Adaptive transmit diversity with quadrant phase constraining...

Telecommunications – Transmitter – Diversity

Reexamination Certificate

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C455S562100, C375S299000

Reexamination Certificate

active

07103326

ABSTRACT:
A method increases transmit diversity gain in a wireless communication system. In the wireless network, a transmitter has multiple antennas and a receiver has one antenna. A phase of each of received signal is measured. One signal is selected as a reference signal. For each other signal, a phase, with respect to the phase of the reference signal, is measured independently to determine feedback information indicating a required rotation of each other signal so that a phase of each other rotated signal is within an identical quadrant as the phase of the reference signal. The feedback information for each other signal is sent to the transmitter. In the transmitter, each other signal is phase rotated according to the corresponding feedback information before the signal is transmitting to the receiver.

REFERENCES:
patent: 6754286 (2004-06-01), Hottinen et al.
patent: 6892059 (2005-05-01), Kim et al.
patent: 2002/0186785 (2002-12-01), Hoshino et al.
patent: 2003/0148738 (2003-08-01), Das et al.
S.M. Alamouti, “A simple transmit diversity technique for wireless communications,”IEEE J. Select. Area Commun., vol. 16, pp. 1451-1458, Oct. 1998.
V. Tarokh, H. Jafarkhani, and A.R. Calderbank, “Space-time block codes from orthogonal designs,”IEEE Trans. Info. Theory, vol. 45, pp. 1456-1467, Jul. 1999.
Y. Xin, Z. Wang, and G.B. Giannakis, “Space-time diversity systems based on linear constellation precoding,”IEEE Trans. Wireless Commun., vol. 2, pp. 294-309, Mar. 2003.
S. Zhou, G.B. Giannakis, “Optimal transmitter eigen-beamforming and space-time block coding based on channel mean feedback,”IEEE Trans. Signal Processing, vol. 50, pp. 2599-2613, Oct. 2002.
J.H. Horng, L. Li, and J. Zhang, “Adaptive space-time transmit diversity for MIMO systems,” inProc. IEEE Veh. Techno. Conf. VTC'03 Spring, pp. 1070-1073, Apr. 2003.
M.K. Simon, and M.-S. Alouini, “A unified approach to the performance analysis of digital communication over generalized fading channels,”Proc. of IEEE, vol. 86, pp. 1860-1877, Sep. 1998.

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