General analytical models characterizing multipath running average error for C/A-GPS and BOC (n,n) Galileo signals

Titouni, Salem; Rouabah, Khaled; Flissi, Mustapha; Atia, Salim; Feneniche, Wafa; Chikouche, Djamel

doi:10.1109/dt.2017.8012159

Cited by 2 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In Global Navigation Satellite System (GNSS) applications, the subcarrier introduced in binary offset carrier (BOC) modulations and used as a part of the signal code permits to use efficiently the allocated frequency bands and to improve, at the same time, the acquisition and tracking performances in presence of noise, multipath (MP), and narrowband interferences . However, these modulations are limited by the ambiguity problem in the acquisition and tracking processes caused by the presence of multiple zero‐crossing points in the discriminator function (DF) at the output of the delay‐locked loop (DLL) especially in unfavorable environment .…”

Section: Introductionmentioning

confidence: 99%

Unambiguous method for DLL BOC signals tracking

Feneniche

Rouabah

Flissi

et al. 2020

Int J Communication

Self Cite

View full text Add to dashboard Cite

In this paper, we propose an efficient method for eliminating ambiguity in the acquisition and tracking processes of binary offset carrier (BOC)-modulated signals. Our contribution is realized in two stages. The first one is based on the use, at the receiver end, of optimized locally generated subcarrier sequences to get a completely unambiguous composite correlation function (CF). This first stage is used to initialize and control the second stage of the proposed method designed on the basis of a maximum likelihood algorithm (MLA) to mitigate, specifically, multipath (MP) effect. In fact, the idea is to combine, in this second stage, the received signal (affected by noise and MP) with a set of locally generated ideal BOC(m,n)-modulated signals, which are delayed and weighted by the MLA-estimated parameters of delays, amplitudes, and phases of all the MP signals, to obtain an unambiguous CF with better performance. The simulation results, based on MATLAB tool, have demonstrated that the proposed method effectively eliminates the ambiguity problem. Besides, a comparative study with several methods has shown that the proposed method grants better performance than the most popular techniques. K E Y W O R D S

show abstract

Section: Introductionmentioning

confidence: 99%

Unambiguous method for DLL BOC signals tracking

Feneniche

Rouabah

Flissi

et al. 2020

Int J Communication

Self Cite

View full text Add to dashboard Cite

show abstract

“…Some of them can be easily affected by the MPs that have a long delay (between 0.5 and 1 chips) [9,10], some others can manage to stay valid as long as the MP signals are absent and the rest of these techniques have a low elimination capability of secondary peaks and false lock points [11]. Therefore, the ambiguity is always present because of the lack of robustness of phase estimation process in degraded environment [11][12][13][14]. In order to avoid the negative impact of the MPs phenomenon, a recent method, called SDPE, is proposed in [15].…”

Section: Introductionmentioning

confidence: 99%

An Enhanced SDPE Method for Long Delay Multipath Mitigation in GNSS Applications

Feneniche

Rouabah

Flissi

et al. 2019

Smart Innovation, Systems and Technologies

Self Cite

View full text Add to dashboard Cite

In Global Navigation Satellite System (GNSS) applications, the Binary Offset Carrier (BOC) modulation provides superior benefits vis-a-vis the classical Binary Phase Shift Keying (BPSK) one. Nevertheless, this modulation type presents a major drawback due to the presence of secondary peaks in envelope of the received signal Autocorrelation Function (ACF). This is due to the fact that the ACF side peaks may create false lock points in the Discrimination Function (DF) envelope of the Delay Locked Loop (DLL) structure, producing ambiguity in both acquisition and tracking processes. In the present paper, the Strobe Double Phase Estimator (SDPE) technique for multipath (MP) effect reduction is used in BOC modulated signals acquisition and its performance is analyzed and then enhanced by applying a proposed scheme that is efficient and valid for all BOC modulated signals. The suggested method is based on the use of the SDPE approach for coherent configuration in conjunction with the same approach for non-coherent configuration. As result, the ACF resulting from this combination is unambiguous. Besides, a large evaluative comparison between the new algorithm and the SDPE technique is achieved together with a performance evaluation of the proposed method in MP environment based on the Root Mean Square Error (RMSE) criterion. The obtained results have shown that our proposed scheme presents better performances in the presence of MP.

show abstract

General analytical models characterizing multipath running average error for C/A-GPS and BOC (n,n) Galileo signals

Cited by 2 publications

References 0 publications

Unambiguous method for DLL BOC signals tracking

Unambiguous method for DLL BOC signals tracking

An Enhanced SDPE Method for Long Delay Multipath Mitigation in GNSS Applications

Contact Info

Product

Resources

About