Performance Analysis of a Novel OFDM System Based on Dual – Tree Complex Wavelet Transform (DT-CWT)

As demand for higher data rates is continuously rising, there is always a need
to develop more efficient wireless communication systems. The work
described in this paper is an effort in this direction. We have proposed a
novel OFDM system base on DT-CWT. In the proposed scheme, DT-CWT
is used in the place of FFT. The proposed scheme offers the best PAPR
performance than the conventional OFDM and wavelet packet modulation
(WPM) systems at the expense of acceptable computational complexity
without using any pruning techniques. The complementary cumulative
distribution function (CCDF) of PAPR for the proposed scheme signal
achieves about 3 dB improvement in PAPR over the traditional OFDM and
WPM signals at 0.1% of CCDF. Also the proposed scheme achieves
excellent improvements in BER over conventional OFDM and WPM
systems. The need for CP is eliminated in the system design due to the good
orthogonality and time frequency localization proprieties of the wavelet.