S.O.C.S (Satellite Optical Comminications System)

Code for transmitting and receiving data to/from a satellite using laser light via on-off keying (OOK). Current project scope includes:

• Physical Layer
  • OOK modulation and demodulation
  • Synchronization using integrated maximum length sequence autocorrelator and polyphase filterbank
  • Automatic gain control (to be implemented)
  • Interface with Eclypse Z7 + Zmod ADC and DAC modules (obselete)
• Data Link Layer
  • Forward Error Correction (low density parity check)
  • Cyclic redundancy check
  • Scrambling, interleaving, packetizing

All code is written in C(++) f

matlab_files

contains a range of matlab and associated files used for basic testing

• /pole_filter_phasesync_test.m is a working example of a polyphase filterbank used for phase syncronization of oversampled square wave

c_project

Contains all project code for C/C++ implementation

Development instructions:

• Install linux (preferably latest ubuntu LTS release) on a PC or in a VM
• install git, gcc, and make via command line
• Install liquid-dsp. Follow all instructions on readme
• Install VS Code and its C/C++ extension
• File -> Open Folder -> select "c_project"
• To build, open main.c and either press F5 or click Run -> Start Debugging
• To test changes to code, it is recommend to implement the functionality in fullSendTest() and debug the program. This way, the new functionality is tested in an end-to-end (transmit to receive) manner.