RADIO DISTURBER FOR CDMA CELLULAR PHONE

摘要

PURPOSE: A radio disturber for a CDMA(Code Division Multiple Access) cellular phone is provided to prevent abuse according to imprudent use in a public place by automatically blocking the call of the digital cellular phone in the public place. CONSTITUTION: A PN(Pseudo Noise) generator(100) generates a PN sequence of an I channel and a Q channel used in quadrature spreading. A multi-carrier generator(200) generates a carrier frequency in an entire frequency band of a CDMA cellular phone. A PN quadrature modulator(500) performs a PN quadrature modulation using the PN sequence of the I channel and the Q channel from the PN generator(100), a synchronous channel sequence from a synchronous channel generator(400), and the carrier frequency from the multi-carrier generator(200). An adder adds modulated signals from the PN quadrature modulator(500). An amplifier amplifies the signal added in the adder.