Abstract:
For many decades, the amount of wireless voice and data communications has grown at an
exponential rate from one generation to other generation. Power domain non-orthogonal
multiple access (NOMA) is one of the promising approaches for achieving high data rates,
high energy efficiency, high spectral efficiency, very low bit error rate, good quality of ser vices, and low latency, as well as serving a large number of users over a single resource
and maximizing bandwidth utilization. Increased channel capacity represents an important
point in order to get higher rates.The proposed system also reduces the number of unserved
users in the given cluster. This study was conducted to explore the performance evaluation
of advanced modulations based Power domain non-orthogonal multiple access (PD-NOMA)
for 5G.
This thesis work specifically consists of three different 5G advanced modulations, such as
orthogonal frequency division multiplexing (OFDM), filter bank multi carrier (FBMC), and
universal filter multi carrier (UFMC), with the Power domain non-orthogonal multiple ac cess techniques in order to increase the channel capacity and minimize interferences among
different bands. The performance is compared interms of power spectral density(PSD), bit
error rate (BER), spectral efficiency (SE), Capacity, interference, outage probability(OP) and
computational complexity. The matlab simulation results show that, out of the three types of
advanced modulation, filter bank multi carrier can achieve the highest channel capacity en hancement and better bit error rate compared to other waveforms. The combination of power
domain, non-orthogonal multiple access, and filter bank multi carrier techniques combined
with offset quadrature amplitude modulation allows a significant increase in throughput and
a significant reduction in unserved users. Using the simulation, it has been observed that
from the result the maximum capacity value obtained for FBMC/OQAM based PD-NOMA
is greater than UFMC based PD-NOMA and OFDM based PD-NOMA in both cases of inter fereces. Intems of system complexity orthogonal frequency division multiplexing (OFDM)
is less complex than filter bank multi carrier (FBMC) polyphase network (PPN) and universal
filter multi carrier (UFMC) is the third.
