NTT and FURUNO ELECTRIC: GPS Time Synchronization with World-Class Accuracy Using a Few Selected Satellites

—Multi-path-tolerant GNSS receiver developed, dramatically increasing accuracy in severe environments—

TOKYO-Tuesday 30 October 2018 [ AETOS Wire ]

(BUSINESS WIRE) -- Nippon Telegraph and Telephone Corporation (TOKYO: 9432) (NTT, Head office: Chiyoda-ku Tokyo; President & CEO: Jun Sawada) and FURUNO ELECTRIC CO., LTD. (TOKYO: 6814) (FURUNO, Head office: Nishinomiya, Hyogo Prefecture, President: Yukio Furuno) have developed a receiver for GPS and other global navigation satellite systems (GNSS), dramatically improving time-synchronization accuracy in areas with severe reception conditions such as among buildings and in mountainous areas.

By integrating a new satellite signal selection algorithm developed by NTT into a time synchronization GNSS receiver from FURUNO, in addition to signals from satellites in line-of-sight locations, it has become possible to use multi-path signals (reflected or diffracted from buildings and other structures), which previously inhibited accuracy of time synchronization. In a real multi-path reception test environment, time error was reduced to approximately 1/5 of earlier values. This is a remarkable result in that it promises to enable time synchronization accuracy close to that obtained in open-sky reception environments with no obstructions, even in environments previously considered poor and unsuitable for accurate time synchronization, such as among buildings or in mountainous areas.

FURUNO plans to begin sales of their new GF-88 series time synchronization GNSS receivers incorporating this new technology in April of 2019, and to deploy it widely in fields such as 4G/5G mobile base stations, financial trading, power grids, and data centers.

We plan to exhibit these results at Tsukuba Forum 2018 *1 on October 25 and 26 (https://www.tsukuba-forum.jp/e/index.html), and at ITSF 2018 *2 , in Bucharest, Romania on November 5 to 8 (http://itsf2018.executiveindustryevents.com).

For details, please visit the following URLs:
http://www.ntt.co.jp/news2018/1810e/181023a.html
https://www.furuno.co.jp/en/news/general/general_category.html?itemid=728&dispmid=961



Reference/Terminology descriptions

*1 Tsukuba Forum 2018

         
The largest general symposium on various technologies related to access networks in Japan, held by NTT.

         
https://www.tsukuba-forum.jp/e/index.html

*2 The International Timing & Sync Forum (ITSF) 2018

         
The largest conference in the world on the theme of network timing and synchronization, covering fields including communications, finance, energy, transport, broadcast and defense.

         
http://itsf2018.executiveindustryevents.com



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Contacts
For inquiries regarding this article
Nippon Telegraph and Telephone Corporation
Information Network Laboratory Group, Planning Department, Public Relations Office
inlg-pr-pb-ml@hco.ntt.co.jp
or
FURUNO ELECTRIC CO., LTD.
Mr. Kazushi Yamada
Management Planning & Intelligence Dept., Public Relations Office
kazushi.yamada.dg@furuno.co.jp

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