Performance evaluation of DVB-t image transmission over a MIMO OWC channel at 650 nm under varying turbulence regimes

et al. 2021

Self Cite

Summary In this article, an indoor environment of 5 × 5 × 3 m3 dimensions is considered and a total of nine LED lamps are installed at the ceiling in a symmetrical pattern. The inter‐spatial separation between LED lamps is varied to achieve the dual purpose of lighting and communication services. The multipath channel impulse response for distinct receiver locations is also calculated under line‐of‐sight (LOS) and non‐line‐of‐sight (NLOS) channel conditions. Several performance parameters, that is, illumination uniformity, received power fluctuations, root‐mean‐delay spread (RMDS), are evaluated to estimate the performance of the proposed system. The results show that spatial separation of 1.5 m between the LED lamps outperforms the other considered spatial separations, and the error‐free data transmission rate for the proposed system comes out to be about 40 Mbps across the entire receiver plane. Furthermore, an RGB image is transmitted at 40 Mbps and the received image quality is estimated in terms of image quality parameter, that is, structure similarity index (SSIM) over the receiver plane. The results outlined that the received image shows 100% similarity with the transmitted image, and thus, the proposed system can be effectively deployed in practical indoor environments.

SSIM ((), normalx, normaly) = \frac{((), 2 μ_{x} μ_{y} + C_{1}) ((), 2 s_{xy} + C_{2})}{((), {normalμ}_{normalx}^{2} + {normalμ}_{normaly}^{2} + C_{1}) ((), {normals}_{normalx}^{2} + {normals}_{normaly}^{2} + C_{2})}

Section: Numerical Results and Discussionmentioning

confidence: 99%

Quantitative analysis of different LED lamp configurations in indoor VLC system

Priyanka

et al. 2021

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“…where G T = (πD T /λ) 2 and G R = (πD R /λ) 2 , G T is the gain of transmit aperture, G R is the gain of receiver aperture, at a distance L of from transmitter, suffering an attenuation A.…”

Section: System Designmentioning

confidence: 99%

“…With the advent of smart devices, changes in user preferences and evolution of enabling technologies, the information, communication broadcast, and broadband services have converged into integrated service regimes. 1,2 IMT-2020, popularly known as 5G, has with its characteristic enhanced Mobile Broadband (eMBB), mass Machine Type Communication (mMTC) and Ultra Reliable and Low Latency Communication (URLLC) have made smart home, smart cities, automated industry, augmented reality and work & play in cloud, and so on, possible from print to practice. 3,4 Improvements in access network technologies have made ubiquitous and seamless delivery of data services a known reality.…”

Section: Introductionmentioning

confidence: 99%

“…The preceding decade was marked by onset of bandwidth intensive services such as immersive multimedia, machine to machine communication (M2M), machine to person (sensor networks), device to device (D2D), and fully automated and intelligent digital world. With the advent of smart devices, changes in user preferences and evolution of enabling technologies, the information, communication broadcast, and broadband services have converged into integrated service regimes 1,2 . IMT‐2020, popularly known as 5G, has with its characteristic enhanced Mobile Broadband (eMBB), mass Machine Type Communication (mMTC) and Ultra Reliable and Low Latency Communication (URLLC) have made smart home, smart cities, automated industry, augmented reality and work & play in cloud, and so on, possible from print to practice 3,4 .…”

Section: Introductionmentioning

confidence: 99%

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Quality assessment for terrestrial digital video broadcast over optical wireless communication‐passive optical network under moderately turbulent regime with spatial diversity

Gill

et al. 2022

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Summary The preceding decade has seen successful rollout of 5G and convergence of broadcast broadband and telecom sector. The near future bandwidth demands for services such as advanced immersive multimedia are even more challenging. This has led to advent of 6G. The access technologies need to provide virtually unlimited data rates to support majority of applications in 6G. The optical wireless communication (OWC) with its inherent advantages is a potential enabler in this scenario. However, phenomenon such as atmospheric turbulence poses a serious degradation to performance of such systems. For multimedia services, end user perception is the ultimate quality indicator. To ascertain this quality in quantitative terms, full reference quality metrics are employed for communication purposes. In this paper, digital video broadcasting terrestrial (DVB‐T) videos with varying complexities are transmitted over OWC‐passive optical network (PON) architecture. For performance enhancement 2 × 2 repetitive coding MIMO is employed with maximal ratio combining receiver. A total of 6 video quality assessment (VQA) metrics are evaluated for the system w.r.t channel parameter as Rytov variance. For all the VQA metrics, an enhancement in the performance is observed by using MIMO technique. This performance improvement is more prominent for more complex video as compared to less complex video. As for the limiting case BER of 10−3 gives a limiting link distance of 1350 m; however with VQA metrics, the limiting case distance is 1280 m. By the use of 2 × 2 MIMO techniques, this distance enhances by 20–25 m.

“…These quality metrics are important for data mining applications, machine learning, content based image retrieval, saliency and esthetic assessment, 19 image classification, unstructured to structural transformation and distortion analysis performance over communication channel. Gill and Singh 20 have shown the importance of IQA metrics for Quality of Experience (QoE) assessment and its interdependence upon quality of service (QoS) metrics for broadcast applications. In this paper, a total of eight IQA metrics are evaluated for an image being transmitted over varying strengths of turbulence in an OWC channel for different lengths of it.…”

Section: Introductionmentioning

confidence: 99%

Analysis of full reference quality metrics for image transmission over a MIMO OWC channel under varying turbulent conditions

Gill

et al. 2023

The integrated OWC-PON architecture has a potential to overcome the limitations of existent RF technology and eliminate the last mile bottleneck in geographically constrained access networks thus providing real sense broadband from core to user. However, phenomenon such as atmospheric turbulence causes performance degradation in such systems. In the dissemination of multimedia services, the performance is the ultimate quality as perceived by end user's visual senses. To ascertain this quality in quantitative terms, full reference quality metrics are employed for communication purposes. This paper deals with classification, evaluation and analysis of various image quality assessment metrics for image transmission over OWC channel under varying turbulent conditions. The performance enhancement in terms of these metrics is investigated by deploying MIMO diversity reception. Moreover, a prediction model for SSIM is developed and compared for both SISO and MIMO links. The results show an improvement in IQA metrics with diversity reception. SSIM can be predicted in terms of log of refractive index structure parameter by a fourth order polynomial model for both SISO and MIMO receptions under all regimes of turbulence. The goodness of the fit statistics is presented along with the models to provide for their accuracy and reliability.