| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an OFDM demodulator that reduces a required capacity of a memory so as to be able to decrease the circuit scale. SOLUTION: Storage means 2, 3 respectively store I, Q data obtained by applying orthogonal demodulation to a received signal by an orthogonal demodulation section 1. A 1st supply means 4 reads prescribed data stored in the storage means 2, 3 and gives the data to an FFT circuit 6. A 2nd supply means 5 reads prescribed data stored in the storage means 2, 3 and gives the data to a synchronous demodulation circuit 7. The synchronous demodulation circuit 7 specifies start timing of FFT by synchronous demodulation. The FFT circuit 6 applies an FFT arithmetic operation to the data supplied from the 1st supply means 4 on the basis of the timing specified by the synchronous demodulation circuit 7 and outputs the obtained result as output data.</p> |
