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2013/11/25 System Arch 1
SYSTEM ARCHITECTURE
ADVANCED SYSTEM ARCHITECTURE
BATEMAN
Chapter5: Bandpass digital modulation
2013/Fall-Winter Term
Monday 12:50
Room# 1-322 or 5F Meeting Room
Instructor: Fire Tom Wada, Professor
Chapter5: Bandpass digital modulation
5.1 Introduction
5.2 Amplitude Shift Keying (ASK)
5.3 Frequency Shift Keying (FSK)
5.4 Phase Shift Keying (PSK)
5.5 Comparison of binary modulation schemes
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Frequency range for communication
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Chapter5: Bandpass digital modulation
5.1 Introduction
5.2 Amplitude Shift Keying (ASK)
5.3 Frequency Shift Keying (FSK)
5.4 Phase Shift Keying (PSK)
5.5 Comparison of binary modulation schemes
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What is Amplitude Shift Keying (ASK)
Simplest form of bandpass data modulation is ASK.
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Binary ASK (1bit)
= ON-OFF Keying
8-ary ASK
8-ASK (3bit)
ASK spectrum is Symmetry
When pulse is up-converted, Symmetry
Spectrum appears!
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From page 5
Up-conversion process
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Up-conversion at TX
Double sideband spectrum
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Example 5.1
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Solution 5.1(a)From page 42
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Solution 5.1(b,c)
33dB=10𝑙𝑜𝑔10𝑆𝑁𝑅
SNR=1033
10
Generation of ASK (1)
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Linear modulation
Generation of ASK (2)
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8-ASK
Bandwidth limited ASK generation (1)
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Bandpass filtering method
Bandwidth limited ASK generation (2)
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Baseband filtering method
Detection ASK –non-coherent-(1)
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Envelop detector
Detection ASK –coherent-(2)
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Example 5.2
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Solution 5.2
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Example 5.3 constellation
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Chapter5: Bandpass digital modulation
5.1 Introduction
5.2 Amplitude Shift Keying (ASK)
5.3 Frequency Shift Keying (FSK)
5.4 Phase Shift Keying (PSK)
5.5 Comparison of binary modulation schemes
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FSK waveform
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FSK signal generation
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Example 5.4
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Solution 5.4
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Chapter5: Bandpass digital modulation
5.1 Introduction
5.2 Amplitude Shift Keying (ASK)
5.3 Frequency Shift Keying (FSK)
5.4 Phase Shift Keying (PSK)
5.5 Comparison of binary modulation schemes
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Coherent and Differential PSK
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PSK Spectrum
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PSK signal generation
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Constellation of PSK and ASK
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Need two presenter
Each presenter shall chose two problems
from 5.1 to 5.12. The one for even and the
other for odd problems.
Show your answer at the beginning of next
lecture. Each has 5 minutes.
Next lecture will be 12/2 (mon)
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