Method and apparatus for transmitting or receiving reference signal in beamforming communication system

A method for receiving a reference signal in a beamforming communication system, comprising:

• receiving an orthogonal frequency division multiplex (OFDM) symbol signal including a reference signal sequentially using a plurality of reception beams per pre-designated sub-symbol durations, wherein the OFDM symbol signal is configured such that a same sequence pattern is repeated a predetermined number of times by a period of a predetermined sub-symbol duration on a time domain;
• performing fast fourier transform (FFT) operations on signals of the sub-symbol durations of the OFDM symbol signal;
• generating channel information which corresponds to the plurality of reception beams using signals which are obtained through the FFT operations;
• and
• selecting a preferred reception beam from among the reception beams using the channel information.

An apparatus within a base station transmitting a reference signal in a beamforming communication system, the apparatus comprising:

• a baseband transmitter configured to:
• generate a reference signal sequence for a reference signal to be used for a beam search, to map the reference signal sequence to modulation symbols which correspond to resource elements with same subcarrier spacing which is predetermined on a frequency domain among resource elements to be used for transmitting the reference signal, and
• generate an orthogonal frequency division multiplex (OFDM) symbol signal including the modulation symbols, wherein the OFDM symbol signal is configured such that a same sequence pattern is repeated a predetermined number of times by a period of a predetermined sub-symbol duration on a time domain;
• and
• a radio frequency (RF) transmitting unit configured to transmit the OFDM symbol signal using at least one predetermined transmission beam among transmission beams capable of being used by a base station.