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GRANADA: Receiver Analysis and Design Application |
The Galileo Receiver ANAlysis and Design Application (GRANADA) is the first open tool, running on a commercial PC under Windows, to precisely replicate a GNSS receiver HW and algorithms, integrating both GPS and the new Galileo signals. GRANADA is conceived as a modular and configurable environment for education, R&D, and testing purposes.
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The application recreates in detail the signal processing chain of a GNSS receiver. It models the RF Front end, and processes IF
measurements, including the correlation and filtering, signal and data
processing and PVT computation, allowing the use of GPS combined with
Galileo. It permits to perform analysis and trade-off of several
receiver key technologies, such as L1 signal, BOC modulation,
utilisation of the pilot tone, receiver architecture, SV selection
strategies, interference mitigation, cycle slip detecting and
correcting or multi-carrier phase ambiguity resolution. GRANADA
includes three complementary tools: the Bit-True SW Receiver
simulator, the Environment and Navigation simulator, and the Factored
Correlator Model Blockset. |  |
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GRANADA Bit-True Simulator |
The GRANADA Bit-True Software Receiver simulator recreates the Galileo/GPS signal-in-space and the receiver signal processing chain using a sampled-based simulation approach. Developed in Matlab/Simulink to provide high modularity, it targets receiver experts in the development and analysis of the receiver core technologies. The tool enables analyses and simulations of the receiver critical algorithms and architecture design, such as acquisition and tracking, AltBOC performance, MBOC signalling, multipath, and interference analysis. GRANADA can be used as a receiver design test bench that includes the possibility to integrate and analyse user defined algorithms.
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The GRANADA Environment and Navigation simulator is a Galileo/GPS raw data generator and navigation tool. It is oriented to application developers who need external access to raw measurements or PVT solution. It includes realistic characterisation of the effect of the different error components depending on the type of terminal and GNSS receiver configuration. It is possible to configure the Galileo and GPS constellations, the environmental conditions, the satellites and receiver parameters, and the navigation algorithms.
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