1 research outputs found
Optimized Signaling of Binary Correlated Sources over GMACs
This work focuses on the construction of optimized binary signaling schemes
for two-sender uncoded transmission of correlated sources over non-orthogonal
Gaussian multiple access channels. Specifically, signal constellations with
binary pulse-amplitude-modulation are designed for two senders to optimize the
overall system performance. Although the two senders transmit their own
messages independently, it is observed that the correlation between message
sources can be exploited to mitigate the interference present in the
non-orthogonal multiple access channel. Based on a performance analysis under
joint maximum-a-posteriori decoding, optimized constellations for various basic
waveform correlations between the senders are derived. Numerical results
further confirm the effectiveness of the proposed design.Comment: Technical Report; 22 pages, 9 figures, and 3 table