In recent years, high throughput satellites (HTSs) are utilizing Ku and Ka bands with many spot beams and high frequency and polarization resuses to provide high user throughput in diverse communication applications. With regards to the wide spread of 5G in Ku and Ka bands, it is therefore necessary to realize efficient allocation of limited communication resources to the coverage area anywhere within the field of regard of an HTS by allowing flexible adjustments of power, frequency, or time resources between multi-spot beams. When an HTS adjusts the transmission power and beam directivity of each spot beam in situations where operational flexibity, exquisite coverage, and guaranteed traffic demand are unique, irregular, and not uniform, there are, however, no mathematical models for power resource allocation in which the positions of multi-spot beams are considered explicitly. In this topic, better understanding of potential relationships between the positions of multi-spot beams and the overall HTS throughput; e.g., distances between spot beams in the same frequency band and those in different frequency bands in relation to the overal system throughput is essential. In addition, practical constructs and design principles are sought for effective and responsive multi-spot beam arrangements with consideration for inter-beam interference mitigation that would break regular arrangement traditions and further enable effective power resource allocation to enhance the throughput of an HTS.

References:

1. K. D. Pham, "A Control-Theoretic Approach to Digital Beamforming for Multicast Multibeam over Satellites," IEEE Aerospace Conference, 2020

2. Z. Katona, et. al., "Performance, cost analysis, and ground segment design for ultra high throughput multi-spot beam satellite networks applying different capacity enhancing techniques," International Journal of Satellite Communications and Networking, vol. 34, no. 4, 547-573, 2016

key words

High Throughput Satellites; Digital Beamforming; Power Resource Allocation; Multi-spot Beam Arrangement

Citizenship:  Open to U.S. citizens

Level:  Open to Postdoctoral and Senior applicants