GNSS Software Receivers |
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| Authors: | Sergey S Pospelov Andrey L Botchkovski Peter A Krauss Stefan Berberich |
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| Institution: | (1) Soft Nav Ltd., 19 Shkiperski Protok, St. Petersburg, 199103, Russia, RU;(2) DaimlerChrysler Aerospace AG, Dornier Satellitensysteme GmbH, P. O. Box 801169, 81663 Munich, Germany, DE |
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| Abstract: | Software Global Navigation Satellite Systems (GNSS) receivers are those that implement signal correlation processing not in
hardware, but in their software. The main problem for the development of real-time software (SW) multichannel GNSS receivers
is the tremendous amount of calculations to perform signal correlation.
The article reviews recent developments of SW GNSS receivers. The emphasis is made on the computationally effective correlation
processing algorithms and the optimization of processing allocation to the receiver's hardware (HW) and SW.
An architecture is suggested that implements the PRN signals despreading in a special HW preprocessor while all the other
correlation processing functions are still kept in SW. The combination of the most time-consuming processing in HW, and all
signal structure-dependent processing in SW, enables unique flexibility of sophisticated GNSS receiver design based on inexpensive
digital signal processors. ? 2000 John Wiley & Sons, Inc. |
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