Antenna selection with RF imbalance

Details Antenna selection with RF imbalance Antenna selection with RF imbalance

2011-03-29

2011-03-29

Maung, Nay (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Plural receivers

C455S140000, C375S347000

Reexamination Certificate

active

07917107

ABSTRACT:
A method for selecting antennas in a multiple-input, multiple-output wireless communications network that includes multiple stations is presented. Each station includes a set of transmit RF chains and a set of receive RF chains, and each RF chain is connectable to a set of antennas. A first station transmits a training frame for each possible subset of the set of antennas, and the set of transmit RF chains are connected to the subset of antennas according to a connection mapping rule while transmitting each training frame. A subchannel matrix is estimated in a second station for each frame. The subchannel matrices are combined to obtain a complete channel matrix. A particular subset of the antennas is selected according to the complete channel matrix. The set of transmit RF chains is connected to the selected particular subset of antennas to transmit data from the first station to the second station.

REFERENCES:
patent: 6804312 (2004-10-01), Win et al.
patent: WO 03/034614 (2003-04-01), None
patent: WO 2005/034387 (2005-04-01), None
patent: WO 2005/034387 (2005-04-01), None
Molisch et al. “MIMO Systems with Antenna Selection,” Mar. 2004.

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