Özet
Multicarrier systems are preferred today due to their robustness to the multipath effects
and using fast fourier transform(FFT) easily to feasible and more efficient in many communication
systems. Orthogonal Frequency Division Multiplexing (OFDM) system is a
multicarrier system that allows a high speed broadband system is divided into lower
speed signals at narrowband. In OFDM subcarriers are chosen orthogonal to each other
pass through the flat fading channel improves the system performance. In many studies
for next-generation communication systems, there is research on a system known
as filter bank multicarrier (FBMC) which is an alternative to OFDM, uses faster fading
signal shaping filters and more efficient because it does not use cyclic prefix.
Many factors such as delay spread of the channel, doppler shift in wireless channels,
the difference between receiver and transmitter oscillators cause inter symbol interefence
(ISI) and intercarrier interference (ICI) and due to these interferences FBMC system
performance also reduce as well as in OFDM system.
The FBMC system is analyzed due to the its sensitivity to carrier frequency offset (CFO)
and timing offset (TO) , which reduces its performance. In these analyses, Staggered
Multitone Modulation(SMT) on the class of FBMC system that are based on quadrature
amplitude modulation (OQAM) is used. The signal to interference ratio (SIR) is calculated
without any of the assumption which are CFO and TO is so small in the system
and the channel is flat fading. The results without assumption is analyzed in the small,
medium and high delay spread areas. With this thesis, the changing in the power delay
profile(PDP) of the channel is shown the effect on the FBMC system performance.
Furthermore, in the AWGN channel , the performance of the OFDM and the FBMC
system which are affected by the CFO and TO is observed due to the changing in the
subcarrier number.
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