Timing Synchronization Optimization for Satellite Mobile Communication Based on LMS Estimation

The uplink timing error using Long Term Evolution(LTE) communication standards will affect the orthogonality of single-carrier frequency division multiple access technology(SC-FDMA) in Geostationary Earth Orbit(GEO) satellite mobile communication system. To solve this problem, an SC-FDMA timing sync...

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Bibliographic Details
Published in:Dianxun Jishu / Telecommunications Engineering 2014-07, Vol.54 (7), p.945-950
Main Authors: Wang, Jun-Fei, Cui, Wei-Jia, Wang, Da-Ming
Format: Article
Language:Chinese
Subjects:
Communication satellites
Frame structures
Mobile communication systems
Satellites
Synchronism
Time measurements
Uplinking
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Summary:The uplink timing error using Long Term Evolution(LTE) communication standards will affect the orthogonality of single-carrier frequency division multiple access technology(SC-FDMA) in Geostationary Earth Orbit(GEO) satellite mobile communication system. To solve this problem, an SC-FDMA timing synchronization optimization method based on LMS linear estimation algorithm is proposed. The method estimates the changes in transmission delay between the user and the satellite, and reduces uplink timing error through closed-loop control compensation. The simulation results show that the method can protect user uplink signal orthogonality and avoid intersymbol interference with about 9% transmission rate loss when the LTE standard frame structure is used, which is much lower than that of traditional method in which the frame structure is expanded. The advantages of the method are demonstrated.
ISSN:1001-893X
DOI:10.3969/j.issn.1001-893x.2014.07.015