Method and device for feedback transmission in a radio...

Details Method and device for feedback transmission in a radio... Method and device for feedback transmission in a radio...

2006-08-08

2006-08-08

Vuong, Quochien B. (Department: 2684)

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

C455S561000, C342S368000

Reexamination Certificate

active

07089039

ABSTRACT:
A method is provided for beam shaping in a radio communication system having subscriber stations and a base station, and an antenna device with a number of antenna elements that emit a downlink signal weighted with a coefficient of an actual weighting vector to a subscriber station, the actual weighting vector being updated via feedback information from the subscriber station. The subscriber station estimates the direction of a control vector in an M-dimensional vector space using measurements of the downlink signals, it detects a deviation of the estimated direction from the direction of a reference control vector and transmits information representative of the deviation to the base station. The base station then adapts the weighting vector using the representative information.

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Raitola et al., “Transmission Diversity in Wideband CDMA”, pp. 1545-1549.
Schmalenberger et al., “A Comparison of Two Different Algorithms for Multi Antenna C/I Balancing”, pp. 483-490.
Paulraj et al., “Space Time Processing for Wireless Communications”, pp. 49-83.

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