Phase offset spatial multiplexing

Details Phase offset spatial multiplexing Phase offset spatial multiplexing

2008-04-08

2008-04-08

Vo, Don N (Department: 2611)

Pulse or digital communications

Systems using alternating or pulsating current

Plural channels for transmission of a single pulse train

C375S261000, C375S281000

Reexamination Certificate

active

10655012

ABSTRACT:
A rotation by a phase offset is applied to symbols to be transmitted by one antenna relative to symbols to be transmitted from another antenna in a wireless communication system employing multi-element antennas at the transmitter. Such a phase offset allows the functionality of a MIMO system to be maintained when a MIMO channel degenerates. Advantageously, a MIMO system using the new signal design may provide a level of performance in a rich-scattering environment that is equivalent to a MIMO system using a known signal design. Furthermore, a MIMO system employing embodiments of the present invention may show significantly improvements in robustness over conventional MIMO systems.

REFERENCES:
patent: 5345599 (1994-09-01), Paulraj et al.
patent: 5438594 (1995-08-01), Podolak
patent: 6097771 (2000-08-01), Foschini
patent: 6317466 (2001-11-01), Foschini et al.
patent: 6785341 (2004-08-01), Walton et al.
Boutros et al.; “On Random Rotations Diversity and Minimum MSE Decoding of Lattices”; IEEE Trancations on Information Theory; vol. 46, No. 4; Jul. 2000. pp. 1584-1589.
Paulraj et al.; Space-Frequency Coded Broadband OFDM Systems; IEEE 2000; pp. 1-6.
Sharma, N. et al., Improved Quasi-Orthogonal Codes Through Constellation Rotation, IEEE Transactions on Communications, vol. 51, No. 3, Mar. 2003 pp. 332-335.
Larsson, Improving the Frame-Error-Rate of Spactial Multiplexing in Block Fading by Randomly Rotating the Signal Constellation, IEEE Communications Letter, vol. 8, No. 8, Aug. 2004, pp. 514-516.
Young et al., Coordinate- Interleaved Space-Time coding with Rotated Constellation, Vehicular Technology Conference, 2003 VTC 2003-Spring, Th 57th IEEE Semiannual vol. 1 Apr. 22-25, 2003 pp. 732-735.
Lucent Technologies; News Release: Chips developed by Bell Labs will enable mobile devices to receive more than 19 megabits of data per second on 3G networks; Oct. 16, 2002.
Lucent Technologies; News Release: BLAST Named “Patent to Watch” by Devon Prutzman; May 20, 2002.
Rohit U. Nabar et al.: Cut-off Rate Based Transmit Optimization for Spatial Multiplexing on General MIMO Channels; 2003.
P.W. Wolniansky et al.: V-BLAST: An Architecture for Realizing Very High Data Rates Over the Rich-Scattering Wireless Channel; Bell Laboratories,Lucent Technologies, NJ; 1998.
Rohit U. Nabar et al.: Transmit Optimization for Spatial Multiplexing in the Presence of Spatial Fading Correlation; 2001.
ETSI standard 300-744.

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