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Multi-valued FSK communication method and multi-valued FSK communication apparatus

  • US 20030091121A1
  • Filed: 11/13/2002
  • Published: 05/15/2003
  • Est. Priority Date: 11/14/2001
  • Status: Abandoned Application
First Claim
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1. A multi-valued FSK communication method, in which a transmitter side forms a transmission signal by multi-valued FSK modulating a packet including a synchronization signal part and a payload part and transmits the transmission signal to a receiver side, the receiver side receives the transmission signal and A/D-converts an analog demodulation signal generated by demodulating a reception signal so as to compare with a reference value, so that a multi-valued digital signal is generated, the method comprising:

  • in the transmitter side, forming the transmission signal by performing multi-valued FSK modulation using only the minimum value and the maximum value in multi-valued FSK with respect to the synchronization signal part of the packet and by performing normal multi-valued FSK modulation with respect to the payload part; and

    transmitting the transmission signal to the receiver side, and in the receiver side, outputting the analog demodulation signal and a binary signal generated by binarizing the analog demodulation signal from a reception circuit unit for demodulating the reception signal to a baseband processing unit; and

    in the baseband processing unit, correcting the reference value for determining the level of multi-valued FSK based on a digital demodulation signal generated by A/D-converting the analog demodulation signal after synchronization is established based on the binary signal, and A/D-converting the payload part of the analog demodulation signal so as to compare with the reference value, thereby generating the multi-valued digital signal.

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