“…Next, we have the message-dependent iid ( md-iid ) ensemble [ 6 , 8 , 19 , 25 , 28 ], where codewords for each user are generated with i. i. d. symbols according to different distributions that depend on the full source message through the class index of the class the source message belongs to. More precisely, for user with source marginal distribution , the -th class , where , is defined as the set of all source messages whose probability is within a given interval, that is, where the thresholds are non-negative numbers, ordered from higher to lower, such that , and and .…”