A base station receives channel state information from a wireless device. The base station
transmits to the wireless device one or more data packets on a data channel employing a …

(57) ABSTRACT A method for communication includes receiving at a receiver from a group
of two or more transmitters multiple Radio Frequency (RF) transmission beams that alternate …

This invention is codebook Sub-Sampling of the reporting of Rank Indicator (RI), Channel
Quality Indicator (CQI), first precoding matrix (W1) and second precoding matrix (W2). If CSI …

8,098,750 B2 1/2012 Muecket al. 2010.0056170 A1 3/2010 Lindoffet al. 8,179,775 B2 5,
2012 Chen et al. 2010 OO61477 A1 3/2010 Lee et al. 8,325,844 B2 12/2012 Walton et al …

A method includes holding in a receiver a definition of a codebook including precoding
matrices, and a definition of multiple sub-codebooks including different respective subsets of …

2006.0056538 A1 3, 2006 Nam et al. 2010, 0215112 A1 8, 2010 Tsai et al. 2006/0093060
A1 5/2006 Jung et al. 2010, O220800 A1 9/2010 Erell et al. 2006/01 14858 A1 6/2006 …

5,231,629 A 7/1993 Kotzin et al. 5,263,160 A 1 1/1993 Porter, Jr. et al. 5,349,567 A 9, 1994
Reed 5,940,439 A 8, 1999 Kleider et al. 6,466,904 B1 10/2002 Gao et al. 6,512,750 B1 …

A method includes receiving in a mobile communication terminal over a communication
channel a Multiple-Input Multiple-Output (MIMO) signal that includes at least a transmission …

7,839.944 8,036,286 8,068,555 8,098,750 8,179,775 2003.0035491 2005, 0141630 2005.
O157810 2005/0237920 2005/0250544 2006, OO14554 2006.0056538 2006/0093060 …

A method includes receiving in a mobile communication terminal from a base station a
precoded Multiple-Input Multiple-Output (MIMO) signal, which includes a first signal …