12. The method according to claim 11 , wherein the physical transmission constraint is determined based on at least one of a coherence bandwidth and a coherence time.
12. The method according to claim 11 , wherein the physical transmission constraint is determined based on at least one of a coherence bandwidth and a coherence time. 14. The method according to claim 12 , wherein the physical transmission constraint is determined by assessing if the relationship t C >>N·T is fulfilled, wherein t C is the coherence time, N is the number of data symbols per data word and T is the duration of one of the data symbols.