Innovation: Indoor positioning using wearable ultra-wideband antennas
April 9, 2018
Body Fitting
Ultra-wideband is being used in a novel microwave imaging and localization system, one which features Antonio Vivaldi’s namesake antenna.
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Body Fitting
Ultra-wideband is being used in a novel microwave imaging and localization system, one which features Antonio Vivaldi’s namesake antenna.
Where Are We Now, and Where Are We Going?
In this month’s column, we travel along the road of PPP development, examine its current status, and look at where it might go in the near future.
Constellation completedThe first, or prototype, Block I QZSS satellite was launched in 2010 and, based on the positive test results from this satellite, an additional three satellites were launched in 2017, completing a four-satellite constellation. In this month’s column, we examine the recent developments of this unique and innovative navigation system.
Getting better all the time In this month’s column, we review the history and future of software-defined radios (SDRs), looking in particular at GNSS SDRs.
A review the history of the GLONASS program, its current status, and an overview the plans for the immediate future of the satellite constellation, its navigation signals and the ground support network.
How Well Does It Perform?We examine the performance of EGNOS in Finland, which lies near the northeast periphery of the coverage area, and how this performance can be improved now and in the future.
GPS + BDS RTKA GNSS receiver that can supply raw pseudorange and carrier-phase measurements now costs only a few hundred dollars, and in this month’s column, a couple of researchers from Down Under pit a couple of these receivers up against a couple of survey-grade receivers.
Current Capability and Future Promise
GPS signals are so weak, they cannot be used reliably where they are obstructed such as indoors or in concrete canyons. But if the satellites were much closer, their signals would be much stronger. The low Earth orbit Iridium constellation is already orbiting, and providing a PNT service. This month we learn about its current capability and future promise.
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