BPSK-like Methods for Hybrid-Search Acquisition of Galileo Signals

Burian, A.; Lohan, Elena Simona; Renfors, Markku

doi:10.1109/icc.2006.255493

Cited by 60 publications

(41 citation statements)

References 3 publications

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“…Unambiguous acquisition algorithms for BOC signals, have been proposed in the open literature, for example, sideband processing method -BPSK_like [3][4] have respectively proposed by Fishman and Betz [5], Martin and Heiries [6]. However, this method in the implementation process will cause energy loss of 3dB or 1dB,increase the difficulty for the receiving and processing of weak signal, but also make the correlation peak capture width decreased, reduce the code tracking accuracy.…”

Section: Unambiguous Acquisition Algorithms For Boc Signals Researchmentioning

confidence: 99%

The Research Development of Unambiguous Acquisition Methods for BOC Modulated Signals

Bai

2013

2013 International Conference on Information Technology and Applications

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The Binary Offset Carrier (BOC) modulated signal, originating from the modernized GPS proposals, is a new signal type. The spectrum of BOC signal is dissociative, which can make full use of the existing spectrum resources. According to the present research status at home and abroad, four kinds of unambiguous acquisition methods of BOC signal and its development direction are discussed in detail. All methods are simulated and verified by Matlab and the performance of their acquisition is analyzed.

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Section: Unambiguous Acquisition Algorithms For Boc Signals Researchmentioning

confidence: 99%

The Research Development of Unambiguous Acquisition Methods for BOC Modulated Signals

Bai

2013

2013 International Conference on Information Technology and Applications

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“…BOC modulated signals can be simply expressed as BOC (α, β), where Multi-peak ACF of BOC modulated signals brings in acquisition ambiguity, which makes the acquisition process more complex. Originally, unambiguous acquisition algorithm of BOC modulated signals is a sideband processing method, BPSK-like [2], proposed by Fishman and Betz, Martin and Heiries separately. Some new acquisition algorithms emerge due to the developing of the theories for BOC modulated signals.…”

Section: Introductionmentioning

confidence: 99%

The Performance Analysis of Unambiguous Acquisition Methods for BOC(m,n) Modulated Signals

Wang

Shi

et al. 2011

2011 7th International Conference on Wireless Communications, Networking and Mobile Computing

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The Binary Offset Carrier (BOC) modulated signal, originating from the modernized GPS proposals, is a new signal type. The sharp autocorrelation function (ACF) of a BOCmodulated signal can greatly improve positioning accuracy and anti-multipath performance, but its multi-peak autocorrelation function also triggers acquisition ambiguity. Based on the acquisition process of GPS signals, this paper presents two unambiguous acquisition methods of BOC-modulated signals, SCPC and Bump-Jump. Their detection probability and mean acquisition time are calculated respectively so as to make a comparison. Matlab simulation results show that the acquisition performance of Bump-Jump is better under the condition of low carrier to noise ratio (CNR).

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“…They can be filtered by one filter that has enough bandwidth for both BPSK, or each BPSK can be filtered using different filters centered at the carrier frequency +/-the sub-carrier frequency. In [3] the authors analyze the behavior of using only one BPSK signal instead of the combination of two. Another unambiguous technique that achieves the BPSK, or close, shape is based on taking out the sub-carrier component as it is usually done with the carrier [4].…”

Section: Introductionmentioning

confidence: 99%

Code smoothing for BOC ambiguity mitigation

Gallardo

Risueno²,

Crisci³

2013

2013 International Conference on Localization and GNSS (ICL-GNSS)

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The most recent generation of Global Navigation Satellite Systems (GNSS) are implementing Binary Offset Carrier (BOC) modulation. These signals are expected to provide not only better precision in the estimation of the signal's delay and phase but also more robustness to multipath effects. The advantage of BOC signals is that the main lobe of the correlation is very narrow, but on the other hand they present side lobes. For high-order signals, the amplitude of the side lobes can be similar to the amplitude of the main one or even exceed it under specific scenarios. Some techniques to mitigate the code ambiguity exploit the fact that BOC signals can be understood as the sum of two BPSK signals. Even though these techniques achieve their objective, they lose the robustness against multipath and increase the tracking noise. This paper presents a new combination between the time delay estimated by these kind of techniques and the time delay estimated using the full BOC. The idea of the combination is the same as the carrier smoothing but instead of using the carrier measurement, two code measurements are combined. Since the delay introduced by the ionosphere is the same, or very close, using the Full-BOC and the two-BPSK techniques, as it will be shown in this paper, the smoothing time can be large values, compared with the common carrier smoothing time. Several simulations of the new code smoothing strategy for different scenarios are presented in this paper.

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BPSK-like Methods for Hybrid-Search Acquisition of Galileo Signals

Cited by 60 publications

References 3 publications

The Research Development of Unambiguous Acquisition Methods for BOC Modulated Signals

The Research Development of Unambiguous Acquisition Methods for BOC Modulated Signals

The Performance Analysis of Unambiguous Acquisition Methods for BOC(m,n) Modulated Signals

Code smoothing for BOC ambiguity mitigation

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