GNSS Receiver Implementation on a DSP: Status, Challenges, and Prospects
نویسنده
چکیده
A real-time GPS L1 C/A-code software receiver has been implemented on a Digital Signal Processor (DSP). The receiver exploits FFT-based techniques to perform autonomous acquisition down to a threshold of C/N0 = 33 dB-Hz. Efficient correlation algorithms and robust tracking loops enable the receiver to track an equivalent of 43 L1 C/A-code channels in real time with a tracking threshold of 25 dB-Hz. This accomplishment represents a milestone in an ongoing effort to develop a low-cost, flexible, and capable GNSS receiver for use as a scientific instrument and for GNSS receiver technology development. This paper reports on the current design and capability of the DSPbased receiver, provides an overview of the challenges that are particular to embedded GNSS software receiver design, and discusses the prospects of DSP-based GNSS software receivers in relation to the multiple frequencies and higher bandwidths offered by modernized GNSS.
منابع مشابه
Small Hydro-Power Plants in Kenya: A Review of Status, Challenges and Future Prospects
Small Hydro-power Plants (SHP) are an important source of electricity in many countries. However, little is known about SHP in Kenya. This paper reviews the status, challenges in implementation of SHP and prospects for future development of SHP in Kenya. The paper shows that SHP has not yet fully utilized the available hydro-power potential. The challenges associated with SHP development should...
متن کاملDesign and Analysis of Reconfigurable Embedded GNSS Receivers using Model-Based Design Tools
Over the next decade, civilian users will have access to multiple GNSS signal frequencies and constellations. This drastic increase in signals and their frequencies creates substantial opportunities and requirements for analysis and validation. Such analysis and validation is of significant importance from an aviation integrity perspective. The ultimate goal of our research efforts is to develo...
متن کاملChallenges and Prospects of European Railways
In the present paper, challenges and prospects of the European railways, along with a proposal for a new strategy policy and specific measures are presented. The declining course of European railways concerning traffic and revenues is first analyzed. Conditions to introduce intra - modal competition are surveyed, among them separation of infrastructure fro...
متن کاملAperture Jitter Effects in Software Radio GNSS Receivers
Increasingly, software radio techniques are being used in the implementation of communications receivers in general, and GNSS receivers in particular. In such a receiver, the received signal is sampled as close to the receive antenna as possible, and all subsequent processing uses digital signal processing (DSP) techniques. The sampling clock will suffer from phase noise instabilities, leading ...
متن کاملEvaluation of Geometric and Atmospheric Doppler for GNSS-RO Payloads
To reduce the sampling rate in global navigation satellite system (GNSS)-radio occultation receivers, it is essential to establish a suitable estimation of Doppler frequency from the received signal in the satellite onboard receiver. This receiver is usually located on low earth orbit satellite and receives GNSS satellites signal in the occultation situation. The occurred Doppler on the signal ...
متن کامل