Suppressing interference for wireless reception and...

Pulse or digital communications – Receivers – Interference or noise reduction

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C375S261000, C375S271000, C375S272000, C375S278000, C375S284000, C375S285000

Reexamination Certificate

active

07623604

ABSTRACT:
A communications receiver may include an adaptive filter unit for removing coherent interference components from a received signal. In the absence of a signal of interest, the filter may adapt dynamically to remove current interference components. When a signal of interest is detected, the filter may be controlled to stop (or at least reduce) its adaptation, to prevent removal of the signal of interest. The received signal may be down-converted to a complex baseband by conditioning circuitry. A detector may detect the signal of interest, and control the filter. Autocorrelation may be used to estimate a characteristic of the signal of interest in the complex baseband. The detector may include hysteresis to react quickly to the start of signal of interest, and more slowly to an end of the signal of interest. The signal of interest may be a frequency shift keyed (FSK) signal. A demodulator may demodulate FSK components based on the autocorrelation result. The characteristic of the signal of interest used for detection and/or demodulation may be a directional characteristic of a vector representing the complex baseband signal in complex space.

REFERENCES:
patent: 4518922 (1985-05-01), Luecke
patent: 4612509 (1986-09-01), Betts et al.
patent: 4647864 (1987-03-01), Rafferty et al.
patent: 5040192 (1991-08-01), Tjahjadi
patent: 5229998 (1993-07-01), Weisser
patent: 5243299 (1993-09-01), Marchetto et al.
patent: 5259030 (1993-11-01), Francis
patent: 5550505 (1996-08-01), Gaus, Jr.
patent: 5729576 (1998-03-01), Burns et al.
patent: 5748036 (1998-05-01), Lee et al.
patent: 5953380 (1999-09-01), Ikeda
patent: 5963597 (1999-10-01), Okawa
patent: 5995567 (1999-11-01), Cioffi et al.
patent: 6272184 (2001-08-01), Ta et al.
patent: 6813482 (2004-11-01), Nakano
patent: 6961423 (2005-11-01), Pessoa et al.
patent: 7181085 (2007-02-01), Despain
patent: 2001/0006511 (2001-07-01), Matt
patent: 2002/0196876 (2002-12-01), Takada
patent: 2003/0007272 (2003-01-01), Jibry
patent: 2003/0235312 (2003-12-01), Pessoa et al.
patent: 2006/0152276 (2006-07-01), Barksdale
patent: 0831595 (1997-09-01), None
patent: 11-215036 (1999-06-01), None

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Suppressing interference for wireless reception and... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Suppressing interference for wireless reception and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Suppressing interference for wireless reception and... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-4125831

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.