Method and device for generating and mapping channel state information reference signal sequence

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 a wireless communications system;
• 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.

An User Equipment (UE), comprising a generating unit, a mapping acquiring unit, a receiving unit and a measuring 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 Channel State Information Reference Signal (CSI-RS) sequence according to maximum bandwidth of a wireless communications system;
• the mapping acquiring unit is configured to:
• cut the first CSI-RS sequence according to an actual bandwidth of the system, and obtain a second CSI-RS sequence configured to be mapped to a time frequency location of a CSI-RS antenna port;
• the receiving unit is configured to receive a CSI-RS sequence sent by an evolved Node B (eNB) in the time frequency location of the CSI-RS antenna port;
• the measuring unit is configured to calculate the CSI-RS sequence received by the receiving unit and the second CSI-RS sequence obtained by the mapping acquiring unit, and perform a channel estimation and a channel measurement.

An evolved Node B (eNB), comprising a device for generating and mapping a Channel State Information Reference Signal (CSI-RS) sequence, and the device 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 a wireless communications system;
• 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.