K&H KL-920
Advanced Digital Communication System

Implemented with high speed MCU, DSP and high flexible FPGA devices, giving students more opportunities to setup and observe digital data signals at each transmission stage.


Advanced Digital Communication System


  • High speed MCU, DSP and highly flexible FPGA devices
  • Digital data transmission format is integral, including start bit, preamble, identifier, data with FEC coding, CRC coding, stop bit.
  • All digital transmission data is encoded with Manchester code and transmitted via ASK or FSK modulator.
  • Programmable data, data rate, preamble, identifier, and noise from DIP switches.
  • FEC encoding, CRC mechanism, and Manchester coding can be included or ignored before wireless ISM transmission.
  • 3 sets of audio signals are sent and received over the TDMA channel via the STS1 and STM1 frames.
  • Dual channel TDM transmission of audio signals can be modulated by PCM or A-Law / μ-Law compander

Various encoding / decoding experiments

  • Manchester
  • CDMA
  • DSSS
  • μ-law
  • A-law

List of Experiments

  1. Data Spread-Spectrum Modulation and Manchester Encoding
  2. Serial Data Manchester Encoding / Decoding
  3. Spread-Spectrum Data Sampling,
  4. Decoding and Checking
  5. ASK Digital Data Transmission
  6. FSK Digital Data Transmission
  7. Data Hamming Encoding and Manchester Encoding
  8. Digital Data Decoding and Error Correction
  9. Digital Data ASK/FSK Transmission and Decoding
  10. Convolutional Encoding and Data Interleaving
  11. Viterbi Decoding and Error Correction
  12. Viterbi Decoding and FSK Transmission
  13. 64-byte Data Transmission
  14. 1-byte Data Transmission
  15. 1-byte ADC Data Transmission
  16. 10-byte ADC Data Transmission
  17. PC Digital Data Transmission
  18. SONET STS1 Multiplexing
  19. SONET STS1 Demultiplexing
  20. SONET STM1 Multiplexing
  21. SONET STM1 Demultiplexing
  22. TDM Codec
  23. DSP-Based FIR Filters
  24. Multichannel ADC
  25. SPI and Serial DAC
  26. PWM Modulation
  27. CDMA Encoding
  28. CDMA Decoding
  29. DSSS Encoding
  30. DSSS Decoding
  31. μ-Law Encoding
  32. A-Law Encoding
  33. Time Division Multiplexing and Data Compressing
  34. Time Division Demultiplexing and Data Expanding