Apparatus for deriving in-phase and quadrature-phase baseband si

Details Apparatus for deriving in-phase and quadrature-phase baseband si Apparatus for deriving in-phase and quadrature-phase baseband si

1996-05-06

1998-07-28

Tse, Young T.

Pulse or digital communications

Receivers

Angle modulation

375316, 375350, H04L 2722

Patent

active

057871256

ABSTRACT:
In-phase (I) and quadrature-phase (Q) baseband signals (312, 314) are derived from a digitized signal (318) having a sampling rate. The digitized signal is band pass filtered (604) to produce a band passed signal (320), and the band passed signal is delayed (606) to produce a delayed band passed signal (322). The band passed signal and the delayed band passed signal are decimated (608) by a predetermined amount to produce, respectively, a decimated signal (328) and a decimated delayed signal (330). The decimated signal and the decimated delayed signal are low pass filtered (610) to produce, respectively, the I and Q baseband signals.

REFERENCES:
patent: 5023940 (1991-06-01), Johnson
patent: 5187719 (1993-02-01), Birenheier et al.
patent: 5202766 (1993-04-01), Mehrgardt et al.
patent: 5444415 (1995-08-01), Dent et al.
patent: 5479453 (1995-12-01), Anvari et al.
patent: 5490173 (1996-02-01), Whikehard et al.
patent: 5504455 (1996-04-01), Inkol
patent: 5548244 (1996-08-01), Clewer
patent: 5548617 (1996-08-01), Patel et al.
patent: 5619536 (1997-04-01), Gourgue
Richard Schreier and W. Martin Snelgrove, "Decimation for Bandpass Sigma-Delta Analog-to-Digital Conversion", pp. 1801-1804, Aug. 1990, University of Toronto, Toronto, Canada.
E. Dijkstra, O. Nys, C. Piquet, and M. Degrauwe, "On the Use of Modulo Arithmetic Comb Filters in Sigma Delta Modulators", pp. 457-460, Apr. 1988, Switzerland.

Affiliated with

Also associated with

Rating

Apparatus for deriving in-phase and quadrature-phase baseband si does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus for deriving in-phase and quadrature-phase baseband si, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for deriving in-phase and quadrature-phase baseband si will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-29115