Abstract
The Collective Detection (CD) technique is a promising approach to meet the requirements for signal acquisition in GNSS-harsh environments. The CD approach has been proposed because of its potential to operate as both a direct positioning method and a high-sensitivity acquisition method. This paper is dedicated to the development of a new CD architecture for processing satellite signals in challenging environments. It proposes the best signal acquisition method used according to the reception conditions of the different receivers that can assist the user in difficulty. Knowing that the CD approach is beneficial in the case where the maximum of satellite signals can be combined, the proposed approach consists in choosing the best receiver(s) from several connected receivers to serve as a reference station, as smart cooperative navigation concept. New metrics of the CD with optimal weighting of visible satellites are exploited. Analysis of optimization method in order to use better satellites according to some defined parameters (elevation, , and GDOP) were carried out. Real GPS L1 C/A signals are exploited to analyze the efficiency of the proposed approach. A comparison of the results through the accumulation of some good satellites among all visible satellites have shown the effectiveness of this method.
Highlights
In recent years, the interest in positioning and navigation has become increasingly important, as evidenced by systems and services developed using this technology
The use of GNSS receivers has increased considerably with the integration of GNSS chips in cellular phones and mobile devices that are used for potential applications in several domains, including location-based services (LBS)
The diversity and redundancy of GNSS measurements will further open the door to new developments and applications that are impossible to achieve with current receivers, which are designed for outdoor environments
Summary
The interest in positioning and navigation has become increasingly important, as evidenced by systems and services developed using this technology. Increasing the number of GNSS signals and the diversity of navigation satellites is an important advantage, because it can improve the overall performance of the signal processing in a multi-constellation multi-frequency hybrid architecture. Traditional satellite navigation receivers must be improved in order to allow the reception of all GNSS signals (current and future). These receivers must be designed to acquire as many satellite signals as possible from different constellations. Increasing the number of signals and the diversity of GNSS satellites provides significant benefits in many areas of application because it can improve the sensitivity performance of the signal processing in a hybrid architecture combining all GNSS signals
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