OFDM WAVE MEASUREMENT APPARATUS AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide an OFDM measurement apparatus capable of detecting a frequency error larger than a carrier space even for a low level power signal, and accurately measuring an OFDM signal.SOLUTION: A wideband frequency error detection part 27 in an OFDM wave measurement apparatus identifies a carrier position for each carrier by differentially demodulating an IQ signal, which is an FFT output signal, calculating an angle between the differentially demodulated signal and an I axis, and accumulating a pilot signal, modulated in DBPSK and allocated at the same carrier position for each symbol, based on the calculated angle. The wideband frequency error detection part 27 detects a wideband frequency error by calculating a correlation value between the identified pilot signal carrier position and a correct carrier position of the pilot signal. Thus, a frequency error larger than a carrier space can be detected as a wideband frequency error even for a low power signal.