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The Galileo E1 Open Service signal broadcasts a navigation message containing 120 bits of information per page on the signal component E1B. This raw navigation message is ½ convolutional encoded with a Forward Error Correcting (FEC) Code. The encoded symbols are interleaved within a block interleaver size of 240 symbols and broadcast every second. The resulting data rate is 250 symbol/second. The...
This article describes a GNSS monitoring station over the L band. The monitoring is performed in two different ways: over the signal's spectrum by means of statistical analysis and in the range domain determining the horizontal protection level. The horizontal protection level ensures that the user's location is within a certain range with a certain probability and is used as input in decision making...
In recent years a number of missions have been conceived to acquire and track signals from GPS satellites at altitudes higher than the GPS constellation itself. The main purpose of SDR is to reduce the number of hardware components, projected for specific unmodifiable uses, and utilize general purpose units: on board CPU, DSP or FPGA. In this paper he study and design of a GNSS Software Receiver for...
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