Enhancement LTE System Based on DWT and Four STBC Transmit Antennas in Multichannel Models

Abstract

In this paper Enhancement detail for the two main applications of Long Term Evolution (LTE) these are fixed and Mobile LTE. Fixed LTE will send the data from a single point-to-multipoint like user's houses and companies. While full mobility achieved by Mobile LTE to cellular networks. This done at very high broadband data rate comparted with other broadband networks like WiMax and Wi-Fi. The two types of LTE above are used in planning of a proper network which offers better throughput wireless broadband connectivity with lower cost. This work present a new proposed structures for LTE based on Space Time Block Coding (STBC-LTE) and Discrete Wavelets Transform (DWT) as multicarrier. The purpose of these new proposed structures is to improve the performance of bit error rate (BER) compared with the conventional STBC-LTE that use fast Fourier transform (FFT) as multicarrier. In addition, the new proposed structures with more than three transmits antennas and DWT was used in first time in LTE systems to enhance spectral efficiency and supports BER performance. The proposed STBC- LTE systems have been examined under different channel models like “AWGN, flat fading, and three types of multipath selective fading channel models (Extended Pedestrian, Extended Vehicular and Extended Typical Urban)”. The simulation results achieved in this work show that STBC- LTE based on DWT with four transmits antennas given best between other conventional STBC-LTE based on FFT systems. All these LTE systems models were built using MATLAB 2014a to permit various system parameters to be changed and tested like signal to noise ratio (SNR) and maximum Doppler shift and type of channel and channel parameters of the system.