Bit Error Rate Mitigation in VANETs Using FFH-OFDM Pre-coding Approach

Ntaganda, James; Ntagwirumugara, Etienne; Musabe, Richard

doi:10.1109/iconic.2018.8601230

Cited by 6 publications

(3 citation statements)

References 22 publications

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“…The BB-FH-OFDM method has low hardware complexity compared with RF-FH-OFDM [52]. Despite the contributions of [51] and [52], these works merely focused on the performance of FH-OFDM based on radio channel models [53] as defined by ETSI/ITU and vehicular ad-hoc Network standards [54]. In the present work, a novel FH method based on optical OFDM in VLC networks is proposed.…”

Section: Introductionmentioning

confidence: 99%

Improving Availability and Confidentiality via Hyperchaotic Baseband Frequency Hopping Based on Optical OFDM in VLC Networks

2020

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The security in visible-light communication (VLC) networks has recently gained attention. This work presents a hyperchaotic baseband frequency hopping method based on optical orthogonal frequency-division multiplexing (Hyperchaos-BB-FH-OOFDM) that can enhance both confidentiality and availability in VLC networks. A four-dimensional hyperchaotic scheme is employed for chaotic mapping. The proposed method exploits the random feature of the input data and chaotic codes to improve the confidentiality against correlation and statistical attacks and to improve the availability against illumination, disguised, and noise jamming. Using the chaotic scheme, the bipolar real OFDM samples are exploited to create dynamic cypher keys and spreading codes that are updated at each frame throughout the entire session, leading to high security against malicious attacks. The proposed method employs a four-fold encryption approach that involves chaotic frequency/time-domain scrambling of OFDM subcarriers, chaotic phase scrambling of frequency-domain subcarriers, and chaotic spreading of the OFDM signals upon transmission. According to the results, in addition to enhancing the confidentiality and availability, the method supports multiplexing, reduces the peak-to-average-power ratio of the OFDM signal, and improves the bit error rate performance for OFDM-based VLC networks.

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Section: Introductionmentioning

confidence: 99%

Improving Availability and Confidentiality via Hyperchaotic Baseband Frequency Hopping Based on Optical OFDM in VLC Networks

2020

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“…When they report such detection, the transmissions of their reports may interfere with each other due to the wireless broadcast property. Such interference easily causes packet loss, data errors, or long transmission delays [6]- [9], negatively affecting the report quality received at receivers. In another words, the trustiness of vehicle reports not only relies on vehicles' credibility and behaviour but also is affected by transmission quality.…”

Section: Introductionmentioning

confidence: 99%

A Vehicle Transmission Scheduling Scheme for Supporting Vehicle Trust Management

Hu,

2020

Preprint

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Recent developments in advanced sensors, wireless communications and intelligent vehicle control technologies have enabled vehicles to detect traffic anomalies on the road and then notify surrounding vehicles to improve traffic safety. However, due to the high-speed movement of vehicles and the frequent topological changes between vehicles, it is difficult for vehicles to evaluate the credibility of received messages. Quite a lot of research effort has been carried out to establish various trustworthiness platforms. These studies mostly focus on how to enhance the accuracy of credibility evaluation, overlooking that the transmission performance may affect the quality of vehicle messages. In this paper, we aim to support the improvement of credibility evaluation in vehicle networks by enhancing the transmission experience of vehicles. The proposed solution utilizes the vehicle's trajectory information, detection range and a roadside unit (RSU) coverage to form a controlled number of detection zones, which guarantees that events can be detected and reported while limiting the number of transmission vehicles. Furthermore, our scheme takes account of vehicle credibility and interference ranges when selecting reporting vehicles, supporting the timely and reliable delivery of vehicles event reports when accidents occur. Our ns2 evaluation shows that our scheme can greatly reduce delay and loss rates of vehicle messages to help existing studies on accurate vehicle credibility evaluation.

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“…Introduction: For reliable communications in the presence of partialband noise jamming (PBNJ), fast frequency hopping (FFH) system with L hops/bit (multiple hops per bit) is often employed. At the receiver end, diversity-combining techniques are usually used to achieve considerable performance gain [1][2][3][4][5]. In the past, it was shown that some of these diversity-combining techniques require the side information which is difficult for extraction while others can work well when side information is not available.…”

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confidence: 99%

F distribution in FFH/binary FSK system with dividing combining receiver

et al. 2019

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Fast frequency hopping (FFH) is a useful anti-jamming method. Many diversity combining methods are used to combat partial-band interference in FFH systems, including linear and non-linear combining receivers. In fifth-generation scenarios, FFH technique may take an important role in OFDM mode. In early works, a nonlinear combining receiver in FFH/binary FSK system named division-combining receiver (DCR) was proposed. It was found that the random variables for decision in the DCR are F-distributed under partial-band noise jamming over additive white Gaussian noise channel, which could be used for performance analysis and the probability computation of bit error. In this Letter, the specific presentations of DCR and its F-distribution characteristics are investigated. Simulations show that DCR receiver has a light advantage among non-linear receivers.

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Bit Error Rate Mitigation in VANETs Using FFH-OFDM Pre-coding Approach

Cited by 6 publications

References 22 publications

Improving Availability and Confidentiality via Hyperchaotic Baseband Frequency Hopping Based on Optical OFDM in VLC Networks

Improving Availability and Confidentiality via Hyperchaotic Baseband Frequency Hopping Based on Optical OFDM in VLC Networks

A Vehicle Transmission Scheduling Scheme for Supporting Vehicle Trust Management

F distribution in FFH/binary FSK system with dividing combining receiver

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