This paper proposes an innovative multifrequency and low-cost SDR receiver architecture able to track new and/or modernized GNSS signals, exploiting and extending previous work on L5 aiding strategy [1]. The main advantages of the proposed architecture are: • the presence of a single Analog-to-Digital Converter (ADC), which means having a simple and low-cost front-end able to receive multiple GNSS signals in a single data stream; • the flexibility and the interoperability among two or more bands and different systems. This approach paves the way for an easy design of novel receiver algorithms, leading to better performance, robustness and reconfigurability at the cost of an increased computational burden. In detail, it allows the implementation of aiding strategies able to exploit the acquisition of a simple signal (e.g. L1) to aid the acquisition of another more complex signal (e.g. L5, L2C), or the development of novel "smart" tracking algorithms. The design of the frequency plan (Intermediate Frequency - IF - and sampling frequency) and the front-end filters is a critical task implying a trade-off between cost and performance. Therefore, a reduced sampling frequency (low-cost ADC) leads to spectral overlapping between downconverted signals, showing cross-correlations and slightly affecting the actual performance.

Multiband acquisition algorithm exploiting single ADC / Cristaldi, D. F.; LO PRESTI, Letizia. - STAMPA. - (2010), pp. 1-7. (Intervento presentato al convegno GNSS European Navigation Conference 2010 tenutosi a Braunschweig, Germany nel 19 - 21 October 2010).

Multiband acquisition algorithm exploiting single ADC

LO PRESTI, Letizia
2010

Abstract

This paper proposes an innovative multifrequency and low-cost SDR receiver architecture able to track new and/or modernized GNSS signals, exploiting and extending previous work on L5 aiding strategy [1]. The main advantages of the proposed architecture are: • the presence of a single Analog-to-Digital Converter (ADC), which means having a simple and low-cost front-end able to receive multiple GNSS signals in a single data stream; • the flexibility and the interoperability among two or more bands and different systems. This approach paves the way for an easy design of novel receiver algorithms, leading to better performance, robustness and reconfigurability at the cost of an increased computational burden. In detail, it allows the implementation of aiding strategies able to exploit the acquisition of a simple signal (e.g. L1) to aid the acquisition of another more complex signal (e.g. L5, L2C), or the development of novel "smart" tracking algorithms. The design of the frequency plan (Intermediate Frequency - IF - and sampling frequency) and the front-end filters is a critical task implying a trade-off between cost and performance. Therefore, a reduced sampling frequency (low-cost ADC) leads to spectral overlapping between downconverted signals, showing cross-correlations and slightly affecting the actual performance.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2420727
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