Reference : Massive MIMO Transmission for LEO Satellite Communications
Scientific journals : Article
Engineering, computing & technology : Computer science
http://hdl.handle.net/10993/46230
Massive MIMO Transmission for LEO Satellite Communications
English
You, L. [> >]
Li, K.-X. [> >]
Gao, X. [> >]
Xia, X.-G. [> >]
Ottersten, Björn mailto [University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) >]
Wang, Jiaheng []
8-Jun-2020
IEEE Journal on Selected Areas in Communications
38
8
1851-1865
Yes
[en] antenna arrays;channel capacity;MIMO communication;precoding;satellite antennas;satellite communication;wireless channels;LEO satellite communications;low earth orbit satellite communications;multiple-input multiple-output techniques;terrestrial communication systems;LEO satellite communication systems;massive MIMO transmission scheme;statistical channel state information;massive MIMO channel model;Low earth orbit satellites;Satellite communication;Satellites;Massive MIMO;Satellite antennas;Precoding;LEO satellite;massive MIMO;multibeam satellite;full frequency reuse;statistical CSI;user grouping
[en] Low earth orbit (LEO) satellite communications are expected to be incorporated in future wireless networks, in particular 5G and beyond networks, to provide global wireless access with enhanced data rates. Massive multiple-input multiple-output (MIMO) techniques, though widely used in terrestrial communication systems, have not been applied to LEO satellite communication systems. In this paper, we propose a massive MIMO transmission scheme with full frequency reuse (FFR) for LEO satellite communication systems and exploit statistical channel state information (sCSI) to address the difficulty of obtaining instantaneous CSI (iCSI) at the transmitter. We first establish the massive MIMO channel model for LEO satellite communications and simplify the transmission designs via performing Doppler and delay compensations at user terminals (UTs). Then, we develop the low-complexity sCSI based downlink (DL) precoder and uplink (UL) receiver in closed-form, aiming to maximize the average signal-to-leakage-plus-noise ratio (ASLNR) and the average signal-to-interference-plus-noise ratio (ASINR), respectively. It is shown that the DL ASLNRs and UL ASINRs of all UTs reach their upper bounds under some channel condition. Motivated by this, we propose a space angle based user grouping (SAUG) algorithm to schedule the served UTs into different groups, where each group of UTs use the same time and frequency resource. The proposed algorithm is asymptotically optimal in the sense that the lower and upper bounds of the achievable rate coincide when the number of satellite antennas or UT groups is sufficiently large. Numerical results demonstrate that the proposed massive MIMO transmission scheme with FFR significantly enhances the data rate of LEO satellite communication systems. Notably, the proposed sCSI based precoder and receiver achieve the similar performance with the iCSI based ones that are often infeasible in practice.
http://hdl.handle.net/10993/46230
10.1109/JSAC.2020.3000803

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