METHODS AND APPARATUS FOR GENERATING AND USING REFERENCE SIGNALS IN COMMUNICATION SYSTEM Russian patent published in 2013 - IPC H04L5/00 

FIELD: radio engineering, communication.

SUBSTANCE: method of transmitting reference signals in a communication system involves transmitting, from a base station, a first reference signal specific to a first group of user devices, wherein the first reference signal has a first reference signal pattern based at least in part on the transmission mode of each user device from the first group, and transmitting, from the base station, a common reference signal to a second group of user devices, wherein the common reference signal has a second reference signal pattern different from the first reference signal pattern and second group of user devices includes the first group of user devices.

EFFECT: high efficiency and capacity.

91 cl, 19 dwg