Design and Performance Evaluation of OFDM-Based Wireless Services Employing Radio over Optical Wireless Link

Jiang, Leng; Noonpakdee, Wasinee; Shimamoto, Shigeru

doi:10.5121/ijwmn.2011.3514

Cited by 5 publications

(6 citation statements)

References 14 publications

(8 reference statements)

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“…Any communications system within the hospital should not generate significant EMI and have no EMC problems. Some new wireless systems have been proposed, just like optical wireless network [16]. Here we consider using ultrasound wave for wireless communication system in hospital.…”

Section: Apparatus and Experimentsmentioning

confidence: 99%

Amplitude and Phase Modulation for Ultrasonic Wireless Communication

Gao¹,

Shimamoto²

2014

IJWMN

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Short range wireless communications have been used more and more frequently in our life. But the electromagnetic fields waves also have some disadvantages. One of these disadvantages is health problems. Many studies shows the electromagnetic field waves using for communication may damage our health. And in most hospitals, they also have bans on the use of mobile phones and wide area networks because of Electromagnetic Interference. So this paper studied the use of ultrasound for wireless communication in air, instead of using electromagnetic field wave. In order to find an advisable modulation method for ultrasound wireless communication, Amplitude modulation method and Phased modulation method has been test.

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Section: Apparatus and Experimentsmentioning

confidence: 99%

Amplitude and Phase Modulation for Ultrasonic Wireless Communication

Gao¹,

Shimamoto²

2014

IJWMN

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“…OFDM is one of the prominent schemes which provide higher immunity to multipath fading and decrease the complexity of the hardware . This technology has been integrated into current wireless mobile communication equipment and devices such as high‐performance local area networks (HIPERLAN), IEEE802.11a local area network (LAN), IEEE802.16, Wi‐Max, digital audio broadcast (DAB), digital video broadcast (DVB), high‐definition television (HDTV), and next‐generation mobile technologies 4G LTE . OFDM scheme can be implemented using fast Fourier transforms (FFT), discrete cosine transform–based OFDM (DCT‐OFDM), and discrete wavelet transforms–based OFDM (DWT‐OFDM) are presented in various studies …”

Section: Introductionmentioning

confidence: 99%

“…3 This technology has been integrated into current wireless mobile communication equipment and devices such as high-performance local area networks (HIPERLAN), IEEE802.11a local area network (LAN), IEEE802.16, Wi-Max, digital audio broadcast (DAB), digital video broadcast (DVB), highdefinition television (HDTV), and next-generation mobile technologies 4G LTE. [4][5][6] OFDM scheme can be implemented using fast Fourier transforms (FFT), discrete cosine transform-based OFDM (DCT-OFDM), and discrete wavelet transforms-based OFDM (DWT-OFDM) are presented in various studies. [7][8][9][10][11] Rapid developments in the digital world necessitate the need to concentrate on information hiding technology.…”

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confidence: 99%

Secure image transmission through crypto‐OFDM system using Rubik's cube algorithm over an AWGN channel

Dharavathu

Mosa

2020

Int J Communication

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Summary Confidentiality of information must be maintained when it is required to be transmitted over a communication channel or when it is stored in a computer for further information access. Establishing a highly reliable and secure means of wireless communication for the transfer of digital data (text, images, audio, and video) from source to destination is becoming a prime requirement in present‐day wireless communications. Security can be achieved at the network level as well as at the data level. Data‐level security is made through cryptographic techniques. This paper emphasizes data‐level security aspects in a wireless communication system for the secure transmission of images over an AWGN channel condition. Here, a crypto orthogonal frequency division multiplexing system (crypto‐OFDM system) is designed using Rubik's cube encryption algorithm scheme for secured transmission of images under the MATLAB environment. The quality of the image transmission is analyzed using peak signal to noise ratio (PSNR) and BER at different SNR conditions. The quality of the encryption algorithm was also tested with statistical metrics, which are the histogram, NPCR, UACI, entropy, correlation coefficient analysis, etc. The numerical results reveal that a DCT‐based crypto‐OFDM system with Rubik's cube algorithm show a better performance over earlier cryptosystems and also perform superior to the original/basic OFDM system. The statistical analysis tests prove that Rubik's cube algorithm is one of the most robust algorithms for security point of view and is easy to implement, as Rubik's cube algorithm makes use of natural characteristics of pixel values, which form the basis for designing the secret key.

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“…It has been accepted in the IEEE802.11a local area network (LAN), IEEE802. 16 WiMax, digital audio broadcasting (DAB), and digital video broadcasting (DVB) and next generation mobile technologies 3GPP LTE [4]. To achieve higher spectral efficiency, OFDM is being considered as a crucial technique for indoor VLC systems.…”

Section: Introductionmentioning

confidence: 99%

A Chaos-Based Encryption Scheme for DCT Precoded OFDM-Based Visible Light Communication Systems

Wang

Chen

2016

Journal of Electrical and Computer Engineering

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This paper proposes a physical encryption scheme for discrete cosine transform (DCT) precoded OFDM-based visible light communication systems by employing chaos scrambling. In the proposed encryption scheme, the Logistic map is adopted for the chaos mapping. The chaos scrambling strategy can allocate the two scrambling sequences to the real (I) and imaginary (Q) parts of OFDM frames according to the initial condition, which enhance the confidentiality of the physical layer. The simulation experimental results prove the efficiency of the proposed encryption method for DCT precoded OFDM-based VLC systems. The experimental results show that the proposed security scheme can protect the DCT precoded OFDM-based VLC from eavesdropper, while keeping the advantage of the DCT precoding technique, which can reduce the PAPR and improve the BER performance of OFDM-based VLC.

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Design and Performance Evaluation of OFDM-Based Wireless Services Employing Radio over Optical Wireless Link

Abstract: ABSTRACT

Cited by 5 publications

References 14 publications

Amplitude and Phase Modulation for Ultrasonic Wireless Communication

Amplitude and Phase Modulation for Ultrasonic Wireless Communication

Secure image transmission through crypto‐OFDM system using Rubik's cube algorithm over an AWGN channel

A Chaos-Based Encryption Scheme for DCT Precoded OFDM-Based Visible Light Communication Systems

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