Comparison of sensitivity of OFDM and Wavelet Packet Modulation to time synchronization error

On the Simulation of BER Performances for Transform Schemes Used in OFDM

“…The coefficients of wavelet packet filter banks are computed with an algorithm that performs iterations of two channel filter bank decomposition or reconstruction. Wavelet packets are defined recursively in [15]. Perfect reconstruction is the main feature of wavelet which enables it to reconstruct the decomposed signal into original signal without detritions.…”

“…Longer basis function for wavelet transform provides more flexibility in design of waveform used and provides high degree of side lobe suppression [7]. [15]. Wavelet based OFDM reshapes the multicarrier transmission concept, by using wavelet carriers instead of OFDM's complex exponentials.…”

“…Unlike Fourier bases which are static sines and cosines WPMCM offers flexibility and adaptation that can be tailored to satisfy an engineering demand [15]. Flexibility is the feature of wavelets which makes it highly suitable for future generation of communication systems.…”

“…This feature together with a modular implementation complexity makes WPM a potential candidate for building highly flexible modulation schemes. The greatest motivation for pursuing WPM systems lies in the freedom they provide to communication systems designers [15]. A wavelet based systems having robustness against synchronization errors can be developed without compromising on spectral efficiency or receiver complexity by modifying the design specification [15].…”

Spectrum-Efficient Cognitive Radio Transceiver Using Multiwavelet Filters

“…Even though OFDM-based systems have been proposed to be the most promising candidate for CR transmission [2][3][4][5][6], recent research work propose waveletbased schemes to be an alternative modulation technique in terms of flexibility, adaptivity, and spectrum efficiency [7]. The efficacy of scalar wavelet packets for CR-based systems has been explored, and various results are discussed in [8][9][10][11][12][13]. Both analytical and experimental results show that scalar wavelet-based schemes insures better flexibility, sidelobe suppression, and reconfigurability at moderate complexity.…”