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Posts Tagged "gnss"

Autonomous vehicles demand rigorous testing that can be difficult to conduct on real roads. Here’s how we helped Italdesign create a flexible, integrated simulation platform.

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Developers of connected and autonomous vehicles are exploring the potential of RTK and PPP for precise positioning. This blog explores the need for lab-based simulation of error correction

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Developers of connected and autonomous vehicles must assess how well the vehicle’s antenna receives GNSS signals – and that requires over-the-air testing. This blog looks at the implications.

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Developers of connected autonomous vehicles must understand the impact of multipath and obscuration on the GNSS receiver. This blog explores the need for 3D simulation in the research lab.

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Positioning is a critical capability for autonomous vehicles, and requires testing over hundreds of millions of significant miles. We explore the case for simulation with hardware in the loop.

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Connected autonomous vehicles rely on a battery of sensors for position, navigation and timing. Our new blog series will look at four critical aspects of testing PNT capabilities in the lab.

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By Mia Swain On November 7, 2018
Positioning
BeiDou, BDS-3, GNSS, APAC

Since the completion of the first and second phase of the system – BDS I and BDS II - BeiDou has been widely used in China and the Asia-Pacific region. The development work on BeiDou phase 3 started 2013, and will extend BeiDou passive PNT service coverage from Asia to the whole world by approximately 2020. Here we take a look at the system development, and what Spirent is doing to support testing.

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OmniAir plugfests enable chipset, Tier2, Tier1 and OEM’s to participate in intensive bench and field testing to achieve V2X conformance/interoperability and trusted device communication. Spirent supports such events with OmniAir certified conformance test equipment for WAVE-DSRC (V2X) technology ensuring SAE and IEEE standard compliance.

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By Alain Vouffo On October 30, 2017
Networks
Automotive, testing, GNSS

Last Week, the third WAVE-DSRC plugfest took place in the Bay Area. Organized by the OmniAir Consortium,  with support from several sponsors, including Spirent, over 170 participated from more than 40 different organizations. The event was a real success and marked another milestone in the deployment of 802.11p-based V2X technology to enhance driver safety.

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Location tracking with GPS is becoming a staple feature in many consumer devices. However, consumers expect a high level of accuracy, and reviews are noting discrepancies between GPS readings from wearable devices and smartphones. In this blog we look at how wearables manufacturers can improve position accuracy.

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Recent events with GLONASS and with GPS in Australia demonstrated that navigation systems are vulnerable to software problems or glitches. The threat of jamming and spoofing are relevant for GNSS, where the power of the broadcast signals is comparatively weak (think of spotting a 40W light bulb from a few kilometres) and therefore susceptible to RF interference.

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The biggest navigation conference of the year, The Institute of Navigation’s GNSS+, came to a close last week, September 8-12. Why the “+”? To recognise that Global Navigation Satellite Systems (GNSS), although an autonomous technology, is rarely enough to assure the performance, resilience or trust that is needed for the huge range of today’s position, navigation and timing applications.

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The effects of multipath cannot be ignored as they can compromise the performance and accuracy of any receiver design. Put simply, multipath refers to the phenomenon of radio frequency (RF) signals reaching the receiver via two or more routes. It is caused by the original signal being reflected or diffracted, typically by a building, geological feature or even water.

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Whether you are developing a smartphone for immediate global sale, or designing the Global Navigation Satellite System (GNSS) technology of the future, BeiDou-2 is big news. For those outside the world of GNSS, keeping track of China’s developing satellite constellation—and its developing nomenclature—can be far from easy.

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There’s no point in having a decent car, if you spend most of your time stuck in traffic.

The thought flashes through my mind as I drive through the streets of NYC, occasionally glimpsing snarling traffic blocking avenues and cross streets. The navigation app on my smartphone helps avoid all the major blocked points - using real time, crowd-sourced traffic data and location information from thousands of users, including the frustrated ones stuck in traffic. 


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GPS specifically, and GNSS more generally, works fantastically well in its native mode of operation with an open view of the sky. High vehicle speeds, even in an aircraft manoeuvring at several times the speed of sound, are well within the capabilities of the GPS system. To use more specific language, the accuracy and continuity of positioning information is very high in open sky conditions. Back down to earth, a person walking with their GPS on the edge of the street in a typical town or c...

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