LTE uplink cellular capacity analysis in a High Altitude Platforms (HAPS) communication

High Altitude Platforms (HAPS) is a novel alternative communication system that provides the advantages of terrestrial system and satellite system. HAPS provides large coverage, able to serve users in line of sight (LOS) condition, and low propagation delay. One of the most potential HAPS applications is cellular communication which deploys LTE technology. Cellular system is widely used in wireless communication because of the high capacity. In this paper, single HAPS and multiple HAPS LTE cellular capacity analysis is proposed. Interference mechanism is calculated by considering fading channel characteristic and power control error. Channel model used is Rician fading channel with K factor gained from our earlier research. Simulation result showed that the performance of uplink LTE using SC-FDMA is improved significantly as the elevation angle increased. The result also showed for the same outage probability, single HAPS capacity is higher than multiple HAPS capacity. Therefore in multiple HAPS system, interference caused by user in overlapped region is not trivial.