Effect of Antenna Power Roll-Off on Performance and Coverage of 4G Cellular Network from High Altitude Platforms

摘要

This paper investigates the effect of antenna power roll-off on 4G cellular networks from high altitude platform (HAP). This work proposes the deployment of HAP to link long distant separated base transceiver station (BTS) and those separated by bad terrain that will otherwise need a full terrestrial network to link to the core network. The paper also investigates the power roll-off for 4G and its effect on coverage extension. It investigates the best trajectory path for aerodynamic HAP. It also investigates the effect of varying antenna configurations such as the frequency, bandwidth and transmitting power on system coverage. Simulation results show that 200km coverage can be maintained by keeping a reduced trajectory path of 10km. Also maintaining a transmit power of 35dBm at 3.5GHz and 100MHz bandwidth with a roll-off factor of 5 can give a coverage of up to 200km.