Performance of new BOC-AW-modulated signals for GNSS system

Flissi, Mustapha; Rouabah, Khaled; Chikouche, Djamel; Mayouf, Abdehalim; Atia, Salim

doi:10.1186/1687-1499-2013-124

Cited by 12 publications

(16 citation statements)

References 7 publications

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“…Main algorithms at present against suppressing method involve time/domain filtering, spatial filtering and joint filtering technology, which are gradually maturing. And in the latter one, spoofing jamming, the jammer transmits the original satellite signal, or generates a similar signal locally by itself, so that the receiver is cheated by the signal with a different location and time information from the real signal [1]. If this interference signal is not detected and removed in time, it will lead to a great impact on the receiver's security.…”

Section: Introductionmentioning

confidence: 99%

A Suppression Method against Spoofing Jamming based on Multipath Fading Detection

Xue

2018

IOP Conf. Ser.: Earth Environ. Sci.

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Abstract. Today's interference methods to the receiver include human jamming and non-human interference, and the human one can be divided into two typessuppressing jamming and spoofing jamming. In the spoofing jamming, the jamming source transmits or generates interference signal, trapping the receiver into a wrong location and time estimation of signals from receiving the real signal. Due to its strong similarity to the real one, the interference signal is difficult to be detected and suppressed by the receiver. Thanks to the similarity between spoofing jamming signal and multipath signal, the thesis aims to improve and optimize the WRELAX algorithm -by detecting and identifying signals after WRELAX algorithm according to the multipath fading, we can, finally, separate the spoofing jamming signal and real signal.

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Section: Introductionmentioning

confidence: 99%

A Suppression Method against Spoofing Jamming based on Multipath Fading Detection

Xue

2018

IOP Conf. Ser.: Earth Environ. Sci.

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“…Thus, the true values of the phases are estimated as in the MEDLL algorithm [27]. The block diagram of our proposed method is shown in Figure 8.…”

Section: For Example (T C Is the Duration Of Prn Chip)mentioning

confidence: 99%

Side peak cancellation method for sine-BOC(m,n)-modulated GNSS signals

Attia

Rouabah

Chikouche

et al. 2014

J Wireless Com Network

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In this paper, we propose an efficient scheme for side peak cancelation in binary offset carrier (m,n) (BOC(m,n)) with integer modulation order. The proposed scheme reduces significantly the width of the main peak of the auto-correlation function (ACF) and thus the range of influence of the multipath (MP) in BOC-modulated signals. It is based on the use of reference ACFs like that of ideal pseudo random noise (PRN) code generated by linear feedback shift register (LFSR) and used in global positioning system (GPS) and the Russian Globalnaya Navigatsionnaya Sputnikovaya Sistema (GLONASS). In MP environment, the proposed method is used in combination with fast iterative maximum likelihood algorithm (FIMLA) that is adapted to future modernized GPS and Galileo signals. As a result, the obtained ACF of the proposed scheme does not contain any side peaks, and thus, the discriminator function (DF) has no ambiguity in the delay-locked loop (DLL) code tracking operation. The simulation results show that the proposed technique has superior performances in MP mitigation and permits the same resistance to noise compared to the traditional techniques.

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“…CBOC(6, 1, 1/11) is an important implementation method, where 1/11 denotes the percentage of power of BOC(6, 1) with respect to the total signal CBOC power. The PSD of CBOC(6, 1, 1/11) [13][14][15][16] is given by…”

Section: Signal Modelmentioning

confidence: 99%

SSCM: An Unambiguous Acquisition Algorithm for CBOC Modulated Signal

Feng

Fei

Liu

et al. 2017

Journal of Electrical and Computer Engineering

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Composite binary offset carrier (CBOC) signal has been widely researched in GNSS. The main ingredient of CBOC signal is BOC(1, 1) signal. Usually, the acquisition method for BOC(1, 1) signal is used to capture CBOC signal, while the research of special acquisition method for CBOC signal is rare. In this letter, according to the principle and characteristics of CBOC signal, a special side-peak cancellation method (SSCM) is proposed and simulated. In this method, two special auxiliary signals are introduced. And the local reference signals are obtained by multiplying the data channel signal and pilot channel signal by the auxiliary signals. The cross-correlation results from the received pilot signal and the two local pilot signals with different auxiliary signals will subtract from one another. Then, side peaks of correlation function and in-band noise of pilot channel are suppressed, while the data channel has the same operation results. At last the outputs of pilot channel and data channel will be added up to make full use of the received signal power. By this way, the acquisition efficiency, accuracy, and adaptability to low signal-to-noise ratio (SNR) conditions for CBOC signal have been improved, alongside possible solution when the GNSS receiver works in a critical environment.

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Performance of new BOC-AW-modulated signals for GNSS system

Cited by 12 publications

References 7 publications

A Suppression Method against Spoofing Jamming based on Multipath Fading Detection

A Suppression Method against Spoofing Jamming based on Multipath Fading Detection

Side peak cancellation method for sine-BOC(m,n)-modulated GNSS signals

SSCM: An Unambiguous Acquisition Algorithm for CBOC Modulated Signal

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