Patent ID: 9603156
Date: 2017-03-21
CPC Classifications: H04B,H04L,H04W

Claim:
1. A method of transmitting reference signals by a base station in a communication system, the method comprising: determining locations of subcarriers for respective analog beams to transmit the reference signals within a predetermined number of orthogonal frequency division multiplexing (OFDM) symbols, based on indexes of a plurality of analog beams that are formable by an array antenna of the base station; and transmitting the reference signals on the determined locations of the subcarriers by using the analog beams corresponding to the determined locations of subcarriers, wherein locations of the subcarriers corresponding to at least two contiguous analog beams are determined to be adjacent to each other on a time axis or a frequency axis, and wherein a location of a subcarrier on which an analog beam among the plurality of analog beams is used to transmit a reference signal, is determined based on a number of radio frequency (RF) chains, a number of subcarriers to be usable to transmit the reference signals, an index of an OFDM symbol in which the analog beam is used to transmit the reference signal, and an index of the analog beam.