The Downlink 4G-LTE in Fading Channel Based on the Multiwavelet Transform

Abstract

Long Term Evolution LTE is developing as a major candidate for fourth generation (4G) cellular networks and is being modified by various cellular providers to increase the capacity and speed of mobile telephone networks. The major features that discriminate LTE from other technologies at the air interface are Orthogonal Frequency Division Multiple Access OFDMA for the downlink transmission. OFDMA run into the LTE requirement for spectrum flexibility and enables cost-efficient solutions for very wide carriers with high peak rates. In this paper a proposed novel method based on the Multiwavelet Transform MWT for applying the OFDMA in LTE. The proposed scheme is verified in two channels which are flat fading and selective Fading with other related parameters such as second path gain, Doppler frequency, and path delay. The results show that the proposed system overwhelms the traditional method based on the Fast Fourier Transform FFT and give lower Bit Error Rate BER compared with the system based on FFT.