Transmission method of demodulation reference signal, base station and user equipment

A method for transmitting a demodulation reference signal, comprising:

• a user equipment receiving a plurality of demodulation reference signal (DMRS) ports through frequency division multiplexing (FDM) and/or code division multiplexing (CDM) and/or time division multiplexing (TDM);
• wherein
• when the user equipment uses eight layers to receive data, DMRS port 7, port 8, port 11 and port 13 receive data in corresponding subcarriers of corresponding OFDM symbols, and a total of four resource elements:
• two consecutive subcarriers of a same OFDM symbol and same two consecutive subcarriers of another OFDM symbol in a same OFDM group use the CDM method to multiplex four DMRS ports, wherein orthogonal masks are [1, 1, 1, 1], [1, 1, −1, −1], [1, −1, −1, 1] and [1, −1, 1, −1].

A base station, wherein the base station comprises:

• a first module, configured to:
• perform frequency division multiplexing (FDM) and/or code division multiplexing (CDM) and/or time division multiplexing (TDM) on a plurality of demodulation reference signal (DMRS) ports;
• a second module, configured to:
• transmit a multiplexed DMRS;
• wherein
• when the base station uses eight layers to transmit data, DMRS port 7, port 8, port 11 and port 13 transmit data in corresponding subcarriers of corresponding OFDM symbols, and a total of four resource elements:
• two consecutive subcarriers of a same OFDM symbol and same two consecutive subcarriers of another OFDM symbol in a same OFDM group use the CDM method to multiplex four DMRS ports, wherein orthogonal masks are [1, 1, 1, 1], [1, 1, −1, −1], [1, −1, −1, 1] and [1, −1, 1, −1].

A user equipment, wherein the user equipment comprises:

• a first module, configured to:
• store multiplexing information of demodulation reference signal (DMRS) ports, wherein the multiplexing information refers to:
• a DMRS going through frequency division multiplexing (FDM) and/or code division multiplexing (CDM) and/or time division multiplexing (TDM);
• a second module, configured to:
• receive a plurality of demodulation reference signal (DMRS) ports;
• wherein
• when the user equipment uses eight layers to receive data, DMRS port 7, port 8, port 11 and port 13 receive data in corresponding subcarriers of corresponding OFDM symbols, and a total of four resource elements:
• two consecutive subcarriers of a same OFDM symbol and same two consecutive subcarriers of another OFDM symbol in a same OFDM group use the CDM method to multiplex four DMRS ports, wherein orthogonal masks are [1, 1, 1, 1], [1, 1, −1, −1], [1, −1, −1, 1] and [1, −1, 1, −1].