Method of transmitting reference signal and transmitter using the same

摘要

A method and apparatus of transmitting a reference signal in a wireless communication system is provided. A reference signal sequence is generated by using a pseudo-random sequence. A portion or entirety of the reference signal sequence is mapped to at least one resource block and is transmitted. The pseudo-random sequence is generated by a gold sequence generator which is initialized with initial values obtained by using cell identifier. The reference signal provides low PAPR and high cross correlation characteristic.

主权项

1. A method comprising:
receiving, by a user equipment, a reference signal sequence from a cell based on a cell identifier of the cell; and estimating, by the user equipment, a channel state based on the reference signal sequence, wherein the reference signal sequence is defined byrl,ns⁡(m)=12⁢⁢(1-2·c⁡(2⁢m))+j⁢⁢12⁢(1-2·c⁡(2⁢m+1)),⁢m=0,1,…⁢,2⁢NRBma⁢⁢x,DL-1 where ns is a slot number within a radio frame, l is an orthogonal frequency division multiplexing (OFDM) symbol number within a slot, NRBDL is a maximum number of resource blocks (RBs), and c(2m) and c(2m+1) are defined by a pseudo-random sequence c(i), where i=0, 1, . . . , Mmax−1, and Mmax is a length of the pseudo-random sequence c(i), and wherein the pseudo-random sequence c(i) is generated by a gold sequence generator which is initialized with an initial value obtained on the basis of (2 NIDcell+1), where NIDcell is the cell identifier.