“…For example, [3] shows that all capacity region boundary points can be achieved by single-user coding/decoding and "stripping," provided that the users split their signals into at most two components whose rate sum is equal to the users' own rate (the Manuscript received July 1, 1998; revised October 1, 1999. the material in this paper was presented in part at the IEEE International Symposium on Information Theory, MIT, Cambridge, MA, August [16][17][18][19][20][21]1998. G. Caire is with the Institute Eurocom, 06904 Sophia-Antipolis, France (e-mail: caire@eurocom.fr).…”