Low-power signal acquisition for galileo satellite navigation system

Partanen, Tero; Sorokin, Harri; Takala, Jarmo

doi:10.1109/icecs.2008.4674923

Cited by 2 publications

(2 citation statements)

References 2 publications

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“…Computer simulations were presented to illustrate the performance of the proposed systems for the suppression of several different jammer types for a single GPS signal and then multiple GPS signals. We expect that the proposed architecture can be applied to other satellite navigation systems such as European Galileo and Chinese Compass (Beidou) because they utilize spread‐spectrum signals based on binary‐offset‐carrier modulation 30, 31.…”

Section: Discussionmentioning

confidence: 99%

A null despreader for interference suppression in GPS

Hwang

Shynk

2010

Satell Commun Network

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SUMMARYThe Global Positioning System (GPS) utilizes low-power spread-spectrum signals and thus is vulnerable to various types of high-power interference sources. It requires at least four satellites for estimating threedimensional user positions and the receiver clock bias. In this paper, we propose a blind adaptive GPS receiver that is based on a new despreader and the one-stage constant modulus (CM) array. The despreader consists of a conventional GPS despreader and a so-called null despreader, which together modify the received signal so that the CM array can extract the GPS signal of interest. The beamformer not only rejects jammers and extracts the GPS signal of interest without explicit direction-of-arrival (DOA) information of any of the signals but also it has a low computational complexity compared with conventional techniques, such as minimum-variance distortionless-response (MVDR) beamforming. As a conventional despreader can recover only one GPS signal, multiple despreaders are usually required for separating multiple GPS signals. We also explore an extension of the proposed null despreader to detect multiple GPS signals. Computer simulation examples are presented to illustrate the performance of the receiver for different types of jammer signals.

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Section: Discussionmentioning

confidence: 99%

A null despreader for interference suppression in GPS

Hwang

Shynk

2010

Satell Commun Network

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“…The oversampling factor N s in BOC‐modulated GNSS signals is typically defined as the number of samples per BOC interval

\frac{{italicT}_{italicc}}{N_{{italicB}_{1}} N_{italicB {}_{2}}}

{italicN}_{italics} ≜ {italicf}_{italics} \frac{T_{c}}{{italicN}_{B_{1}} {italicN}_{B {}_{2}}} = \frac{f_{s}}{{italicN}_{B_{1}} {italicN}_{B {}_{2}} {italicf}_{italicc}}

…”

Section: Theoretical Framework For Boc‐modulationmentioning

confidence: 99%

Cyclic Frequencies of BOC-Modulated GNSS Signals and Their Potential Within a Cognitive Positioning Framework

et al. 2014

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The cyclostationarity property of GNSS signals has not been well addressed in the specialized literature so far and its potential usefulness in the context of a GNSS receiver is yet to be studied. In our paper, we build a novel analytical framework for exploiting the cyclostationarity properties of BOC-modulated GNSS signals and we illustrate how these properties may be used in the context of a multi-system multi-frequency positioning receiver in the future. We also introduce an algorithm based on the Spectral Correlation Function (SCF) for signal identification in the context of a cognitive positioning architecture and we compare it with classical Power Spectral Density (PSD) analysis. Statistical performance is studied in the presence of stationary wideband and narrowband noise sources. It is shown that distinguishing signals based on cyclostationarity properties has high potential in future cognitive positioning receivers.

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Low-power signal acquisition for galileo satellite navigation system

Cited by 2 publications

References 2 publications

A null despreader for interference suppression in GPS

A null despreader for interference suppression in GPS

Cyclic Frequencies of BOC-Modulated GNSS Signals and Their Potential Within a Cognitive Positioning Framework

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