Fixed Broadband Wireless Access based on HAPS using COFDM Schemes: Channel Modelling and Performance Evaluation

The high-data rate links in broadband wireless communications are being essential for a constant growth in the tough environment of radio transmissions, and orthogonal frequency division multiplexing (OFDM) can deal with these circumstances. Coded OFDM (COFDM) research in wireless communications is a concept of the well-use spectrum for robust high-data rate transmissions, and its regulation in the IEEE and ITU may have a profitable contribution in our high altitude platform (HAP) study. Moreover, HAP station (HAPS) based systems are now taking part in the world of wireless technologies to carry on with the anywhere and anytime wireless network service considerations. Due to all last considerations, HAP-channel modelling and COFDM-HAPS´ performance evaluations conform our study. For our system representation the HAP-based system and ground users are considered as fixed terminals. Herein, our stratospheric channel modelling is approximated to real transmission conditions via the experimental land mobile satellite (LMS) record adoption. Performance results by means of BER vs SNR simulations are plotted and show that our proposal can overcome the wireless link effects of frequency selectivity and multipath fading; our results can offer an alternative idea of an efficient and robust solution for distribution of broadband wireless communications.