The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The European GNSS, Galileo is currently in its In-Orbit Validation (IOV) phase where four satellites are available for computing the user position. Galileo El OS and GPS C/A represent a very effective constellation pair in a consumer grade receiver: the signals are conveyed on the same analog path and measurements can be combined in a single position, velocity and time (PVT) solution, provided that...
The recent release, in December 2012, of the complete BeiDou B1I Interface Control Document has boosted new interest and R&D activities in the field. For a manufacturer of GNSS semiconductor devices, the first and logical step in the roadmap toward a full blown BeiDou receiver is the reuse of existing and proven silicon; the new product can blossom and reach the market more quickly, with good...
Initial results using Teseo-2 to track both Galileo IOV satellites and Compass MEO satellites are presented showing that the hardware is ready for the full constellations in both cases. Development software under test awaits satellite availability for full field testing. Future plans for other constellations and dual bands are discussed.
Both Galileo E1 OS and GLONASS L1 signals require a wider pre-correlation bandwidth than GPS C/A. The GLONASS channels are uniformly spaced on a frequency division grid, and occupy some 8MHz in total, whereas Galileo E1 OS has sidebands that are separated by about 2MHz. Being wideband is an advantage because of sharper correlation peak (Galileo) and better interference rejection; however it also exposes...
Consumer Multiconstellation silicon started with GPS-Galileo around 2007 [1], but with Glonass satellites available before Galileo, was first seen publically Teseo-2, STA8088, in 2010/11 [2,3,4]. With QZSS, Compass, GPS-L1C, Glonass-CDMA all expected, the silicon manufacturer must continue the path towards the fully flexible multi constellation receiver, otherwise the number and rate of new required...
Echo cancellation in DMT modems has been long studied as a means to improve transmission performance. Most of the current echo-canceller structures make use of FIR filters that emulate the echo-path adaptively. In frame-asynchronous operation, the misalignment of the TX and RX DFT windows (combined with other modem and channel parameters like: the transmit tone-mask and the echo-path impulse response)...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.