
patent: 6704651 (2004-03-01), Van Diggelen
patent: 7164723 (2007-01-01), Sunwoo
patent: 2002/0137464 (2002-09-01), Dolgonos et al.
patent: 2003/0228892 (2003-12-01), Maalismaa et al.
patent: 2004/0100939 (2004-05-01), Kriedte et al.
patent: 2005/0251844 (2005-11-01), Martone et al.
patent: 2006/0093023 (2006-05-01), Brown et al.
patent: 2006/0248135 (2006-11-01), Cousineau et al.
Kevin Cousineau, “Fast Fourier Transform”, Mar. 11, 2005, Provisional Application.
Kuo, Jen-Chih “VLSI Desing of a Variable-Length FFT/IFFT Processor for OFDM-Based Communication Systems”. In the EURASIP Journal on Applied Signal Processing, vol. 2003, Issue 13, p. 1306-1316.
PCT International Search Report, Mar. 21, 2008.

Affiliated with

Also associated with

Rating

Memory reduction in digital broadcast receivers does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Memory reduction in digital broadcast receivers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Memory reduction in digital broadcast receivers will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4223245