Hybrid analog-digital transmit beamforming for spectrum sharing satellite-terrestrial systems

摘要: This paper deals with the problem of hybrid analog-digital transmit beamforming under spectrum sharing constraints. Hybrid multiantenna architectures are ideal for high throughput wireless links, where full-digital solutions extremely expensive due to their number radiofrequency chains and full-analog require complex lossy networks. In contrast recent works regarding mm-wave precoding, we consider case transmitter is required limit its array gain certain angles-of-departure non-intended receivers located. great importance in 18 GHz band backhaul systems can eventually share satellite systems, leading a substantial reduction license cost. We propose general optimization framework based on an alternate that any arbitrary sub-array scheme (i.e. interleaved, localized, etc.). At each stage quadratically-constraint-quadratic-program needs be solved it requires use novel non-smooth methods. Numerical results show performance our method different scenarios schemes.