Digital Communication Technology

Description

Digital Communication Technology" discusses all topics of digital signal processing. Additionally attention is payed to the realisation and function of a fiber optic transmission system. Emphasis is laid upon the applications of PCM technology, e.g.: transmission of voice signals with real telephones, sound cards, CD-player etc.

Topics

• Caracteristics of pulse carriers
• Generation of PAM
• PAM (natural)
• PAM (S&H)
• PAM spectrum
• Over sampling / under sampling
• Aliasing
• Shannon theorem
• Pulse code modulation (PCM)
• Quantization linear and nonlinear
• Compression / expanding
• Code errors
• Time division multiplexing (TDM)
• Synchronization
• Quantization noise
• Difference pulse code modulation (DPCM)
• Optical signal transmission
• Signal transmission by wire (coaxial line / two-wire line)
• Simplex / duplex communication

Options

• Transmission of voice (requieres external signals as CD player, telephones etc.)
• Linear and nonlinear quantization and the influence on the quality of voice
• Duplex communication 
     - Digital Communication Technology as well as external signal sources)

Components

  - Modulator PAM (2x)

- Modulator PCM (2x)

- Clock generator

- Demodulator PAM (2x)

- Demodulator PCM (2x)

Signal sources, inputs and outputs

  - Signal source, sinewave 1 kHz

- Signal source, sinewave 2 kHz

- RJ12 socket with hybrid circuit

- Input /output for external signal sources

- Optical transmitter

- Optical receiver

- Optical fiber with connectors, 3 m

Projects

The course can be combined with other didactical systems from our product range as T 7.4.8 Radio Links by microwaves or T 7.2.6 Optical Communication.