Simultaneous tuning of multiple channels using intermediate...

Details Simultaneous tuning of multiple channels using intermediate... Simultaneous tuning of multiple channels using intermediate...

2005-02-14

2010-02-16

Liu, Shuwang (Department: 2611)

Pulse or digital communications

Receivers

C375S243000, C375S254000, C375S261000, C375S268000, C375S270000, C375S271000, C375S277000, C375S278000, C375S284000, C375S285000

Reexamination Certificate

active

07664203

ABSTRACT:
Methods and systems for processing a single sub-channel that includes two or more combined channels. Using intermediate frequency sub-sampling, two or more channels from a broad band signal are combined into a single sub-channel for further analog and digital processing. Each of the two or more channels is down converted to an intermediate frequency, filtered to remove certain undesired channels, and combined such that the two or more channels are adjacent to each other. A digital representation of the sub-channel is produced from the combined intermediate frequency channels. Each channel within the digital representation is down converted to baseband, and the in-phase and quadrature components are separated from each other. Compared to one direct down conversion technique, intermediate frequency sub-sampling as described in the application may reduce the number of analog to digital converters and control amplifiers used in analog processing by a factor of four.

REFERENCES:
patent: 5428836 (1995-06-01), Sanecki et al.
patent: 5722053 (1998-02-01), Kornfeld et al.
patent: 5852630 (1998-12-01), Langberg et al.
patent: 5956373 (1999-09-01), Goldston
patent: 5959592 (1999-09-01), Petruzzelli
patent: 6072996 (2000-06-01), Smith
patent: 6265949 (2001-07-01), Oh
patent: 6498929 (2002-12-01), Tsurumi
patent: 6507627 (2003-01-01), Imura
patent: 6556639 (2003-04-01), Goldston et al.
patent: 6728467 (2004-04-01), Oshima
patent: 6885695 (2005-04-01), Coniglione
patent: 6922449 (2005-07-01), Bristow
patent: 2002/0012407 (2002-01-01), Sakurai
Notice of Allowance dated Jan. 13, 2005 cited in related U.S. Appl. No. 09/892,124.

Affiliated with

Also associated with

Rating

Simultaneous tuning of multiple channels using intermediate... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Simultaneous tuning of multiple channels using intermediate..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Simultaneous tuning of multiple channels using intermediate... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4221222