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US 2010/0074356 A1Published application
Methods for precoding signals for transmission in wireless MIMO system
AssigneeAlcatel Lucent
InventorAlexei Ashikhmin
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Abstract
Methods discussed herein provide more efficient precoding matrices for precoding signals prior to transmission. The methods discussed herein improve throughput in wireless MIMO systems. Methods discussed herein are applicable to frequency division duplexing (FDD) systems, time division duplexing (TDD) systems as well as other wireless communication systems.
Claims20
A method for precoding signals for transmission, the method comprising:
- generating, at a base station, channel matrices as a function of an estimated channel matrix and channel estimation error matrices;
- determining, at the base station, a set of first and a set of second diagonal matrices associated with the estimated channel matrix and the channel estimation error matrices;
- iteratively computing, at the base station, the precoding matrix based on at least the generated channel matrices, the first set of diagonal matrices and the second set of diagonal matrices;
- and
- precoding the signals for transmission based on the precoding matrix.
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A method of signal transmission from base station to mobile, the method comprising:
- iteratively computing, at the base station, a precoding matrix based on intermediate precoding matrix parameters, the intermediate precoding matrix parameters being computed based on channel parameters associated with a wireless channel between the base station and the mobile, the channel parameters including at least generated diagonal matrices and a set of channel matrices associated with the wireless channel;
- precoding signals for transmission to the mobile based on the precoding matrix;
- and
- transmitting the precoded signals to the mobile.
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Dependencies are inferred from the claim text.