Transmission method and device for a downlink reference signal

摘要

The present invention relates a method in which a base station transmits a downlink signal by using a plurality of layers comprises the steps of: multiplexing and transmitting dedicated reference signals for the plurality of layers on the basis of a reference signal pattern, wherein 24 resource element positions comprised in the reference signal pattern are set as 6 groups, the 6 groups are set as 2 high-level groups, the reference signal for the plurality of layer is split and placed in the 2 high-level groups, and the reference signal for 2 or more layers placed in the same group is subjected to code-division multiplexing.

主权项

1. A method of transmitting a downlink signal at a base station using a plurality of antenna ports, the method comprising:
multiplexing and transmitting reference signals for the plurality of antenna ports based on a reference signal pattern in a data region of a downlink subframe; and transmitting data for the plurality of antenna ports in the data region of the downlink subframe, wherein the reference signals for the plurality of antenna ports are dedicated reference signals for use when a reception side demodulates the data for the plurality of antenna ports, and wherein the reference signal pattern is defined as a first group of resource elements and a second group of resource elements, wherein, if a number of the plurality of antenna ports is 5, reference signals for a first antenna port, a second antenna port and a fifth antenna port of the plurality of antenna ports are arranged on the first group, and reference signals for a third antenna port and a fourth antenna port of the plurality of antenna ports are arranged on the second group, and wherein, if the number of the plurality of antenna ports is 7, reference signals for the first antenna port, the second antenna port, the fifth antenna port and a seventh antenna port of the plurality of antenna ports are arranged on the first group, and reference signals for the third antenna port, the fourth antenna port and a sixth antenna port of the plurality of antenna ports are arranged on the second group.