Abstract
The performance obtained from providing worldwide interoperability for microwave access (WiMAX) from high altitude platforms (HAPs) with multiple antenna payloads is investigated, and the coexistence capability with multiple-operator terrestrial WiMAX deployments is examined. A scenario composed of a single HAP and coexisting multiple terrestrial WiMAX base stations deployed inside the HAP coverage area (with radius of 30 km) to provide services to fixed users with the antenna mounted on the roof with a directive antenna to receive signals from HAPs is proposed. A HAP cellular configuration with different possible reuse patterns is established. The coexistence performance is assessed in terms of HAP downlink and uplink performance, interfered by terrestrial WiMAX deployment. Simulation results show that it is effective to deliver WiMAX via HAPs and share the spectrum with terrestrial systems.
Highlights
Delivering worldwide interoperability for microwave access (WiMAX) services in the 3.5 GHz band from high altitude platforms (HAPs) is an effective way to provide wireless broadband communications
We have shown the performance of both downlink and uplink WiMAX broadband standard transmitted from a HAP cellular system in the 3.5 GHz band across a coverage area of 30 km radius, while operating in the same frequency band with terrestrial WiMAX deployments based on a proposed coexistence scenario
A cellular configuration has been proposed for the HAP WiMAX system based on the typical WiMAX terrestrial system
Summary
Delivering worldwide interoperability for microwave access (WiMAX) services in the 3.5 GHz band from HAPs is an effective way to provide wireless broadband communications. Investigations on HAPs have been mainly concentrated in mm-wave band and code division multiple access (CDMA) schemes delivered from HAPs. HAP systems have many characteristics including high receiver elevation angle, line of sight (LOS) transmission, large coverage area, and mobile deployment. WiMAX is a standard-based wireless technology for providing high-speed, last-mile BWA up to 50 km for fixed stations and 5–15 km for mobile stations in frequency bands ranging from 2 to 66 GHz [7]. We focus on the application scenario for delivering WiMAX IEEE802.16a from HAPs. In our scenarios, we assume fixed users with the directive antenna mounted on the roof to receive signals from HAPs. It is anticipated that providing WiMAX from HAPs is a competitive approach with a low deployment complexity of broadband services.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: EURASIP Journal on Wireless Communications and Networking
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
