CPFSK-G4B.pptx - CONTINUOUS PHASE FREQUENCY SHIFT KEYING...

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CONTINUOUS PHASE FREQUENCY SHIFT KEYING ACHAS|PALABON|PANGAN|SALEDANIA|TUÑACAO BSECE4B
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CONTINUOUS PHASE FREQUENCY SHIFT KEYING (CP-FSK) o Is binary FSK except the mark and space frequencies are synchronized with the input binary bit rate. o Is often used to transmit digital data reliably over wireline and wireless links at low data rates. o Synchronous simply implies that there is a precise time relationship between the two; it does not mean they are equal. o With CP-FSK, the mark and space frequencies are selected such they are separated from the center frequency by an exact multiple of one-half bit rate, and = )
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WHY CP-FSK? o In FSK abrupt switching from one oscillator output to another in successive signaling intervals results in relatively large spectral size lobes outside of the main spectral band of the signal.
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CP-FSK MODULATION Modulatio n Analo g Digita l Memoryless Memory based CPFSK CPM
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CP-FSK DEMODULATION 1. A frequency discriminator – works well when
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  • Winter '19
  • Phase-shift keying, Frequency-shift keying

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