SPECTRUM SPREAD COMMUNICATION METHOD AND SYSTEM USING VERY WEAK POWER, AND HIGH FREQUENCY RADIO APPARATUS

摘要

Provided is a high frequency radio apparatus capable of correcting a frequency of a carrier of the own apparatus in accordance with a frequency of a reception carrier when performing spread spectrum communication using very weak power. A carrier demodulating part (202) demodulates a spread code received from a communication counterpart radio apparatus by using default carrier data, and sends the demodulated spread code to a synchronization timing detecting part (205). When the synchronization timing detecting part (205) detects the spread code from the carrier demodulated data, a carrier frequency deviation detecting part (204) performs a frequency analysis of the spread code to detect a deviation amount of the carrier frequency. A carrier data generating part (206) generates corrected carrier data based on the detected deviation amount. A DBPSK modulating part (211) uses the corrected carrier data to perform data transmission to the communication counterpart radio apparatus.