The worst thing about GPS is the coverage. GPS only works in Line of Sight, which means that you lose the signal as soon as you get indoors. Most people spend 80 to 90% of their time indoors. So there are a lot of industrial initiatives to solve the indoor positioning problem.
The simplest and most straightforward approach for finding indoor location is based on signal strength comparison (see alternative technologies). It compares the power levels of standard signals (WiFi, cellular) to guesstimate the receiver position. It is easy to set up infrastructure required for this technique, but the localization accuracy is not great. We believe users will soon demand accuracy and low power consumption beyond the capabilities of this technology. Our integrated circuits can support these demands. Hot spots with ultra-wide band extensions will become genuine location femtocells, offering top quality location services.
If you are interested in learning more about state-of-the-art Indoor Location, look to Grizzly Analytics. They are an independent consultancy firm that has been following this market for a long time.
Set Top Box
It may take some time before the infrastructure for decent coverage is
available, but installing a positioning system at home will only take a few minutes. We believe the Set Top Box, which stands at the center of the digital home, is likely to play a key role as a location center. It will host a wide range of services and will have accurate positions of all the tags in a house.