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Technical Examples
A coding method for modulating carrier signals with 16 different digital states (4 bit signals) possesses a high synchronicity robustness and an at least partially improved coding gain. The coding parameters are obtained by the following steps: a) using a 2 ASK/8 PSK coding; b) choosing a convolutional code and determining all possible code word sequences with the free distance of the convolutional code; c) producing possible mappings by allocating a partial quantity of the 2 ASK/8 PSK channel bits to subsets; d) choosing the mapping at which, after determination of the optimum radii of the two amplitudes for every possible mapping, the resulting minimum Euclidean distance takes a maximum value between two possible subset sequences code word sequence.