Why synchronization is a key issue in modern Electronic Support Measures

Seuté, Hugo; Grandin, Jean-François; Enderli, Cyrille; Khenchaf, Ali; Cexus, Jean-Christophe

doi:10.1109/irs.2015.7226343

Cited by 6 publications

(12 citation statements)

References 1 publication

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“…1b, (Fig. 4) Influence of Synchronization Impairments on an Experimental TDOA/FDOA Localization System 8 Under the hypothesis that (the base is short relative to the distance to the source) which is realistic in an airborne context, it is possible to obtain easily the CRLB (Cramér-Rao lower bound) of a position estimator of [5]: its covariance matrix can be expressed as Σ 0 ; 0 with: ,…”

Section: Methodsmentioning

confidence: 99%

“…This is a challenging scenario for a synchronized system because the measured time and frequency differences are small, thus the synchronization error must be kept as low as possible in order to have good precision [5]. In the scope of this article we will try to determine what performance in sync error we can expect in real-life situations via implementation and analysis of a full synchronization system, comprised of hardware (clocks, digital receivers) and software (delay estimation algorithm) processing.…”

Section: David Publishingmentioning

confidence: 99%

“…Many modern techniques used in passive localization now rely on time and frequency based measurements on different platforms. For example, many techniques are based on the calculation of T/FDOA (time/frequency difference of arrival) [1][2][3][4][5], and scan-based localization techniques use the dates of interception of the main lobe of a rotating emitter [6]. Since the measurements depend on the time on two or more remote platforms, several clocks are needed.…”

Section: Introductionmentioning

confidence: 99%

“…Since the measurements depend on the time on two or more remote platforms, several clocks are needed. All clocks have imperfections which make them drift, yet a single time base must be maintained all along the measurement time, hence the need to synchronize the devices [5].…”

Section: Introductionmentioning

confidence: 99%

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Influence of Synchronization Impairments on an Experimental TDOA/FDOA Localization System

Seuté¹,

Enderli²,

Grandin³

et al. 2017

JEE

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Abstract:In Electronic Warfare, and more specifically in the domain of passive localization, accurate time synchronization between platforms is decisive, especially on systems relying on TDOA (time difference of arrival) and FDOA (frequency difference of arrival). This paper investigates this issue by presenting an analysis in terms of final localization performance of an experimental passive localization system based on off-the-shelf components. This system is detailed, as well as the methodology used to carry out the acquisition of real data. This experiment has been realized with two different kinds of clock. The results are analyzed by calculating the Allan deviation and time deviation. The choice of these metrics is explained and their properties are discussed in the scope of an airborne bi-platform passive localization context. Conclusions are drawn regarding the overall localization performance of the system.

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Section: Methodsmentioning

confidence: 99%

Section: David Publishingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Influence of Synchronization Impairments on an Experimental TDOA/FDOA Localization System

Seuté¹,

Enderli²,

Grandin³

et al. 2017

JEE

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“…In several domains such as Electronic Warfare (EW), acoustics, or more recently lightning impact localization or sensor networks, the problem of passive localization based on measures of TDOA has been a central topic in many publications [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Experimental measurement of time difference of arrival

Seuté

Enderli

Grandin

et al. 2016

2016 17th International Radar Symposium (IRS)

Self Cite

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In this paper is described an experimental passive localization system based on SDR (Software Defined Radio) components. This system is designed to measure Time Differences of Arrival (TDOA) of radar pulses between two platforms. For a TDOA system, time error between the two receivers must be kept very low, which requires a very accurate way to synchronize the time bases. In this purpose, a custom offline synchronization method is proposed. The overall performances of the system are analyzed. In a small scale outdoor experiment, it has been shown to perform TDOA measurements accurately. The performances measured during this experiment are then extrapolated to a more realistic electronic warfare scenario.

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