Patent ID: 6879575

Claim:
A mobile terminal used in a code division multiple access mobile communication system, in which a base station transmits a control signal via perch channels formed such that a long period code assigned to said base station and a first short period code are mapped in a first section of one slot of said perch channel and a predetermined short period code is mapped in a second section of said one slot, said mobile terminal comprising: an RF unit for converting a received signal of a carrier frequency received from an antenna to a baseband signal; and a matched filter for receiving input of said baseband signal and calculating a correlation value for said baseband signal by using said predetermined short period code to establish slot timing synchronization, wherein a symbol length of said predetermined short period code has a smaller value than a symbol length of said first short period, and wherein in said second section are mapped a second short period code, and a third short period code being one of a plurality of short period codes each corresponding to classification of the long period code spreading said first section.