Summary
International Conference on Emerging Technologies for Communications
2020
Session Number:B1
Session:
Number:B1-4
Clock timing synchronization among distributed multiple antennas for LEO-MIMO communications system
Daisuke Goto, Kiyohiko Itokawa, Fumihiro Yamashita, Chihaya Kato, Mitsuhiro Nakadai,
pp.-
Publication Date:2020/12/2
Online ISSN:2188-5079
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Summary:
This paper describes multiple-input multiple-output (MIMO) techniques for downlink transmission of a single low Earth orbit (LEO) satellite equipped with multiple antennas, called LEO-MIMO, in order to increase the capacity of LEO satellite systems. The LEO-MIMO communications system performs spatial multiplexing transmission from a single LEO satellite with multiple antennas to a base station (BS) connected with multiple remote antennas. This paper describes the implementation and performance evaluation for an asynchronous LEO-MIMO receiver and demodulator. We briefly evaluate the required clock frequency precision among remotely distributed multiple antennas of BS in the LEO-MIMO communications system. Computer simulation shows that required clock frequency precision for LEO-MIMO needs to be less than 20 ppm.