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TECHNIQUES FOR CHANNEL ESTIMATION USING USER EQUIPMENT SPECIFIC REFERENCE SIGNALS BASED ON SMOOTHED PRECODERS IN A FREQUENCY DOMAIN

  • US 20170164367A1
  • Filed: 08/01/2016
  • Published: 06/08/2017
  • Est. Priority Date: 12/07/2015
  • Status: Active Grant
First Claim
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1. A method of wireless communication comprising:

  • identifying a plurality of intermediate precoders corresponding to a first plurality of tone subsets, the plurality of intermediate precoders defining a plurality of vectors across the first plurality of tone subsets, wherein each of the plurality of vectors comprises at least frequency domain components and non-frequency domain components;

    selecting, for each vector of the plurality of vectors, a subset of the non-frequency domain components of the vector;

    modifying the plurality of intermediate precoders to a plurality of smoothed precoders corresponding to a second plurality of tone subsets based at least in part on the selected subset of non-frequency domain components for each vector, wherein the plurality of smoothed precoders is smoothed in a frequency domain compared to the plurality of intermediate precoders; and

    precoding a plurality of transmit streams using the plurality of smoothed precoders, wherein one or more of the plurality of transmit streams comprise a bandwidth allocation having one or more user equipment (UE)-specific reference signal tone locations uniformly spaced within the bandwidth allocation, the bandwidth allocation comprising a plurality of resource blocks (RBs) that are contiguous in frequency over the bandwidth allocation.

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