Eeng 360 1

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• Chapter4
• Transmitter and Receiver Applications
• AM and FM Radios
• GSM and CDMA
• TV Transmitters and Receivers
• Direct Broadcast Satellite (DBS) TV

Huseyin Bilgekul Eeng360 Communication Systems
I Department of Electrical and Electronic
Engineering Eastern Mediterranean University
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Complete 88- to 108-MHz stereo receiver.
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Complete 88- to 108-MHz stereo receiver.
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The GSM and CDMA networks.
MSC mobile switching center BST base
transceiver station BSC base station
controller.
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MTSO linking two mobile users.
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GSM Mobile Phone
Transmitter
Receiver
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CDMA Cell Phone
Mobile Phone Transmitter
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TV receiver block diagram.
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VHF/UHF tuner block diagram.
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Video section block diagram.
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Composite color TV transmission.
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Direct Broadcast Satellite (DBS) TV
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Direct Broadcast Satellite (DBS) TV
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DBS-TV footprint and rain regions
- 4 dB
- 6 dB
- 4 dB

- 2 dB
150o 120o 90o
60o 30o
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DBS TV Uplink Transmitter
QPSK IF amplifier upconverter LPA
HPA Multiplexer modulator
MUX
M
17 GHz uplink antenna


Other RF signals
70 MHz LO
RF LO
Digital multiplexer
Convolutional encoder
Reed-Soloman encoder
MPEG-2 encoder
Interleaver
MPEG 2
R-S Coder
Conv Coder
ADC
MUX
I
Analog video and audio signals
Other digital signals
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DBS TV Receiver
12.2 12.7 GHz DBS-TV signal
Image rejection BPF
900 - 1400 MHz IF amplifier
LNA
Mixer
Low noise block converter mounted on antenna feed
Coaxial cable to set top receiver
Local oscillator 11.3 GHz
Ku-band antenna
900 - 1400 MHz IF amplifier
70 MHz IF amplifier
QPSK demod
Baseband amplifier
Mixer
D
Tuned BPF
input
Tuned LO
Select polarization
Select transponder
Frequency synthesizer
Microprocessor
Video
Inner decoder
Outer decoder
MPEG-2 decoder
Demux
D/A
DI
Audio
Analog output to TV set
Deinterleaver
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DBS TV Receiver Front End
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DBS TV Receiver IF Section
Coaxial cable from antenna and LNB
Baseband amplifier
900 - 1400 MHz IF amplifier
70 MHz IF amplifier
QPSK demod
Mixer
D
in
Tuned BPF
?P
F
to select transponder
Frequency synthesizer
Tuned LO
Microprocessor
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DBS TV Receiver Baseband Processing
Deinterleaver
bits
CD
DI
R-SD
Inner convolutional decoder
Outer R-S decoder
Video
DeMux
MPEG
D/A
Audio
Analog outputs
Digital demux
MPEG-2 decoder