Method and Apparatus for Multiplexing Demodulation Reference Signals and Communication System

An apparatus for multiplexing demodulation reference signals, comprising:

• a memory that stores a plurality of instructions;
• a processor coupled to the memory and configured to execute the instructions to:
• transmit data and demodulation reference signals supporting a plurality of User Equipment (UE) or data streams by using one or more time-frequency resource blocks;
• wherein, the demodulation reference signals of each UE or each data stream occupy subcarriers 0, 1, 6, 7;
• or subcarriers 2, 3, 8, 9;
• or subcarriers 4, 5, 10, 11 of each resource block, and wherein
• the demodulation reference signals of the plurality of UEs or data streams are superimposed on identical time-domain resources in a manner of frequency-division multiplexing, and the demodulation reference signals of the plurality of the UEs or data streams are superimposed on identical time-frequency resources in a manner of code-division multiplexing.

A communication system, comprising:

• one or more User Equipment (UE) configured to transmit data and demodulation reference signals supporting a plurality of UE or data streams by using one or more time-frequency resource blocks;
• and
• a base station configured to receive the demodulation reference signals transmitted by the one or more UEs, and perform channel estimation and data demodulation and decoding according to the demodulation reference signals;
• wherein, the data and demodulation reference signals of each UE or each data stream occupy subcarriers 0, 1, 6, 7;
• or subcarriers 2, 3, 8, 9;
• or subcarriers 4, 5, 10, 11 of each resource block,
• the demodulation reference signals of the plurality of UEs or data streams are superimposed on identical time-domain resources in a manner of frequency-division multiplexing, and the demodulation reference signals of the plurality of the UEs or data streams are superimposed on identical time-frequency resources in a manner of code-division multiplexing.