Patent ID: 7940643

Claim:
A method of transmitting a sequence in a wireless communication system, the method comprising: initializing, by a transmitter, a first sequence c(i) with an initial value, where i=0, 1, . . . , M max −1, and M max is a length of the first sequence c(i); generating, by the transmitter, a second sequence based on the first sequence c(i); mapping, by the transmitter, a portion or entirety of the second sequence to radio resources; and transmitting, by the transmitter, the mapped second sequence in the radio resources, wherein the first sequence c(i) is defined by a first m-sequence x(i) and a second m-sequence y(i) as shown: c ( i )=( x ( i+Nc )+ y ( i+Nc ))mod 2 x ( i+ 31)=( x ( i+ 3)+ x ( i ))mod 2 y ( i+ 31)=( y ( i+ 3)+ y ( i+ 2)+ y ( i+ 1)+ y ( i ))mod 2 where Nc is a constant, and wherein the initial value is obtained on the basis of (2N ID cell +1), where N ID cell is a cell identifier.