Patent ID: 8774226
Filing Date: 2014-07-08
Classification: H04L,H04W

Abstract:
1. A device for generating and mapping a Channel State Information Reference Signal (CSI-RS) sequence, comprising a generating unit and a mapping unit, wherein: the generating unit is configured to: generate a pseudo-random sequence according to a pseudo-random sequence initial value, perform a Quadrature Phase-Shift Keying (QPSK) modulation on the pseudo-random sequence, and obtain a first CSI-RS sequence according to maximum bandwidth of system; generate the pseudo-random sequence and obtain the first CSI-RS sequence based on an Orthogonal Frequency Division Multiplexing (OFDM) symbol or a subframe; generate the pseudo-random sequence and obtain the first CSI-RS sequence based on the OFDM symbol; obtain the pseudo-random sequence initial value c obtain the pseudo-random sequence initial value c the mapping unit is configured to: cut the first CSI-RS sequence according to an actual bandwidth of the system, obtain a second CSI-RS sequence, and map the second CSI-RS sequence to a time frequency location of a CSI-RS antenna port; cut the first CSI-RS sequence to obtain the second CSI-RS sequence and map the second CSI-RS sequence to the time frequency location of the CSI-RS antenna port in a following way: when the second CSI-RS sequence is mapped based on the OFDM symbol, second CSI-RS sequences mapped on two OFDM symbols which are located in a same CDM group are produced from different first CSI-RS sequences; when the second CSI-RS sequence is mapped based on the subframe, second CSI-RS sequences mapped on two OFDM symbols which are located in the same CDM group are produced from different parts of same first CSI-RS sequence.