  In this work, we describe an LDPC code design framework for the unequal power
two-user Gaussian multiple access channel using EXIT charts. We show that the
sum-rate of the LDPC codes designed using our approach can get close to the
maximal sum-rate of the two-user Gaussian multiple access channel. Moreover, we
provide numerical simulation results that demonstrate the excellent
finite-length performance of the designed LDPC codes.
