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  4. Beamforming codebook adaption to antenna array imperfections
 
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Title

Beamforming codebook adaption to antenna array imperfections

Date Issued
2018
Author(s)
Großmann, Marcus
Landmann, Markus
Varatharaajan, Sutharshun
Patent No
3358756
Abstract
A transmitter includes an antenna array (202, 304) having a plurality of antennas for a wireless communication with one or more receivers, and a precoder (204) connected to the antenna array (202, 304). The precoder (204) applies a set of beamforming weights to the antenna array (202, 304). The set of beamforming weights is selected from a codebook (212) to form by the antenna array (202, 304) one or more transmit/receive beams or nulls pointing in selected directions. The codebook (212) includes a plurality of sets of beamforming weights for a plurality of directions. The beamforming weights in the codebook (212) are based on a first antenna array response matrix ( Ã ( Õ, & )) , the first antenna array response matrix ( Ã ( Õ, & )) defined by a second antenna array response matrix ( A ( Õ, & )) and one or more transformation matrices ( K,K q ). The first antenna array response matrix ( Ã ( Õ, & )) contains, for a plurality of directions, first array response vectors ( ã ( Õ m , & n )) of the antenna array (202, 304), the second antenna array response matrix ( A ( Õ , & )) contains, for one or more of the plurality of directions, second array response vectors of the antenna array (202, 304), the second array response vectors determined using a model of the antenna array (202, 304), and the one or more transformation matrices ( K, K q ) describing one or more characteristics of the antenna array (202, 304).
Language
en
Institute
Fraunhofer-Institut für Integrierte Schaltungen IIS
Link
https://worldwide.espacenet.com/publicationDetails/biblio?DB=worldwide.espacenet.com&FT=D&CC=EP&NR=3358756A1
Patenprio
EP 3358756 A1: 20170202
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