Low-if pre-preamble antenna diversity receiver

Details Low-if pre-preamble antenna diversity receiver Low-if pre-preamble antenna diversity receiver

2003-11-14

2010-06-01

Gary, Erika A (Department: 2617)

Multiplex communications

Communication over free space

Having a plurality of contiguous regions served by...

C455S277100

Reexamination Certificate

active

07729317

ABSTRACT:
An antenna diversity receiver has a low-IF receiving mode and a diversity selection mode, and a switch arrangement for coupling one of the antennas to the IF channels when in the receiving mode, and coupling each of the channels to a different one of the antennas in the selection mode. A diversity controller compares qualities of signals received simultaneously from the different antennas during the selection mode, and controls the switch arrangement in the receiving mode, to use the better antenna. The quality measurement is carried out during reception of a carrier before a preamble to a desired signal is received, so that there is more time to obtain a better signal quality measurement and to enable better averaging over time. The channels have a polyphase filter with switchable cross coupling between the channels, so that it acts as two independent low pass filters in the selection mode.

REFERENCES:
patent: 4977616 (1990-12-01), Linder et al.
patent: 5802463 (1998-09-01), Zuckerman
patent: 5940452 (1999-08-01), Rich
patent: 6014571 (2000-01-01), Enoki
patent: 6018651 (2000-01-01), Bruckert et al.
patent: 6078796 (2000-06-01), Ling
patent: 6424820 (2002-07-01), Burdick et al.
patent: 6535721 (2003-03-01), Burke et al.
patent: 6563859 (2003-05-01), Oishi et al.
patent: 6721550 (2004-04-01), Okada et al.
patent: 6757267 (2004-06-01), Evans et al.
patent: 6871052 (2005-03-01), Spencer et al.
patent: 7302244 (2007-11-01), Spencer et al.
patent: 7398067 (2008-07-01), Wolf
patent: 2001/0015999 (2001-08-01), Nam
patent: 2002/0122393 (2002-09-01), Caldwell et al.
patent: 2003/0081656 (2003-05-01), Buehrer et al.
patent: 2007/0010206 (2007-01-01), Caldwell et al.
patent: WO0203570 (2002-01-01), None
patent: 02/052749 (2002-07-01), None
patent: WO03049323 (2003-06-01), None
Mogensen, P., et al., “Evaluation of an Advanced Receiver Concept for DECT” Vehicular Technology Conference, 1995 IEEE 45th Chicago, IL, USA Jul. 25-28, 1995, New York, NY, USA, Jul. 25, 1995, pp. 514-519, XP010166996 ISBN: 0-7803-2742-X.

Affiliated with

Also associated with

Rating

Low-if pre-preamble antenna diversity receiver does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Low-if pre-preamble antenna diversity receiver, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low-if pre-preamble antenna diversity receiver will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4200860