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Tomlinson-Harashima precoding in an OTFS communication system

  • US 10,541,734 B2
  • Filed: 07/24/2018
  • Issued: 01/21/2020
  • Est. Priority Date: 04/01/2016
  • Status: Active Grant
First Claim
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1. A method for wireless communication, comprising:

  • generating, based on a feedback signal, a two-dimensional estimate of a channel, wherein the two-dimensional estimate is in a delay-Doppler domain that comprises a time delay dimension and a frequency shift dimension;

    determining, based on the two-dimensional estimate, a set of precoding values and a set of perturbation values;

    generating a plurality of perturbed symbols by applying the set of perturbation values to a plurality of user symbols;

    generating a plurality of pre-coded symbols by applying the set of precoding values to the plurality of perturbed symbols;

    generating, based on the plurality of pre-coded symbols, a pre-coded signal that is modulated using an orthogonal time frequency space (OTFS) or an orthogonal frequency division multiplexing (OFDM) modulation scheme; and

    transmitting, over the channel, the pre-coded signal.

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