Communication blocking device and communication blocking method

In the cutting device 20 the communication by the generator 38 and the PN code of the delay corrector 40 so that the receiving antenna 21, a wide-band amplifier 22 and 26, a multiplier 24, the BPF 28, carrier detector 32, a frequency divider 34, the synchronization catcher 36 and the phase of the PN code of the PN code sequence generator 38 is advanced out by the code generator inverter 41 inverts it to the inverted code sequence. By a multiplier 42, a power amplifier 44 and transmitting antenna 47 transmits the inverted code sequence. In this manner, the inverted code sequence as the communication disconnection wave transmitted, a code sequence constituting the inverter guide GDMA manner inverted pilot signal, and having a leading phase, it is possible to advance the phase of the inverted code sequence to substantially no phase lag accurately guiding manner during the transmission of the pilot signal cancellation, it is possible to make the portable telephone base station is located outside its recognition of the calling area circle.