| 摘要 |
To provide a multi-valued FSK communication method and a multi-valued FSK communication apparatus having a simplified circuit configuration for receiving a multi-valued FSK packet. A transmitter side transmits a packet including a synchronization signal part using the maximum value and the minimum value of multi-valued FSK and a payload part using all values of multi-valued FSK. A receiver side receives the packet, and a reception circuit 3 forms an analog demodulation signal Sda by demodulating a reception signal and a binary signal Sb by binarizing the analog demodulation signal Sdm. These signals Sda and Sb are supplied to a received data processing unit 23 of a baseband signal processor 12. The received data processing unit 23 establishes synchronization based on the binary signal Sb. Also, after synchronization is established, a reference value used for converting a digital demodulation signal to a multi-valued digital signal is corrected based on the digital demodulation signal Sdd, which corresponds to a synchronization signal part, generated by A/D-converting the analog demodulation signal Sda.
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