Patent ID: 8755339

Claim:
A method for generating a Dedicated Reference Signal (DRS) sequence in a radio communication system, comprising: allocating at least one Physical Resource Block (PRB) for a User Equipment (UE); generating an initial Reference Signal (RS) sequence using an initialization value based on a Cell Identifier (ID): obtaining the DRS sequence for the UE from the initial RS sequence based on an index of the at least one PRB allocated to the UE; and mapping the DRS sequence for the UE onto a plurality of Resource Elements (REs) based on a DRS port; wherein the plurality of REs comprises three RE sets in one PRB, each RE set includes two consecutive Orthogonal Frequency Division Multiplexing (OFDM) symbols in a time domain and one subcarrier in a frequency domain, one RE set is adapted to be mapped to at least two DRS ports, and the at least two DRS ports are differentiated in the RE set by applying different codes.