Abstract
Geostationary satellites of the Wide Area Augmentation System (WAAS) offer a novel, robust, and cost-effective means of synchronizing time at widely-separated ground facilities, to levels of ∼50ns, without the need for dedicated long-distance wired communication networks. However, reliance on satellite-based signals for time synchronization in high-reliability applications is problematic without explicit hardening against radio frequency interference (RFI). The primary innovations to be discussed in this paper are: (1) adaptive electronically-steered multi-element antenna arrays and signal processing strategies for RFI mitigation, (2) live signal, synthetic interference, and hardware-in-the-loop testing of jammer cancellation algorithms, and (3) preparations for over-the-air interference tests which will probe the effects of front-end saturation on digital beamsteering performance. We describe a hardware system assembled from readily-available commercial building blocks (data acquisition system, antennas, etc.), and a critical goal of this research is to realize significant GPS anti-jam performance in an open-architecture (or non-defense-related) platform. Therefore, the central innovations in this research enable adaptive electronic beamsteering with high-dynamic-range signals (14-bit 1/Q digitization), employing commercial off-the-shelf (COTS) hardware and computer systems, and targeted for a civilian high-reliability, high-volume (many hundreds of deployed systems) GPS timing application.
| Original language | English |
|---|---|
| Title of host publication | 23rd International Technical Meeting of the Satellite Division of the Institute of Navigation 2010, ION GNSS 2010 |
| Pages | 2106-2116 |
| Number of pages | 11 |
| Publication status | Published - 2010 Dec 1 |
| Event | 23rd International Technical Meeting of the Satellite Division of the Institute of Navigation 2010, ION GNSS 2010 - Portland, OR, United States Duration: 2010 Sep 21 → 2010 Sep 24 |
Publication series
| Name | 23rd International Technical Meeting of the Satellite Division of the Institute of Navigation 2010, ION GNSS 2010 |
|---|---|
| Volume | 3 |
Other
| Other | 23rd International Technical Meeting of the Satellite Division of the Institute of Navigation 2010, ION GNSS 2010 |
|---|---|
| Country | United States |
| City | Portland, OR |
| Period | 10/9/21 → 10/9/24 |
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All Science Journal Classification (ASJC) codes
- Computer Networks and Communications
- Communication
Cite this
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The WAAS/L5 signal for robust time transfer : Adaptive beamsteering antennas for satellite time synchronization. / De Lorenzo, David S.; Lo, Sherman C.; Seo, Jiwon; Chen, Yu Hsuan; Enge, Per K.
23rd International Technical Meeting of the Satellite Division of the Institute of Navigation 2010, ION GNSS 2010. 2010. p. 2106-2116 (23rd International Technical Meeting of the Satellite Division of the Institute of Navigation 2010, ION GNSS 2010; Vol. 3).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
TY - GEN
T1 - The WAAS/L5 signal for robust time transfer
T2 - Adaptive beamsteering antennas for satellite time synchronization
AU - De Lorenzo, David S.
AU - Lo, Sherman C.
AU - Seo, Jiwon
AU - Chen, Yu Hsuan
AU - Enge, Per K.
PY - 2010/12/1
Y1 - 2010/12/1
N2 - Geostationary satellites of the Wide Area Augmentation System (WAAS) offer a novel, robust, and cost-effective means of synchronizing time at widely-separated ground facilities, to levels of ∼50ns, without the need for dedicated long-distance wired communication networks. However, reliance on satellite-based signals for time synchronization in high-reliability applications is problematic without explicit hardening against radio frequency interference (RFI). The primary innovations to be discussed in this paper are: (1) adaptive electronically-steered multi-element antenna arrays and signal processing strategies for RFI mitigation, (2) live signal, synthetic interference, and hardware-in-the-loop testing of jammer cancellation algorithms, and (3) preparations for over-the-air interference tests which will probe the effects of front-end saturation on digital beamsteering performance. We describe a hardware system assembled from readily-available commercial building blocks (data acquisition system, antennas, etc.), and a critical goal of this research is to realize significant GPS anti-jam performance in an open-architecture (or non-defense-related) platform. Therefore, the central innovations in this research enable adaptive electronic beamsteering with high-dynamic-range signals (14-bit 1/Q digitization), employing commercial off-the-shelf (COTS) hardware and computer systems, and targeted for a civilian high-reliability, high-volume (many hundreds of deployed systems) GPS timing application.
AB - Geostationary satellites of the Wide Area Augmentation System (WAAS) offer a novel, robust, and cost-effective means of synchronizing time at widely-separated ground facilities, to levels of ∼50ns, without the need for dedicated long-distance wired communication networks. However, reliance on satellite-based signals for time synchronization in high-reliability applications is problematic without explicit hardening against radio frequency interference (RFI). The primary innovations to be discussed in this paper are: (1) adaptive electronically-steered multi-element antenna arrays and signal processing strategies for RFI mitigation, (2) live signal, synthetic interference, and hardware-in-the-loop testing of jammer cancellation algorithms, and (3) preparations for over-the-air interference tests which will probe the effects of front-end saturation on digital beamsteering performance. We describe a hardware system assembled from readily-available commercial building blocks (data acquisition system, antennas, etc.), and a critical goal of this research is to realize significant GPS anti-jam performance in an open-architecture (or non-defense-related) platform. Therefore, the central innovations in this research enable adaptive electronic beamsteering with high-dynamic-range signals (14-bit 1/Q digitization), employing commercial off-the-shelf (COTS) hardware and computer systems, and targeted for a civilian high-reliability, high-volume (many hundreds of deployed systems) GPS timing application.
UR - http://www.scopus.com/inward/record.url?scp=79959931966&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=79959931966&partnerID=8YFLogxK
M3 - Conference contribution
SN - 9781617827358
SN - 9781617827358
T3 - 23rd International Technical Meeting of the Satellite Division of the Institute of Navigation 2010, ION GNSS 2010
SP - 2106
EP - 2116
BT - 23rd International Technical Meeting of the Satellite Division of the Institute of Navigation 2010, ION GNSS 2010
ER -