| 摘要 |
PROBLEM TO BE SOLVED: To provide an OFDM reception circuit that can realize both high speed signal transmission and high efficiency of utilizing. SOLUTION: The OFDM(orthogonal frequency division multiplexing) reception circuit is provided with a branching device 11 that branches a received signal into a plurality of N sequences, N oscillators 14, 15 that output carrier signals with an interval of an integer multiple of a sub-carrier frequency interval of the received signal whose frequency synchronization is established, N orthogonal detectors 12, 13 that receive N sequences of OFDM signals and output signals from the N oscillators 14, 15, N pairs of filters 16 to 19 that eliminate a spurious wave components from a complex OFDM signal outputted from the orthogonal detectors 12, 13, N pairs of analog/digital converters 20 to 23 that convert the complex OFDM signal outputted from the filters into a digital signal, N Fourier transform devices 24, 25 that receive the digital complex OFDM signal and output a modulation signal of each sub-carrier, and a sub-carrier demodulator 26 that demodulates the modulation signal of each sub-carrier.
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