Design and development of a Transparent Digital Transmodulator (TDT)

In this project we developed a TDT to operate in Satellite Master Antenna TV (SMATV) systems. The goal of the TDT is to transmodulate the digital TV signal from the satellite link modulation (QPSK) to the cable modulation format (64-QAM). The main tasks of the TDT are: QPSK demodulation, forward error correcting code (Reed-Solomon y Viterbi) and QAM modulation. A new Reed-Solomon encoder is introduced as a channel encoder for the cable link. For the design of the TDT we used chips from LSI LOGIC. More than 50000 units of the final product were sold by IKUSI in several countries.