| Presentation | 2008-03-06 A Study of Frequency Dissemination over the Internet Akihiko MACHIZAWA, Tsukasa IWAMA, Hiroshi TORIYAMA, |
|---|---|
| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Many of Wireless communication systems and distributed measurement and control applications need accurate frequency. Even an atomic clock, often used as a standard frequency oscillator, needs periodic frequency calibration. Because it has frequency drift, called as ageing. We present a new frequency dissemination method using the Internet which can be used inside an building where GPS signal does not reach. Frequency difference shows clock speed. We measures one-way delay to compare two atomic clocks. The Internet traffic is not stable and the statistics of the one-way delay is not also stable. The presented method use short-time statistics of pseudo-delay which is addition of one-way delay and clock difference. Representing pseudo-delays are extracted from some short-time period with small dispersion. To evaluate proposed method, FTTH (Fiber to the home) is used as access line. We can get order of minus 11 accuracy in one-week average. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | frequency transfer / the Internet / FTTH / short term statistics / atomic clock |
| Paper # | IN2007-170 |
| Date of Issue |
| Conference Information | |
| Committee | IN |
|---|---|
| Conference Date | 2008/2/28(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | |
| Vice Chair | |
| Secretary | |
| Assistant | |
| Paper Information | |
| Registration To | Information Networks (IN) |
|---|---|
| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A Study of Frequency Dissemination over the Internet |
| Sub Title (in English) | |
| Keyword(1) | frequency transfer |
| Keyword(2) | the Internet |
| Keyword(3) | FTTH |
| Keyword(4) | short term statistics |
| Keyword(5) | atomic clock |
| 1st Author's Name | Akihiko MACHIZAWA |
| 1st Author's Affiliation | National Institute of Information and Communications Technology() |
| 2nd Author's Name | Tsukasa IWAMA |
| 2nd Author's Affiliation | National Institute of Information and Communications Technology |
| 3rd Author's Name | Hiroshi TORIYAMA |
| 3rd Author's Affiliation | National Institute of Information and Communications Technology |
| Date | 2008-03-06 |
| Paper # | IN2007-170 |
| Volume (vol) | vol.107 |
| Number (no) | 525 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |