%0 Journal Article
%T Achievable rates for transmission of discrete constellations over the Gaussian MAC channe
%A Rizwan Ghaffar
%A Dimitris Toumpakaris
%A Jungwon Lee
%J Mathematics
%D 2011
%I arXiv
%X In this paper we consider the achievable rate region of the Gaussian Multiple Access Channel (MAC) when suboptimal transmission schemes are employed. Focusing on the two-user MAC and assuming uncoded Pulse Amplitude Modulation (PAM), we derive a rate region that is a pentagon, and propose a strategy with which it can be achieved. We also compare the region with outer bounds and with orthogonal transmission.
%U http://arxiv.org/abs/1102.4967v1