This thesis addresses two fundamental improvements of satellite link budgets. On the one hand, a refinement of contemporary link budgets is proposed. Impairments crucial to satellite communications systems are characterized mathematically. Within the presented framework, the corresponding carrier-to-impairment power ratio formulas are derived. In particular, the formulas provide a faster, more accurate, and more reliable method of characterization than any other existing approaches. In this way, the assessment of the amplifier distortions contribution in the link budget is enhanced. Moreover, novel expressions for waveform imperfections, filter distortions, and oscillator noise are exposed to complement and further improve today’s link budget analyses. Ultimately, all theoretical results are thoroughly validated through numerical simulations. On the other hand, a resources optimization strategy for next-generation satellite communications systems is proposed. Indeed, ultra high-throughput satellite systems will play an essential role in future 5G-and-beyond networks with sum throughputs passing the symbolic threshold of 1 Tbits/s. Since it is especially well-suited to mobile applications such as aircraft and vessels, this work demonstrates the feasibility of real-time dynamic carrier allocation optimization. An in-depth analysis of the allocation gain, complexity, and accuracy is performed. In the end, it is highlighted that an average capacity increase per user of up to 69.7 Mbits/s can be expected in a typical scenario.     «

This thesis addresses two fundamental improvements of satellite link budgets. On the one hand, a refinement of contemporary link budgets is proposed. Impairments crucial to satellite communications systems are characterized mathematically. Within the presented framework, the corresponding carrier-to-impairment power ratio formulas are derived. In particular, the formulas provide a faster, more accurate, and more reliable method of characterization than any other existing approaches. In this way,...     »