Chapter 4 Transmitter and Receiver Applications AM and

Chapter 4 Transmitter and Receiver Applications Ø AM and FM Radios Ø GSM and CDMA Ø TV Transmitters and Receivers Ø Direct Broadcast Satellite (DBS) TV Huseyin Bilgekul Eeng 360 Communication Systems I Department of Electrical and Electronic Engineering Eastern Mediterranean University Eeng 360 1

Complete 88 - to 108 -MHz stereo receiver. 2

Complete 88 - to 108 -MHz stereo receiver. 3

The GSM and CDMA networks. MSC = mobile switching center; BST = base transceiver station; BSC = base station controller. 4

MTSO linking two mobile users. 5

GSM Mobile Phone Transmitter Receiver 6

CDMA Cell Phone Mobile Phone Transmitter 7

TV receiver block diagram. 8

VHF/UHF tuner block diagram. 9

Video section block diagram. 10

Composite color TV transmission. 11

Direct Broadcast Satellite (DBS) TV 12

Direct Broadcast Satellite (DBS) TV 13

DBS-TV footprint and rain regions - 4 d. B - 6 d. B - 4 d. B - 2 d. B 150 o 120 o 90 o 60 o 30 o 14

DBS TV Uplink Transmitter QPSK modulator IF amplifier upconverter LPA HPA Multiplexer M ~ MUX ~ 70 MHz LO MPEG-2 encoder ADC Analog video and audio signals MPEG 2 Digital multiplexer MUX RF LO Reed-Soloman encoder R-S Coder Other RF signals 17 GHz uplink antenna Convolutional encoder Interleaver I Conv Coder Other digital signals 15

DBS TV Receiver 12. 2 – 12. 7 GHz DBS-TV signal LNA Image rejection BPF 900 - 1400 MHz IF amplifier 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 Mixer QPSK demod Baseband amplifier D Tuned BPF Select polarization transponder Inner decoder Tuned LO DI Deinterleaver Outer decoder input Frequency synthesizer Demux MPEG-2 decoder Microprocessor D/A Analog output to TV set Video Audio 16

DBS TV Receiver Front End Image rejection Mixer BPF Ku-band LNA antenna LO 11. 3 GHz LNB mounted on antenna feed Select polarization 900 - 1400 MHz IF amplifier Coaxial cable to set top receiver 17

DBS TV Receiver IF Section Coaxial cable from antenna and LNB Baseband 900 - 1400 MHz 70 MHz amplifier IF amplifier QPSK Mixer demod D in Tuned BPF F P to select transponder Tuned LO Frequency Microprocessor synthesizer 18

DBS TV Receiver Baseband Processing Deinterleaver bits CD DI Inner convolutional decoder R-SD Outer R-S decoder De. Mux MPEG Digital demux MPEG-2 decoder D/A Video Audio Analog outputs 19