Pulse or digital communications – Synchronizers – Feedback – receiver to transmitter
Reexamination Certificate
2007-05-29
2007-05-29
Tran, Khanh (Department: 2611)
Pulse or digital communications
Synchronizers
Feedback, receiver to transmitter
Reexamination Certificate
active
10197965
ABSTRACT:
Provided are techniques for the adjustment of antenna transmission weighting values in a communications system that utilizes multiple transmit antennas. A first signal is transmitted on a first multiplex channel via the multiple transmit antennas using a set of transmission weighting values. A second signal is transmitted on a second multiplex channel (different than the first channel) via the multiple transmit antennas using a set of perturbation weighting values. Then, a response that indicates at least one of: whether the set of perturbation weighting values should be added to the set of transmission weighting values and whether the set of perturbation weighting values should be subtracted from the set of transmission weighting values is received from a receiver of the first and second signals. Finally, a new set of transmission weighting values is generated based on the received response.
REFERENCES:
patent: 6141393 (2000-10-01), Thomas et al.
patent: 6373881 (2002-04-01), Mizuguchi et al.
patent: 6434366 (2002-08-01), Harrison et al.
patent: 6728307 (2004-04-01), Derryberry et al.
patent: 6950457 (2005-09-01), Choi
Derryberry, et al. (Nokia), “Transmit Adaptive Arrays without User Specific Pilot”, Aug. 1999.
Banister, et al., “A Stochastic Gradient Algorithm for Transmit Antenna Weight Adaptation with Feedback”, Workshop on Signal Processing Advances in Wireless Communications, Mar. 2001.
Banister, et al., “Tracking Peformance of a Stochastic Gradient Algorithm for Transmit Antenna Weight Adaptation with Feedback”, International Conference on Acoustics, Speech and Signal Processing, May 2001.
Harrison (Motorola), “TX AA Parameter Recommendations”, Sep. 1999.
Harrison, et al. (Motorola), “Open and Closed Loop Transmit Diversity at High Data Rates on 2 and 4 Elements”, Aug. 1999.
Liang, et al., “Forward Link Antenna Diversity Using Feedback for Indoor Communication Systems”, Proceedings of International Conference on Acoustics, Speech and Signal Processing, May 1995, pp. 1753-1755.
Liang, et al., “Transmit Antenna Array Techniques for Cellular CDMA Systems”, Proceedings of the Ninth International Symposium on Personal, Indoor, and Mobile Radio Communications, Sep. 1998, pp. 1396-1400.
Rashid-Farrokhi, et al., “Transmit Beamforming and Power Control for Cellular Wireless Systems”, IEEE Journal on Selected Areas in Communications, vol. 16, No. 8, Oct. 1998.
Ahn Sam K.
Kirkpatrick & Lockhart Preston Gates & Ellis LLP
Tran Khanh
VIA Telecom Co. Ltd.
LandOfFree
Multiple transmit antenna weighting techniques 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 transmit antenna weighting techniques, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multiple transmit antenna weighting techniques will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3818668