Zhang Qian

TL;DR: This work investigates robust multigroup multicast transmission for frame-based multi-beam satellite communication systems with full frequency reuse and proposes a low complexity precoder for the robust power minimization problem with partial CSI and investigates user clustering which only requires partial CSI.

TL;DR: The proposed robust approach can provide substantial performance gains over the conventional approach in multibeam satellite communication systems and a low complexity precoder is proposed for it based on semidefinite relaxation and Gaussian randomization techniques.

TL;DR: In this article, the authors proposed a robust transmission method suitable for a multicast multi-beam satellite mobile communication system, which includes the following steps: firstly, considering the channellong delay characteristics in a satellite mobile communications system, and performing user grouping based on an average Euclidean distance criterion in the case that a gateway station only knows part of the channel information, adopting a random variable to characterize the channel phase uncertainty caused by the channel state information feedback delay, calculating a mathematical expectation of a signalto-interference-to-noise ratio (SINR

TL;DR: In this paper, the authors proposed a robust precoding method of a multi-beam satellite communication system based on outage probability constraint, which has the advantages of greatly reducing the transmission outage probability and improving the transmission performance.

TL;DR: In this article, the authors proposed a high energy-efficient robust precoding method suitable for a multi-beam satellite communication system, which is based on a Gaussian randomization method.