Curriculum Objectives
* To understand basic theories of advanced digital communication system
* To design and implement digital modulator and demodulator
* To understand the applications of digital modulator and demodulator circuits.
* To be familiar with the applications of high efficiency communication modulator circuits.
Curriculum Outline
* Design and Implementation of CVSD encoder and decoder
* Design and implementation of QPSK and QAM modulators and demodulators
* Design and implementation of DSSS and BHC, and convolutional codes encoders and decoders
* Design and implementation of GMSK modulators and demodulators
ADCL-10701
Chapter 1: CVSD Modulator
Sampling frequency: 32kHz~ 50kHz
Sampling frequency Mode: TTL Level
Audio signal: 500Hz ~ 1kHz
Modulator output mode: TTL Level
Chapter 2: CVSD Demodulator
Sampling frequency: 32kHz~ 50kHz
Sampling frequency mode: TTL Level
Audio signal: 500Hz ~ 1kHz
Chapter 3: QPSK Modulator
CLK: 600 Hz ~ 1kHz
CLK mode: TTL Level
Data rate: 300 Hz ~ 500 Hz
Data mode: TTL Level
Carrier frequency: 20 kHz
Chapter 4: QPSK Demodulator
CLK: 600 Hz ~ 1kHz
CLK mode: TTL Level
Data rate: 300 Hz ~ 500 Hz
Data mode: TTL Level
Carrier frequency: 20 kHz
ADCL-10703
Chapter 5: QAM Modulator
CLK: 20 Hz ~ 200 Hz
CLK mode: TTL Level
Data rate: 10 Hz ~ 100 Hz
Data mode: TTL Level
Carrier frequency: 20 kHz
Data generated mode: Pseudo Random Generator
Chapter 6: QAM Demodulator
CLK: 20 Hz ~ 200 Hz
CLK mode: TTL Level
Data rate: 10 Hz ~ 100 Hz
Data mode: TTL Level
Carrier frequency: 20 kHz
Data generated mode: Pseudo Random Generator
Chapter 7: DSSS Encoder
Basic Spread Spectrum Encoder
Original data length: 4 bits
Data input mode: Dip Switch
Data length of spread spectrum code: 2 bits
Spread spectrum code input mode: Dip Switch
Data length after encoded: 8 bits
64-bit Spread Spectrum Encoder
Original data length: 8 bits
Data input mode: LED Display
Data length of spread spectrum code: 8 bits
Spread spectrum code input mode: Dip Switch
Data length after encoded: 64 bits
Chapter 8: DSSS Decoder
64-bit Spread Spectrum Decoder
Data length before decoded: 64 bits
Data length before encoded: 8 bits
Original data display mode: LED Display
Data length of spread spectrum code: 8 bits
Spread spectrum code input mode: Dip Switch
Chapter 9: BCH Encoder
4-bit BCH Encoder
Original data length: 4 bits
Data length after encoded : 7 bits
Error detection: 1 bit
8-bit BCH Encoder
Original data Length: 8 bits
Data length after encoded : 12 bits
Error control: 1 bit
Error detection: 1 bit
Chapter 10: BCH Decoder
4-bit BCH Decoder
Original data length: 4 bits
Data length after encoded : 7 bits
Error detection: 1 bit
8-bit BCH Decoder
Original data length: 8 bits
Data length after encoded : 12 bits
Error control: 1 bit
Error detection: 1 bit
Chapter 11: Convolutional Codes Encoder
(2.1.2) Convolutional Codes Encoder
Code rate: 1/2
CLK: 1 Hz ~ 10 Hz
Data input mode: Series Input
Data length after encoded : 2 bits
Error detection: 1 bit
(2.1.3) Convolution Codes Encoder
Code rate: 1/2
CLK: 1 Hz ~ 10 Hz
Data input mode: Series Input
Data length after encoded : 2 bits
Error detection: 1 bit
Chapter 12 : Convolutional Codes Decoder
Viterbi Decoder
CLK: 1 Hz ~ 10 Hz
Data input mode: Series Input
Data length after encoded : 2 bits
Error detection: 1 bit
GMSK Modulator
CLK: 600 Hz ~ 2kHz
CLK mode: TTL Level
Data rate: 300 Hz ~ 1 kHz
Data mode: TTL Level
Carrier frequency: 20 kHz
Modulation index: 0.5
GMSK Demodulator
CLK: 600 Hz ~ 2kHz
CLK mode: TTL Level
Data rate: 300 Hz ~ 1 kHz
Data mode: TTL Level
Carrier frequency: 20 kHz
Modulation index: 0.5
Optional Equipments
FG-442002: Function Generator and DC Power Supply (optional)
Function Generator:
Two signal output ports
Freq. Range: 10 Hz ~ 100KHz and 100Hz ~ 1 MHz
Waveforms: Sine, Triangle, Square, TTL Pulse
Amplitude: 10 Vpp
Built-in 6-digit frequency counter
Large 0.5" LED display
Overload protection
DC Power Supply:
Triple bipolar voltage output
Constant voltage operation
Low ripple and noise
Oscilloscope(Optional)
