A new multi-slot and multi-level coding technique for high capacity communication system

A new multi-slot and multi-level coding technique for high capacity communication system, known as Multi Slot Amplitude Coding (MSAC) is presented. This technique offers better flexibility in terms of defining the symbol based on time slot and signal level in order to generate more unique symbols as a line code with better clock information since all the symbols have zero level (return-to-zero) at the beginning. A set of mathematical equations have been established to relate the parameters of MSAC symbol properties. Theoretical analysis to evaluate the performance of this technique based on the number of slot and the number of signal level against conventional Time Division Multiplexing (TDM), multilevel Mary signaling, and Duty Cycle Division Multiplexing (DCDM) are discussed. The comparison shows that MSAC technique is capable to maximize the number of supportable tributaries with better utilization of the slot and the signal level.