Method and system for an alternating delta quantizer for limited feedback MIMO pre-coders
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United States of America Patent
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Aug 26, 2014
Grant Date -
Mar 29, 2012
app pub date -
Dec 5, 2011
filing date -
Feb 12, 2007
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Abstract
Aspects of a method and system for an alternating delta quantizer for limited feedback MIMO pre-coders may comprise quantizing a change in channel state information in a MIMO pre-coding system onto at least a first and a second codebook, each of which comprises one or more unitary matrices, using a cost function; feeding back, in an alternating manner, an index to an element of at least the first codebook or the second codebook, associated with the quantizing, from a receiver to a transmitter in said MIMO pre-coding system, and generating the at least first and second codebook based on at least the channel state information. The channel state information may be a matrix V and the cost function may be defined by the following relationship:
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