Intermittent calibration apparatus

An intermittent calibration apparatus comprising:

• receiving means for receiving a signal resulting from multiplexing a communication signal spread using a signal-specific spreading code and sent, and a calibration signal spread using a signal-specific spreading code and sent for each unit frame for a predetermined time in a same frequency band;
• extracting means for extracting said communication signal and said calibration signal from the received signal through despreading processing using said spreading code;
• calibration means capable of executing calibration processing using the extracted calibration signal in parallel with a communication using the extracted communication signal;
• and
• demodulating means for carrying out demodulation processing on the extracted communication signal using the result of said calibration processing.

A calibration method comprising:

• a transmitting step of transmitting a calibration signal spread using a signal-specific spreading code for each unit frame for a predetermined time;
• a receiving step of receiving a signal resulting from multiplexing the calibration signal sent with a communication signal spread using a signal-specific spreading code in a same frequency band;
• an extracting step of extracting said communication signal and said calibration signal from the received signal through despreading processing using said spreading code;
• a calibration step capable of executing calibration processing using the extracted calibration signal in parallel with a communication using the extracted communication signal;
• and
• a demodulating step of carrying out demodulation processing on the extracted communication signal using the result of said calibration processing.