AX.25 Protocol Compatible Reconfigurable 2/4 FSK Modulator Design for Nano/Micro-Satellites

Dilek S. M. , Ayranci A., Seker A., Ceylan O., Yağcı H. B.

20th Telecommunications Forum, Belgrade, Serbia And Montenegro, 20 - 22 November 2012, pp.416-419 identifier

  • Publication Type: Conference Paper / Full Text
  • City: Belgrade
  • Country: Serbia And Montenegro
  • Page Numbers: pp.416-419


In this paper, implementation of a FPGA-based and VHDL coded reconfigurable frequency shift keying (FSK) modulator for nano-satellite communication systems is presented. Reconfigurable FSK modulator includes 2-FSK and 4-FSK modulators. The system is compatible with AX.25 data link layer protocol for general amateur radio communication which is popular in micro/nano satellite communication. ROM based direct digital synthesizer (DDS) generates a sinusoidal wave at the output with a specified frequency and phase.