Vol.:(0123456789) Wireless Personal Communications https://doi.org/10.1007/s11277-019-06157-9 1 3 Comparative Analysis of ICI Self Cancellation Techniques for Wavelet OFDM Under Diferent Channels in Simulink Navdeep Kaur 1  · Naresh Kumar 1 © Springer Science+Business Media, LLC, part of Springer Nature 2019 Abstract Orthogonal frequency division multiplexing (OFDM) has found its place in many applica- tions due to its advantages like robustness to channel fading,spectral efciency and high data rate. Long Term Evolution and Wi-Fi utilises OFDM. Some practical limitations faced by OFDM are Inter carrier Interference(ICI) and Peak to Average Power Ratio(PAPR). Many schemes to combat the ICI and PAPR are available. In this paper, we analyze the dif- ferent ICI self cancellation techniques proposed in literature. Further, these techniques are integrated with wavelet based OFDM. ICI Self Cancellation techniques for wavelet OFDM are compared under diferent channels using Simulink. Keywords Carrier frequency ofset (CFO) · Discrete wavelet transform (DWT) · Inter carrier interference (ICI) · Orthogonal frequency division multiplexing (OFDM) · Quadrature amplitude modulation (QAM) 1 Introduction OFDM is a multi-carrier modulation technique where the carriers are choosen to be orthogonal to reduce the interference among sub-carriers and increase the spectral ef- ciency. To generate orthogonal subcarriers, employment of discrete fourier transform has been suggested by Weinstein and Ebert [1]to remove the use of sinusoidal generators and demodulators. Recent research has found that wavelet transform is a better alternative over Fourier transform [2]. A major problem faced by OFDM model is due to the distortions like carrier frequency ofset and phase noise which disturbs orthogonality and causes ICI [3]. To overcome the limitations faced by OFDM model that is intercarrier interference and peak to average power ratio, many techniques have been proposed in literature. Symmetric self cancellation was frst technique proposed in year 2000 [4] where data is sent over two carriers symmetric to each other that is x(k) = x(N − 1 − k). This led to many advancements in reducing ICI. Adjacent self cancellation (x(k) = x(k + 1)) [5], adjacent data conjugate * Navdeep Kaur navdeep07.93@gmail.com Naresh Kumar naresh_uiet@yahoo.com 1 University Institute of Engineering and Technology (UIET), Panjab University, Chandigarh, India