Method and device for generating precoding matrix in wireless communication system

摘要

Provided is a method and a device for generating a precoding matrix in a wireless communication system. The method for generating the precoding matrix comprises a step of receiving from a terminal feedback including information on the error angle θ of channel direction information (CDI), which indicates the direction of a channel direction vector, and a step of generating the precoding matrix based on the information on the error angle θ of the CDI, wherein the error angle θ of the CDI indicates the angle between the channel direction vector and a quantized channel direction vector, and includes at least one of a channel quantization error component, a channel feedback delay error component, and a channel estimation error component.

主权项

1. A method of generating a precoding matrix in a wireless communication system, the method comprising:
receiving a feedback including information on an error angle θ of channel direction information (CDI) which indicates a direction of channel direction vector from a terminal, and generating a precoding matrix based on the information on the error angle θ of the CDI, wherein the error angle θ of the CDI indicates an angle between the channel direction vector and a quantized channel direction vector, wherein the error angle θ of the CDI includes at least one of a channel quantization error component, a channel feedback delay error component and a channel estimation error component, and wherein the channel direction vector and the quantized channel direction vector have a relationship of Equation below:
{tilde over (h)}k=cos θk·vk+sin θk·ek, where {tilde over (h)}k is the channel direction vector on kth user, vk is the quantized channel direction vector on kth user, ek is an error vector on kth user, and θk is the error angle on kth user.