Hi everyone! I'm a student of electronic engineering and as a final project, im working on the reengineering of a modem that implements the Q15X25 modulation, I am very disoriented as lack of documentation. It is implemented over a motorola DSP, but im going to implement it on FPGA, I believe that work can contribute to the community, because the DSP that was first implemented is obsolete . Would you be so kind to help me? I need to know how the synchronism is applied and how the frames are sent. Any information would be very grateful.