US Patent Application 18022790. DOWNLINK SYMBOL-LEVEL PRECODING AS PART OF MULTIUSER MISO COMMUNICATION simplified abstract

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DOWNLINK SYMBOL-LEVEL PRECODING AS PART OF MULTIUSER MISO COMMUNICATION

Organization Name

Telefonaktiebolaget LM Ericsson (publ)


Inventor(s)

Maha Alodeh of Stockholm (SE)

DOWNLINK SYMBOL-LEVEL PRECODING AS PART OF MULTIUSER MISO COMMUNICATION - A simplified explanation of the abstract

This abstract first appeared for US patent application 18022790 titled 'DOWNLINK SYMBOL-LEVEL PRECODING AS PART OF MULTIUSER MISO COMMUNICATION

Simplified Explanation

The patent application describes a method for downlink symbol-level precoding in multiuser MISO communication.

  • The method involves obtaining a data vector for a current time instant, which contains data symbols for multiple users.
  • The data vector is then precoded by determining an output vector for the current time instant.
  • The output vector is determined by searching for a data vector from a previous time instant that is co-linear with the current data vector.
  • If a co-linear data vector is found, the output vector is calculated by multiplying the output vector of the previous time instant with a co-linearity factor.


Original Abstract Submitted

There is provided mechanisms for downlink symbol-level precoding as part of multiuser MISO communication. A method is performed by a network node. The method comprises obtaining a data vector of a current time instant to be precoded. The data vector comprises data symbols for 1 users. The current time instant corresponds to a single symbol. The method comprises precoding the obtained data vector by determining an output vector for the data vector of the current time instant. Determining the output vector for the current time instant comprises searching for a data vector of a previous time instant that is co-linear with the data vector of the current time instant according to a co-linearity factor. When such a data vector of the previous time instant is found, the output vector is equal to an output vector of the previous time instant multiplied with the co-linearity factor.

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