Apparatus and method for allocating channel state information-reference signal in wireless communication system

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. An apparatus, comprising:
a processor configured to allocate Channel State Information-Reference Signals (CSI-RSs) for maximum 8 antenna ports to resource areas including a plurality of Resource Elements (REs) under a condition of a subframe in which an extended Cyclic Prefix (CP) is employed as a CP and a Time Division Duplex (TDD) scheme is employed as a duplex scheme, wherein CSI-RSs for a pair of antenna ports are allocated to REs corresponding to one sub-carrier at every 12 sub-carriers in a frequency band and corresponding to 8th and 9th symbols in a subframe, one subframe having a total of 12 symbols for the extended CP, CSI-RSs for the pair of antenna ports are allocated to identical REs, the CSI-RS for a first antenna port in the pair of antenna ports and the CSI-RS for a second antenna port in the pair of antenna ports being discriminated from each other by different orthogonal codes, and CSI-RSs for a first pair of two neighboring pairs of antenna ports are allocated in first REs and CSI-RSs for a second pair of the two neighboring pairs are allocated in second REs, the first REs and the second REs being spaced apart by having two REs between the first REs and the second REs along a frequency axis.