COMMENTS ON 'DIVERSITY ALOHA'.

In a recent paper, a generalization of the slotted ALOHA random access scheme is considered in which a user transmits multiple copies of the same packet. In frequency diversity ALOHA, multiple copies of the same packet are simultaneously transmitted on different channels. The analysis for one of the proposed schemes, namely, channel selection without replacement is found to be incorrect. These comments contain a counterexample to the published results and a correct version of the analysis.link_to_subscribed_fulltex