A noise generator for generating multi-octave, high-level, millimeter- and submillimeter-wave noise is disclosed. This allows decrease in false recognition of the speed. A PRACH preamble is transmitted through one uplink component carrier linked to the downlink component carriers using the received PRACH TF slot and preamble sequence information. Once the driver virtual machine completes handling of the forwarded interrupt, it copies data made available by the corresponding device to the shared memory for access by the polling identified virtual machine. The electrically conductive metal strip can be housed in a receptacle of the upper and lower parts. Additionally, occurrence of two-bit error may be prevented because the copyback program is not executed when the fail signal is generated.