A method for transmitting a reference signal, comprising: transmitting, by a base station, a secondary synchronization signal, SSS, (580, 610) and a primary synchronization signal, PSS, (570, 600) and first cell-specific reference signals, CRSs, (1510, 1550) on a frequency resource corresponding to N resource blocks, RBs, and 7 orthogonal frequency division multiplexing, OFDM, symbols to a user equipment via a first antenna port (1220, 1260), N being a natural number greater than 1; and transmitting, by the base station, second CRSs (1520, 1560) on the frequency resource corresponding to the N RBs and the 7 OFDM symbols to the user equipment, via a second antenna port (1210, 1250), wherein the PSS is transmitted on a frequency resource (1000, 1030, 1040, 1050, 1060) corresponding to K contiguous RBs selected from the N RBs and a sixth OFDM symbol among the 7 OFDM symbols, K being a natural number smaller than N, wherein the SSS is transmitted on the frequency resource corresponding to K contiguous RBs selected from the N RBs and a seventh OFDM symbol among the 7 OFDM symbols, wherein the first CRSs are transmitted on a frequency resource corresponding to M RBs overlapped with the K RBs and the remaining OFDM symbols except for the sixth OFDM symbol and the seventh OFDM symbol, M being a natural number according to the following inequation: K<=M<N, wherein the second CRSs are transmitted on the frequency resource corresponding to the N RBs and the 7 OFDM symbols, wherein a size of the frequency resource corresponding to the N RBs is a system bandwidth, wherein when N is an even number, M is an even number, and wherein when N is an odd number, M is an odd number. transmitting, by a base station, a secondary synchronization signal, SSS, (580, 610) and a primary synchronization signal, PSS, (570, 600) and first cell-specific reference signals, CRSs, (1510, 1550) on a frequency resource corresponding to N resource blocks, RBs, and 7 orthogonal frequency division multiplexing, OFDM, symbols to a user equipment via a first antenna port (1220, 1260), N being a natural number greater than 1; and transmitting, by the base station, second CRSs (1520, 1560) on the frequency resource corresponding to the N RBs and the 7 OFDM symbols to the user equipment, via a second antenna port (1210, 1250), wherein the PSS is transmitted on a frequency resource (1000, 1030, 1040, 1050, 1060) corresponding to K contiguous RBs selected from the N RBs and a sixth OFDM symbol among the 7 OFDM symbols, K being a natural number smaller than N, wherein the SSS is transmitted on the frequency resource corresponding to K contiguous RBs selected from the N RBs and a seventh OFDM symbol among the 7 OFDM symbols, wherein the first CRSs are transmitted on a frequency resource corresponding to M RBs overlapped with the K RBs and the remaining OFDM symbols except for the sixth OFDM symbol and the seventh OFDM symbol, M being a natural number according to the following inequation: K<=M<N, wherein the second CRSs are transmitted on the frequency resource corresponding to the N RBs and the 7 OFDM symbols, wherein a size of the frequency resource corresponding to the N RBs is a system bandwidth, wherein when N is an even number, M is an even number, and wherein when N is an odd number, M is an odd number.