Patent ID: 8223816

Claim:
A user equipment terminal for transmitting an uplink signal to a base station apparatus, comprising: a retrieving unit configured to retrieve, based on a cell-specific number, a hopping pattern expressed as: H ( y )={ h y,1 ,h y,2 ,h y,3 , . . . ,h y,N } where ‘h y,n ’ is any integer within a range of 0 to (X−1), ‘y’ is a hopping pattern index, ‘N’ is a length of the hopping pattern, and ‘X’ is the number of available Constant Amplitude Zero Auto-Correlation (CAZAC) sequence types, and retrieve a hopping sequence expressed as: F ( x,y )={( h y,1 +x )mod( X ),( h y,2 +x )mod( X ),( h y,3 +x )mod( X ), . . . ,( h y,N +x )mod( X )} where ‘x’ is an offset; a generating unit configured to select the values: ( h y,1 +x )mod( X ),( h y,2 +x )mod( X ),( h y,3 +x )mod( X ), . . . ,( h y,N +x )mod( X ) of the hopping sequence in order, in which an identification number is added in advance to each CAZAC sequence, and generate a reference signal using a CAZAC sequence in order, by identifying the CAZAC sequence using the selected value as the identification number; and a transmitting unit configured to transmit the reference signal generated by the generating unit.