PARAMETERISED CODEBOOK SUBSETS FOR USE IN PRECODING MIMO TRANSMISSIONS Russian patent published in 2015 - IPC H04B7/04 H03M3/00 

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to wireless communication systems and is intended for precoding and using parameterised codebook subsets, which can be used to limit codebook choices for different multiple input-multiple output (MIMO) operating modes. The method provides advantages for sending precoder selection feedback from a second transceiver to a first transceiver, used as precoding recommendations. The second transceiver generates two types of precoder selection feedback depending on whether the second transceiver operates in a first or second feedback mode, depending on whether the precoder selection feedback is sent on a data channel or control channel, respectively. Preferably, in the first feedback mode, the second transceiver selects precoders based on DFT from a set of precoders based on DFT providing a first spatial resolution for beam-forming on the first transceiver, and in the second feedback mode, selects from a subset the same precoders based on DFT, wherein said subset provides a lower second spatial resolution for beam-forming on the first transceiver.

EFFECT: high rate of data transmission.

12 cl, 8 dwg