Telecommunications – Transmitter and receiver at separate stations – With control signal
Reexamination Certificate
2005-09-21
2009-12-22
Le, Nhan T (Department: 2618)
Telecommunications
Transmitter and receiver at separate stations
With control signal
C455S067110, C455S513000, C455S562100
Reexamination Certificate
active
07636553
ABSTRACT:
Aspects of a double search user group selection scheme with range reduction for FDD multiuser MIMO downlink transmission with finite-rate channel state information feedback are provided. The method may comprise maximizing system capacity using feedback information for a plurality of signals in a frequency division duplex system to reduce a search range within which a group of signals having maximum channel gain are located. The feedback information may comprise quantized gain for the signals. Quantized channel direction for the signals within the reduced search range may be requested and received by the transmitter. One or two signals from the reduced search range that maximizes system capacity may be selected. The receivers associated with these signals may then be selected as the user group.
REFERENCES:
patent: 6728307 (2004-04-01), Derryberry et al.
patent: 7139328 (2006-11-01), Thomas et al.
patent: 2004/0233871 (2004-11-01), Seki et al.
patent: 2005/0190868 (2005-09-01), Khandekar et al.
patent: 2005/0265223 (2005-12-01), Song
patent: 2006/0203794 (2006-09-01), Sampath et al.
patent: 2007/0066237 (2007-03-01), Zhang et al.
E. Telatar, “Capacity of multi-antenna gaussian channels,” Bell Labs Technical Journal, pp. 1-28, Jun. 1995.
G. J. Foschini, “Layered space-time architecture for wireless communication in a fading environment when using multi-element antennas,” Bell Labs Technical Journal, vol. 1, No. 2, pp. 41-59, Autumn 1996.
S. Caire, G. Shamai, “On the achievable throughput of a multiantenna gaussian broadcast channel,” IEEE Trans. on Information Theory, vol. 49, No. 7, pp. 1691-1706, Jul. 2003.
C. B. Peel, B. M. Hochwald, and A. L. Swindlehurst, “A vector-perturbation technique for near-capacity multiantenna nultiuser communication—Part I: channel inversion and regularization,” IEEE Trans. on Communications, vol. 53, No. 1, pp. 195-202, Jan. 2005.
C. Windpassinger, R. F. H. Fischer, T. Vencel, and J. B. Huber, “Precoding in multiantenna and multiuser communications,” IEEE Trans. on Wireless Communications, vol. 3, No. 4, pp. 1305-1316, Jul. 2004.
B. M. Hochwald, C. B. Peel, and A. L. Swindlehurst, “A vector-perturbation technique for near-capacity multiantenna multiuser communication—Part II: perturbation,” IEEE Trans. on Communications, vol. 53, No. 3, pp. 537-544, Mar. 2005.
T. Yoo and A. J. Goldsmith, “Optimality of zero-forcing beamforming with multiuser diversity,” in 2005 IEEE International Conference on Communications, Seoul, Korea, May 2005, pp. 542-546.
D. Gesbert and M. S. Alouini, “How much feedback is multi-user diversity really worth?” in IEEE International Conference on Communications 2004, vol. 1, 2004, pp. 234-238.
S. Sanayei and A. Nosratinia, “Exploiting multiuser diversity with only 1-bit feedback,” in IEEE Wireless Communications and Networking Conference 2005, vol. 2, Seattle, 2005, pp. 978-983.
J. C. Roh and B. D. Rao, “Transmit beamforming in multiple antenna systems with finite rate feedback: A VQ-based approach,” submitted to IEEE Trans. on Information Theory, 2004.
Rooyen Pieter van
Zhang Chengjin
Zheng Jun
Broadcom Corporation
Le Nhan T
McAndrews Held & Malloy Ltd.
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