Interference Management Schemes for High Spectral Efficiency Satellite Communications

This paper presents a short review on the main high spectral efficient systems for multibeam satellite communications. In this regard, we introduce the pros and cons of systems based on Multiuser Detection System (MUD) and Successive Interference Cancellation (SIC) applied to aggressive frequency reuse, frequency packing and Non Orthogonal Multiple Access (NOMA). Furthermore, we have also considered the presence of co-channel interference and spectrum limitations. The experimental validations have been conducted using DVB-S2 waveform. The results point out that the residual co-channel interference reduce the benefits of using frequency packing schemes. Furthermore, the best strategy to target a given FER when two streams are received with the same energy is to select a combination of low and high order modulation formats. Moreover, we investigate the effect of asynchronous reception of data streams in our previously proposed interference management scheme based on cooperative NOMA in multibeam satellite systems.