Effective system spectral efficiency applied to a multiple high-altitude platform system

An innovative performance measure, effective system spectral efficiency (ESSE), is proposed. This new performance measure takes into account both the spectral reuse efficiency of an entire system and the spectral efficiency of an individual channel, in order to represent the efficiency of spectrum utilisation in a comprehensive way. The application of this new measure in a multiple high-altitude platform (HAP) system is presented as an example to show its superiority. It is shown that the number of HAPs can be optimised in terms of ESSE, to provide maximum capacity gains for users with a given type of antenna. It is also shown how ESSE can be effectively used to evaluate radio resource management (RRM) schemes that have contradictory performance, which is difficult to evaluate using conventional performance measures.