| 摘要 |
Embodiments of the present invention relate to a wireless communication system, and more particularly, to a technology for allocating a Channel State Information-Reference Signal (CSI-RS) in a wireless communication system. Embodiments of the present invention provides an apparatus and method for allocating CSI-RSs to resource areas, in which, under the condition of a subframe in which the CP is an extended CP, and the duplex scheme is TDD, if CSI-RSs for maximum 8 antenna ports are allocated, the CSI-RSs are allocated to the 8th and 9th symbols (symbol No. l=7 and 8), wherein each CSI-RS for every two antenna ports is allocated to the same RE while being discriminated from each other by an orthogonal code and neighbor CSI-RS allocated REs in the frequency axis are spaced by an interval of three REs. |
| 主权项 |
1. A method, comprising:
allocating, by a base station (BS), Channel State Information Reference Signals (CSI-RSs) for four pairs of antenna ports to a portion of Resource Elements (REs) in a time-frequency resource area determined by one subframe and 12 subcarriers, wherein two CSI-RSs in one of the four pairs of antenna ports are associated with different orthogonal codes, respectively, wherein the CSI-RSs of a first pair (1st, 2nd) of antenna ports are allocated to a first two consecutive REs, the CSI-RSs of a second pair (3rd, 4th) of antenna ports are allocated to a second two consecutive REs, the CSI-RSs of a third pair (5th, 6th) of antenna ports are allocated to a third two consecutive REs, and the CSI-RSs of a fourth pair (7th, 8th) of antenna ports are allocated to a fourth two consecutive REs, wherein each of the first two consecutive REs, the second two consecutive REs, the third two consecutive REs, and the fourth two consecutive REs corresponds to one subcarrier in a frequency axis and 8th and 9th symbols in a time axis, and wherein the first two consecutive REs has subcarrier index 9, the second two consecutive REs has subcarrier index 6, the third two consecutive REs has subcarrier index 3, and the fourth two consecutive REs has subcarrier index 0. |
