Precise acquisition of global navigation satellite system signals in the presence of multipath and influence on tracking capability

Brahim, Fadoua; Chonavel, Thierry; Trubuil, J.; Boudraa, Abdel-Ouahab

doi:10.1049/iet-rsn.2014.0210

Cited by 7 publications

(3 citation statements)

References 17 publications

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“…Then the final correlation shape is very complicated and makes a distorted pseudorange because the weight vector is a complex number vector that has a gain and a phase. It is similar to the multipath problem that occurs in the situation of many time‐delayed signals being added together [26].…”

Section: A Problem In Stap Algorithmmentioning

confidence: 99%

Design and evaluation of symmetric space–time adaptive processing of an array antenna for precise global navigation satellite system receivers

Lee

2017

IET signal process.

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The most effective method for overcoming the interference vulnerability of global navigation satellite system (GNSS) receivers is to use an adaptive array antenna which has the capability of nulling or beamforming to a certain direction. The space-time adaptive processing (STAP) algorithm, which is very effective in signal processing of the array antenna for antiinterference, is studied. The phenomenon of pseudorange error in STAP is analysed with a new superposition method of linear line correlation functions. From this analysis, a new symmetric STAP algorithm, which uses an appropriate constraint condition for GNSS signals, is proposed to completely prevent this pseudorange error. The new STAP algorithm performance is verified and confirmed by simulations and experiments with a four-element array antenna. According to the simulation results, the new STAP algorithm has no pseudorange error, whereas the already existing STAP algorithm has an error of 1.6 m. Also experiments with four RF channels analogue-to-digital converter data and a real-time receiver confirm the effectiveness of their precise STAP algorithm which is easy to implement.

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Section: A Problem In Stap Algorithmmentioning

confidence: 99%

Design and evaluation of symmetric space–time adaptive processing of an array antenna for precise global navigation satellite system receivers

Lee

2017

IET signal process.

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“…In [15, 16], unambiguous acquisition techniques were declared for BOC of high modulation order, but the cosine‐phased BOC signals were not analysed. Brahim et

a l .

[17] studied on the presence of multipath using estimation theory for precise acquisition of BOC and multiplexed binary offset carrier signals. To solve the ambiguity problem, several tracking schemes [18–23] were proposed.…”

Section: Introductionmentioning

confidence: 99%

Improved synchronisation algorithm based on reconstructed correlation function for BOC modulation in satellite navigation and positioning system

et al. 2018

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“…Thus, it can potentially lock onto the false original peak. A high precision process method (Brahim et al, 2015) is provided by combining different correlation functions, and a time-multiplexed double strobe scheme (Liu et al, 2015) for a Time Multiplexed Binary Offset Carrier (TMBOC) modulated signal is presented to improve synchronisation performance. However, the adaptabilities of these methods are deficient because they are not suited for high-order BOC signals.…”

Section: Introductionmentioning

confidence: 99%

A Main Peak Extraction Method for High-Order BOC Signals

Liu

Feng

2017

J. Navigation

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Binary Offset Carrier (BOC) modulation signals have been applied in Global Navigation Satellite Systems (GNSS) because they offer a higher positioning accuracy and higher multipath rejection. However, there is a drawback in that the autocorrelation functions have multiple side peaks, meaning that this technique also leads to the large main peak estimation error problem and a low correlation decision efficiency problem. In this paper, we propose a new Main Peak Extraction (MPE) method for high-order BOC signals to solve these problems. In the new method, the synthesis cross-correlation function is established, and the geometry graph is formatted to calculate the estimation main peak. We eliminate all side peaks and improve the main peak phase estimation precision under the condition that the sub-carrier phase is offset. The results of the simulation demonstrate that the new method can achieve better main peak decision efficiency, side peak cancellation ability and phase estimation performance than traditional methods.

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Precise acquisition of global navigation satellite system signals in the presence of multipath and influence on tracking capability

Cited by 7 publications

References 17 publications

Design and evaluation of symmetric space–time adaptive processing of an array antenna for precise global navigation satellite system receivers

Design and evaluation of symmetric space–time adaptive processing of an array antenna for precise global navigation satellite system receivers

Improved synchronisation algorithm based on reconstructed correlation function for BOC modulation in satellite navigation and positioning system

A Main Peak Extraction Method for High-Order BOC Signals

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