Spectral efficiency enhancement through Wavelet Transform (WT) for 5G

Huge data transmission rate is the key requirement in 5^th Generation of wireless communication for various applications like sports, video, Medical etc. To meet high data rate one can increase the bandwidth by using higher frequency bands which is not possible due to limited availability of frequency spectrum and constraint put by Standard on available spectrums. Another method is to use available spectrum efficiently. OFDM surpasses all multiplexing techniques in last decade because it provides improvement over Inter Symbol Interference (ISI) with the help of Cyclic Prefix(CP) and improved Bit Error Rate (BER). It provides low sensitivity to time synchronization due to inter carrier orthogonality. Besides all these advantages, bandwidth gets wasted because of CP. Also multipath fading causes loss of orthogonality of carriers which give Inter Carrier Interference (ICI). Discrete Wavelet Transform can be used to remove CP which in turn increases the bandwidth and finally improves spectral efficiency. Also Wavelet Transform (WT) is less sensitive to multipath fading so there is improvement in ICI.