A Practical Method for BEP Estimation of Convolutional Coding in Impulse Noise Environments

Eliardsson, Patrik; Axell, Erik; Komulainen, Arwid; Wiklundh, Kia; Tengstrand, Sara Orn

doi:10.1109/milcom47813.2019.9020802

Cited by 2 publications

(2 citation statements)

References 14 publications

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“…The problem then complicates for the approach to use to estimate the resulting quality: the bit error probability is discussed in Section 5, touching theoretical formulation, use of amplitude probability distribution, APD (as a new informative performance index) and more standard measurements carried out with the spectrum analyser detectors. With some initial works published 15-20 years ago [29][30][31][32], laying down the fundamentals and including the use of corrective coefficients for basic spectrum analyser measurements, research has progressed considering APD [33,34] and the extension to scenarios of multiple impulsive sources [35] and more complex message coding schemes [36].…”

Section: Introductionmentioning

confidence: 99%

The Electrical Behaviour of Railway Pantograph Arcs

Mariscotti

2023

Energies

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Electric arcing is an unavoidable consequence of the current collection process by sliding contact in railways and metros, and in general in many electrified transportation systems (ETSs). The most relevant consequences in an electrical perspective are: the occurrence of transients triggering resonant behaviour and transient responses, reduction of the energy efficiency of the system, conducted and radiated disturbance, in particular for the new radio systems widely employed for signalling and communication. The involved parameters are many (type of materials, current intensity, DC and AC supply, relative speed, temperature), as well as the studied characteristics (arc instability and lifetime, dynamic behaviour, electrical system response, radiation efficiency and coupling to external radio systems). This work reports the state of the art in arc modelling, arcing experimental characterisation, interaction with the supply system, radiated emissions and disturbance to radio systems, providing a complete description of phenomena and of reference data, critically discussing similarity and differences between sources. Proposed arc models are many with different assumptions and simplifications for various applications, so that a critical review and discussion are a necessity, considering the many different approaches and not-so-obvious applicability. The comparison with experimental results highlights unavoidable discrepancies, also because of intrinsic arc variability and for the many involved parameters and operating conditions. The impact of the arc as embedded in the railway system is then considered, speaking of conducted and radiated phenomena, including interference to radio communication systems and arc detection. The most prominent effect for conducted emissions is the excitation of system resonances, including the LC filters onboard rolling stock and substations in DC railways, with consequences for disturbance and energy efficiency, and this is discussed in detail. Conversely, for high frequency emissions, the attenuation along the line circuit is significant and the effective distance of propagation is limited; nevertheless radiated electromagnetic field emissions are a relevant source of disturbance for radio systems within the ETS premises and outside (e.g., at airports). The published approaches to quantify performance reduction are discussed with emphasis on experimental methods.

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Section: Introductionmentioning

confidence: 99%

The Electrical Behaviour of Railway Pantograph Arcs

Mariscotti

2023

Energies

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“…Since APD cannot provide information on the time patterns of a disturbance, the evaluation is usually limited to particular circumstances. For example, a method that maps the coding gain to the impulsiveness correction factor (ICF) was proposed to evaluate the performance degradation [21][22][23]. However, this method is only effective in the case of impulsive noise and requires prior simulation related to the statistics of EMI.…”

Section: Introductionmentioning

confidence: 99%

A Method to Supervise the Effect on Railway Radio Transmission of Pulsed Disturbances Based on Joint Statistical Characteristics

et al. 2020

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Radiocommunication systems between train and trackside (RSTT) carry essential information for train operations between on-board radio equipment and the related radio infrastructure located along the trackside, such as the train control, voice dispatching, command, operational information as well as the monitoring data. In a high-speed railway environment, the electromagnetic interference (EMI) has been a major threat to RSTT, and may result in critical security issues for railway transportation and even passengers. Given the complex scenario of the high-speed railway, it is significant to monitor the impact of disturbances in order to guarantee the quality of RSTT. On one hand, RSTT operate in a complex electromagnetic environment where transient disturbances coexist with permanent ones, and they both vary dramatically while the train is running. On the other hand, various radiocommunication technologies have been used for railway applications, featuring forward error-correction codes to resist EMI. Therefore, this paper puts forward a novel approach to evaluate the impact on radio transmission based on the joint statistical characteristics of time-varying EMI. This approach applies a dynamic effective signal-to-interference-plus-noise ratio mapping model to establish the relation between the block error performance of on-board radio and the joint statistical characteristics of disturbances with a mutual information-based metric. Simulations on radio transmission using Turbo coding and low-density-parity-check coding under various interferences indicate that this approach is effective to evaluate the degradation of transmission signal with forward error-correction coding due to EMI with different characteristics.

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A Practical Method for BEP Estimation of Convolutional Coding in Impulse Noise Environments

Cited by 2 publications

References 14 publications

The Electrical Behaviour of Railway Pantograph Arcs

The Electrical Behaviour of Railway Pantograph Arcs

A Method to Supervise the Effect on Railway Radio Transmission of Pulsed Disturbances Based on Joint Statistical Characteristics

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