THROUGHPUT RETURNS DUE TO ADAPTIVE MODULATION TECHNIQUES
ABSTRACT: Adaptive
modulation is a powerful technique to
increases the throughput of a
wireless network by adjusting
the modulation scheme
to the channel
status. We investigate
the throughput returns due to the employments of adaptive modulation
techniques (MPSK:M-ary Phase Shift Keying
or MQAM:M-ary Quadrature
Amplitude Modulation). In
this project, the Bit Error Rate
(BER) performance and spectral efficiency of a coded adaptive modulation technique
over a multipath fading channel (no fading, flat fading and dispersive fading)
will be implemented. By using
simuation, we find
out that the
SNR increased because
higher modulation technique is use. While SNR decrease when the lower
modulation technique is use. For this case, when SNR>8dB, bit rate is
54Mbps, the 64QAM ¾ is apply and when SNR<1, bit rate is 6Mbps,
the BPSK ½ is implement.
This results in
good data rates
in the system. Therefore, Adaptive
modulation systems offer
a significant throughput
and/or power gain compared to non-adaptive transmission, particularly
when the
channel conditions are slowly time varying and a reliable feedback
channel is available.
Author: Muhammad Ikhwanus
Journal Code: jptinformatikagg130001
