Fsk modulatio & demodulation

Continuous-Phase Frequency Shift
Keying (FSK)
Contents
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FSK-1
FSK-2
FSK-3
FSK-4
FSK-5
FSK-6
FSK-7
FSK-8
FSK-9
FSK-10
FSK-11
FSK-12
FSK-15
FSK-16
FSK-17
FSK-18
FSK-19
FSK-20
FSK-22
FSK-23

Introduction
The FSK Transmitter
The FSK Transmitter (cont. 1)
The FSK Transmitter (cont. 2)
The FSK Transmitter (cont. 3)
The FSK Transmitter (cont. 4)
The FSK Transmitter (cont. 5)
FSK Power Spectral Density
FSK Power Spectrum (cont. 1)
FSK Power Spectrum (cont. 2)
FSK Power Spectrum (cont. 2)
Spectrum with Rectangular Pulses
Specific Examples of FSK Spectra
Spectra for M = 2
Spectra for M = 4
FSK Demodulation
The Frequency Discriminator
Discriminator Block Diagram
Example of Discriminator Output
An Approximate Discriminator

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FSK-25
FSK-26
FSK-28
FSK-29
FSK-30
FSK-31
FSK-32
FSK-33
FSK-34
FSK-35
FSK-36
FSK-37
FSK-38
FSK-40
FSK-41
FSK-42

Slide FSK-43
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Slide FSK-46
Slide FSK-47

Symbol Clock Tracking
Symbol Clock Tracking
The Phase-Locked Loop
The Phase-Locked Loop (cont. 1)
The Phase-Locked Loop (cont. 2)
The Phase-Locked Loop (cont. 3)
The Phase-Locked Loop (cont. 4)
The Phase-Locked Loop (cont. 5)
Example of PLL Output
Detection by Tone Filters
Detection by Tone Filters (cont. 1)
Computing Ik (N ) by Integration
Computing Ik (N ) by Filters
Discrete-Time Tone Filters
Filter Implementation (cont. 1)
Discrete-Time Filter Frequency
Response
Block Diagram of Receiver Using
Tone Filters
Efficient Computation with FIR Tone
Filters
Block Diagram of Receiver Using
Tone Filters
Recursive Implementation of the Tone
Filters
Recursive Implementation (cont. 1)

Slide FSK-48 Computation for the Recursive
Implementation