主权项 |
1. A method of transmitting a demodulation reference signal (DMRS) in a wireless communication system, time-frequency resource elements (REs) being used in the wireless communication system for transmission of information, the method comprising:
generating at least one first receiver specific DMRS, the at least one first receiver specific DMRS being associated with a data channel; generating at least one second receiver specific DMRS, the at least one second receiver specific DMRS being associated with a control channel, the control channel being associated with the data channel, the at least one second receiver specific DMRS being different from the at least one first receiver specific DMRS; transmitting the at least one first receiver specific DMRS with the data channel, wherein time-frequency REs of a first physical resource block (PRB) are utilized for transmission of the data channel and the at least one first receiver specific DMRS, and time-frequency REs of the first PRB being utilized for transmission of the at least one first receiver specific DMRS located in a first set of RE positions in the first PRB; and transmitting the at least one second receiver specific DMRS with the control channel, wherein time-frequency REs of a second PRB are utilized for transmission of the control channel and the at least one second receiver specific DMRS, time-frequency REs of the second PRB being utilized for transmission of the at least one second receiver specific DMRS located in a second set of RE positions in the second PRB, and the second set of RE positions in the second PRB overlap with the first set of RE positions in the first PRB; wherein a first sequence of symbols :{ap(k)}, k=0, 1, . . ., L−1 is used for modulating time-frequency REs at the first set of RE positions in the first PRB for generation of the at least one first receiver specific DMRS, the first PRB being used for transmission of the data channel at a transmitting antenna port p, L is a positive integer. |