Multiplexing technology: Multi slot amplitude coding

We presented a combination of a new coding technique called Multi Slot Amplitude Coding (MSAC). By jointing Optisystem and Matlab, the coding and decoding of MSAC, Duty Cycle Division Multiplexing (DCDM) and Absolute Polar Duty Cycle Division Multiplexing (APDCDM) all are achieved in a same Free Space Optical (FSO) communication system. By comparing average energy of each symbol, different mapping rules of MSAC are compared. The simulation results of a 3-tributaries FSO system shows that MSAC can adapt to different systems and weather environment by using optimized mapping rule. Besides, at the same aggregate bit rate of 3×10 Gbps, MSAC gives a spectral width of 60 GHz, which is 25% reduction than DCDM.