Mirror sub-carrier demodulation circuit, receiving device with the same, and mirror sub-carrier demodulating method

摘要

A mirror sub-carrier demodulation circuit includes a waveform generation unit, which generates a composite waveform of received I and Q signals, and a peak detection unit, which detects peak values of the composite waveform generated by the waveform generation unit. The demodulation circuit also includes a peak interval detection unit, which detects an interval of the peak values detected by the peak detection unit and generates timing at which the received data is input. The demodulation further includes a temporary storage unit, which stores I data and Q data at the timing generated by the peak interval detection unit, a calculation unit, which performs a correlation calculation using the I data and the Q data of the temporary storage unit acquired during a 1-bit period on the basis of a setting value M of a mirror sub-carrier, and a data determination unit, which determines data of 0 or 1 from the result calculated by the calculation unit.