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Precoding a Transmission from a One-Dimensional Antenna Array that Includes Co-Polarized Antenna Elements Aligned in the Array's Only Spatial Dimension

  • US 20180316398A1
  • Filed: 09/04/2015
  • Published: 11/01/2018
  • Est. Priority Date: 09/04/2015
  • Status: Active Grant
First Claim
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1. A method for precoding a transmission from a one-dimensional antenna array that includes co-polarized antenna elements aligned in the array'"'"'s only spatial dimension, the method performed by a transmitting radio node for precoding the transmission to a receiving radio node, characterized by:

  • precoding the transmission from each of different subarrays of the antenna elements using a coarse-granularity precoder that is factorizabie from a multi-granular precoder targeting the array'"'"'s spatial dimension at different granularities, so as to virtualize the subarrays as different auxiliary elements; and

    precoding the transmission from the different auxiliary elements using a finer granularity precoder that is also factorizable from the multi-granular precoder, wherein the multi-granular precoder comprises the Kronecker Product of the coarse-granularity precoder and the finer-granularity precoder, and wherein the coarse granularity precoder and the finer-granularity precoder are included within one or more codebooks used for said precoding.

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