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—This paper summarizes what is needed to achieve a real-time-157 dBm GPS C/A signal acquisition sensitivity in ASIC and software receiver implementations for a cold and a warm start. Two receivers (one ASIC receiver working in the time domain and one PC software receiver working in the frequency domain) are implemented in a highly efficient way. The(More)
This paper starts with a brief discussion of the Galileo project status and with a description of the present Galileo architecture (space segment, ground segment, user segment). It focuses on explaining special features compared to the American GPS system. The presentation of the user segment comprises a discussion of the actual Galileo signal structure.(More)
Since introduction of the first GPS receivers more than a quarter century ago, GNSS equipment has changed profoundly — from racks of computers and 25-pound " manpacks " into tiny integrated circuit chipsets suitable for inclusion in mobile phones and other portable devices. But the evolution of GNSS form factors is far from ended. Indeed, the appearance of(More)
I n recent years, a new trend in designing GNSS receivers has emerged that implements digitiza-tion closer to the receiver antenna front-end to create a system that works at increasingly higher frequencies and wider bandwidth. This development draws on an earlier software receiver (SR) or software defined radio (SDR) approach originating from signal(More)
In the course of this paper, a by IFEN GmbH developed integrated navigation device for aiding and rescuing fire fighters in emergency situations is presented. In areas with sufficient signal strength the respective rescue force is tracked by means of GNSS/INS position information, whereas indoor or in areas without GNSS support, the positioning is conducted(More)
I n recent years, a new trend in designing GNSS receivers has emerged that implements digitiza-tion closer to the receiver antenna front-end to create a system that works at increasingly higher frequencies and wider bandwidth. This development draws on an earlier software receiver (SR) or software defined radio (SDR) approach originating from signal(More)
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