  In this thesis, we study performance analysis and resource allocation designs
for non-orthogonal multiple access (NOMA) in wireless communication systems. In
contrast to conventional orthogonal multiple access (OMA) schemes, NOMA allows
multiple users to share the same degree of freedom via superposition coding and
the successive interference cancelation (SIC) decoding. Inspired by the solid
foundations from the information theory perspective, NOMA has rekindled the
interests of researchers as a benefit of the recent advancement in signal
processing and silicon technologies. However, comprehensive performance
analysis on NOMA and practical resource allocation designs to exploit potential
gains of NOMA in terms of spectral and energy efficiency have not been fully
studied and investigated in the literature. This thesis attempts to address
these problems by providing a unified performance analysis and a systematic
resource allocation design for NOMA in wireless communication systems.
