Satellite

Engineering

Aerospace engineering

MIMO

Fading

Real-time computing

Precoding

Scheduling (production processes)

Communications satellite

Telecommunications

Economics

Computer science

Distributed computing

Computer network

Link adaptation

Channel state information

Global Positioning System

Satellite system

Operations management

Channel (broadcasting)

GNSS applications

Wireless

IEEE Journal on Selected Areas in Communications

This paper deals with the problem of precoding, scheduling, and link adaptation in next generation mobile interactive multibeam satellite systems. In contrast to the fixed satellite services, when the user terminals move across the coverage area, additional challenges appear. Due to the time varying channel, the gateway has only access to a delayed version of the channel state information (CSI), which can eventually limit the overall system performance. However, in contrast to general multiuser multiple-input multiple-output terrestrial systems, the CSI degradation in multibeam mobile applications has a very limited impact for typical fading channel and system assumptions. Under realistic conditions, the numerical results show that precoding can offer an attractive gain in the system throughput compared with the conservative frequency reuse allocations.

Precoding, Scheduling, and Link Adaptation in Mobile Interactive Multibeam Satellite Systems