Pulse or digital communications – Systems using alternating or pulsating current – Plural channels for transmission of a single pulse train
Reexamination Certificate
2006-08-31
2010-10-26
Liu, Shuwang (Department: 2611)
Pulse or digital communications
Systems using alternating or pulsating current
Plural channels for transmission of a single pulse train
C375S347000, C375S230000, C455S132000, C342S417000
Reexamination Certificate
active
07822141
ABSTRACT:
Embodiments of the present invention include systems and methods for optimizing the transmitter and receiver weights of a MIMO system. In one embodiment, the weights are optimized to create and steer beam nulls, such that each transmitted signal is substantially decoupled from all other signals between a MIMO transmitter a MIMO receiver. In another embodiment, the weights are selected such that, the signal strength of each weighted signal transmitted through a communications channel along a respective signal path is substantially equivalent, but for which the weighting vectors are not necessarily orthogonal. In a further embodiment, each transmitted signal is coupled only between its own transmitter and receiver antennas with a gain, or eigenvalue, that is a consequence of the weights, and which is bounded to within a desired range of values while at the same time the weighing vectors are orthogonal. Embodiments employing various decomposition techniques are also provided.
REFERENCES:
patent: 6091361 (2000-07-01), Davis et al.
patent: 6307882 (2001-10-01), Marzetta
patent: 6446025 (2002-09-01), Nakamura et al.
patent: 6483478 (2002-11-01), Yu et al.
patent: 6728307 (2004-04-01), Derryberry et al.
patent: 6757339 (2004-06-01), Ratnarajah et al.
patent: 6785520 (2004-08-01), Sugar et al.
patent: 6859503 (2005-02-01), Pautler
patent: 6870882 (2005-03-01), Al-Dhahir et al.
patent: 6888809 (2005-05-01), Foschini et al.
patent: 6897807 (2005-05-01), Kishigami et al.
patent: 6965762 (2005-11-01), Sugar et al.
patent: 7016657 (2006-03-01), Boariu
patent: 7039369 (2006-05-01), Horng
patent: 7069050 (2006-06-01), Yoshida
patent: 7095709 (2006-08-01), Walton
patent: 7113558 (2006-09-01), Lozano et al.
patent: 7136437 (2006-11-01), Benesty et al.
patent: 7203249 (2007-04-01), Raleigh et al.
patent: 7206606 (2007-04-01), Kobayashi et al.
patent: 7245679 (2007-07-01), Aoki
patent: 7263132 (2007-08-01), Horng et al.
patent: 7266157 (2007-09-01), Sim et al.
patent: 7289552 (2007-10-01), Kwak
patent: 7308026 (2007-12-01), Purho
patent: 2002/0118781 (2002-08-01), Thomas et al.
patent: 2002/0126045 (2002-09-01), Kishigami et al.
patent: 2002/0154705 (2002-10-01), Walton et al.
patent: 2003/0063654 (2003-04-01), Onggosanusi et al.
patent: 2003/0185310 (2003-10-01), Ketchum et al.
patent: 2003/0203743 (2003-10-01), Sugar et al.
patent: 2004/0023621 (2004-02-01), Sugar et al.
patent: 2004/0032910 (2004-02-01), Horng et al.
patent: 2004/0076248 (2004-04-01), Purho
patent: 2004/0082356 (2004-04-01), Walton et al.
patent: 2004/0136316 (2004-07-01), Kwak et al.
patent: 2004/0136349 (2004-07-01), Walton et al.
patent: 2004/0165676 (2004-08-01), Krishnan et al.
patent: 2004/0189523 (2004-09-01), Kishigami et al.
patent: 2004/0190636 (2004-09-01), Oprea
patent: 2004/0209579 (2004-10-01), Vaidyanathan
patent: 2004/0247054 (2004-12-01), Ferreol et al.
patent: 2005/0078762 (2005-04-01), Ketchum et al.
patent: 2005/0101259 (2005-05-01), Tong et al.
patent: 2005/0101352 (2005-05-01), Logothetis et al.
patent: 2005/0129137 (2005-06-01), Yamada et al.
patent: 2005/0152484 (2005-07-01), Sandhu et al.
patent: 2005/0238111 (2005-10-01), Wallace et al.
patent: 2005/0287962 (2005-12-01), Mehta et al.
patent: 2006/0148429 (2006-07-01), Inogai et al.
patent: 2007/0253476 (2007-11-01), Tirkkonen et al.
patent: 2007/0253508 (2007-11-01), Zhou et al.
patent: 2007/0258536 (2007-11-01), Kim et al.
patent: 2008/0043873 (2008-02-01), Ariyavisitakul
patent: 2008/0170533 (2008-07-01), Cyzs et al.
USPTO; File History U.S. Appl. No. 10/954,429 to Wight, filed Sep. 30, 2004; through Jun. 13, 2006.
USPTO; File History U.S. Appl. No. 10/954,429 to Wight, filed Sep. 30, 2004; Apr. 13, 2007 through Mar. 12, 2008.
USPTO; File History U.S. Appl. No. 10/954,429 to Wight, filed Sep. 30, 2004; Jul. 3, 2008 through Jan. 28, 2009.
USPTO; File History U.S. Appl. No. 10/884,633 to Wight, filed Jul. 2, 2004; Application filed.
USPTO; File History U.S. Appl. No. 10/884,633 to Wight, filed Jul. 2, 2004; Aug. 27, 2004 through Jan. 19, 2006.
USPTO; File History U.S. Appl. No. 10/884,633 to Wight, filed Jul. 2, 2004; Jan. 24, 2006 through Nov. 27, 2008.
USPTO; File History U.S. Appl. No. 10/884,633 to Wight, filed Jul. 2, 2004; Feb. 29, 2008 through Mar. 13, 2008.
USPTO; File History U.S. Appl. No. 10/884,633 to Wight, filed Jul. 2, 2004; Jun. 9, 2008 through Oct. 7, 2.
USPTO; File History U.S. Appl. No. 10/884,633 to Wight, filed Jul. 2, 2004; Nov. 4, 2008.
USPTO; File History U.S. Appl. No. 10/884,633 to Wight, filed Jul. 2, 2004; Jan. 12, 2009.
USPTO; File History U.S. Appl. No. 10/884,633 to Wight, filed Jul. 2, 2004; Jun. 2009.
Liu Shuwang
Neff Michael R
Stolowitz Ford Cowger LLP
LandOfFree
Multiple input, multiple output communications systems does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Multiple input, multiple output communications systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multiple input, multiple output communications systems will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4228051