Channel reciprocity matrix determination in a wireless MIMO...

Details Channel reciprocity matrix determination in a wireless MIMO... Channel reciprocity matrix determination in a wireless MIMO...

2007-07-10

2007-07-10

D'Agosta, Steve M. (Department: 2617)

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

C455S553100, C455S101000, C455S103000, C455S132000, C370S319000, C370S320000, C370S321000

Reexamination Certificate

active

11209003

ABSTRACT:
Operating a wireless MIMO system to determine forward and reverse channel reciprocity matrices relating a first wireless MIMO device and a second wireless MIMO device of the wireless MIMO system includes, during each of a plurality of time intervals, determining a forward composite channel estimates and a reverse composite channel estimates between the first wireless MIMO device and the second wireless MIMO device to yield a plurality of forward composite channel estimates and a plurality of reverse composite channel estimates. Operation continues with creating a mathematical relationship between the plurality of forward composite channel estimates and the plurality of reverse composite channel estimates and the forward and reverse channel reciprocity matrices. Operation concludes with finding a solution to the mathematical relationship between the plurality of forward composite channel estimates and the plurality of reverse composite channel estimates to yield the forward reciprocity matrix and the reverse channel reciprocity matrix.

REFERENCES:
patent: 7110349 (2006-09-01), Branlund et al.
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patent: 2006/0056522 (2006-03-01), Tsatsanis et al.
patent: 2006/0072683 (2006-04-01), Kent et al.
patent: 2006/0159160 (2006-07-01), Kim et al.

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