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BFSK generation and demodulation, Slides of Electrical and Electronics Engineering

West Bengal University of Teachers' Training Electrical and Electronics Engineering

BFSK generation and demodulation

Typology: Slides

2024/2025

Uploaded on 05/27/2026

soumitra-bhowmik 🇮🇳

26 documents

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5.2

5-1 DIGITAL-TO-ANALOG CONVERSION

Digital-to-analog conversion is the process of

changing one of the characteristics of an analog

signal based on the information in digital data.

Aspects of Digital-to-Analog Conversion

Amplitude Shift Keying

Frequency Shift Keying

Phase Shift Keying

Quadrature Amplitude Modulation

Topics discussed in this section:

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5 - 1 DIGITAL-TO-ANALOG CONVERSION

Digital-to-analog conversion is the process of changing one of the characteristics of an analog signal based on the information in digital data.  Aspects of Digital-to-Analog Conversion  Amplitude Shift Keying  Frequency Shift Keying  Phase Shift Keying  Quadrature Amplitude Modulation Topics discussed in this section:

Digital to Analog Conversion

 Digital data needs to be carried on an analog signal.  A carrier signal (frequency f c ) performs the function of transporting the digital data in an analog waveform.  The analog carrier signal is manipulated to uniquely identify the digital data being carried.

Figure 5.2 Types of digital-to-analog conversion

Frequency Shift Keying

 The digital data stream changes the frequency of the carrier signal, f c

 For example, a “ 1 ” could be represented by f 1 =f c +f, and a “ 0 ” could be represented by f 2 =f c

f.

Figure 5.7 Bandwidth of MFSK used in Example 5.