US 9,319,117 B2 · Codeword feedback method and receiver

Abstract

Embodiments of the present invention disclose a codeword feedback method and a receiver, which relate to the field of communication technologies. The method includes: determining a precoding type used for downlink signal transmission, or receiving codebook indication signaling transmitted by a transmitter; selecting a codebook according to the precoding type, or selecting a codebook according to the codebook indication signaling; and selecting a codeword according to the codebook, and feeding back the codeword to the transmitter. The present invention can provide a new feedback mechanism for channel state information and a non-linear precoding codebook when needing to use both linear precoding and non-linear precoding, so that a communication system can select an appropriate precoding codebook to feed back state information according to different needs, thereby improving the performance of the communication system.

Claims9

Dependent claims

A codeword feedback method, comprising:

determining, by a receiver, a precoding type used for downlink signal transmission, wherein the precoding type is linear precoding or non-linear precoding, or receiving, by a receiver, codebook indication signaling which is transmitted by a transmitter and indicates whether a linear precoding codebook or a non-linear precoding codebook should be selected by the receiver;
selecting, by the receiver, a codebook from the linear precoding codebook and the non-linear precoding codebook according to the precoding type, or selecting the codebook from the linear precoding codebook and the non-linear precoding codebook according to the codebook indication signaling, wherein the non-linear precoding codebook is generated through performing a phase transformation to a right singular vector of a channel coefficient matrix to generate training data and processing the training data according to a nearest neighbor criterion;
and
selecting, by the receiver, a codeword according to the codebook, and feeding back the codeword to the transmitter.

1 more element

A receiver, comprising:

a processing module, configured to determine a precoding type used for downlink signal transmission, wherein the precoding type is linear precoding or non-linear precoding, or receive codebook indication signaling which is transmitted by a transmitter and indicates whether a linear precoding codebook or a non-linear precoding codebook should be selected by the receiver;
a codebook selecting module, configured to select a codebook from the linear precoding codebook and the non-linear precoding codebook according to the precoding type, or select a codebook from the linear precoding codebook and the non-linear precoding codebook according to the codebook indication signaling, wherein the non-linear precoding codebook is obtained through performing a phase transformation to a right singular vector of a channel coefficient matrix to generate training data and processing the training data according to a nearest neighbor criterion;
and
a feedback module, configured to select a codeword according to the codebook, and feed back the codeword to the transmitter.

1 more element

Dependencies are inferred from the claim text.

Codeword feedback method and receiver

Life of this patent

Codeword feedback method and receiver

Life of this patent

Abstract

Claims9