Journal of Optical Communications最新文献_第4页

Performance analysis and comparison of NRZ-DQPSK optical wireless system with different filters under different weather conditions 不同天气条件下使用不同滤波器的 NRZ-DQPSK 光无线系统的性能分析与比较

Journal of Optical Communications Pub Date : 2023-12-14 DOI: 10.1515/joc-2023-0279

Monika Mehra, Satish Saini, Ravi Kumar

引用次数: 0

Enhancing high-speed networks using RGB-based WLAN through Ro-FSO integration in the 5 GHz band 在 5 GHz 频段通过 Ro-FSO 集成，利用基于 RGB 的 WLAN 增强高速网络

Journal of Optical Communications Pub Date : 2023-12-12 DOI: 10.1515/joc-2023-0348

Abhishek Sharma, Vivekanand Mishra

{"title":"Enhancing high-speed networks using RGB-based WLAN through Ro-FSO integration in the 5 GHz band","authors":"Abhishek Sharma, Vivekanand Mishra","doi":"10.1515/joc-2023-0348","DOIUrl":"https://doi.org/10.1515/joc-2023-0348","url":null,"abstract":"Abstract The limited bandwidth constraints imposed by conventional wireless carriers pose a significant hurdle when it comes to the delivery of high-speed broadband services. In response to this challenge, Radio over Free Space Optics (Ro-FSO) has emerged as a viable and innovative solution, seamlessly amalgamating wireless and optical systems. This integration proves particularly invaluable in sensitive environments, such as hospitals, where the risk of electromagnetic interference disrupting critical medical equipment is a real concern. Ro-FSO offers a disruption-free avenue for high-speed data transmission, positioning it as the ideal choice for broadband services, including Wireless Local Area Networks (WLANs). Within the scope of this study, we introduce a high-speed Ro-FSO link, showcasing the capability to concurrently transmit three independent channels with Red, Green and Blue (RGB) laser respectively, each supporting a robust 1 Gbps data rate. These data streams are skilfully up-converted to the 5 GHz RF bands, encompassing transmission distances of 650 m across the FSO channel. Our numerical simulation findings underscore the successful transmission of all the channels using wavelength division multiplexing (WDM), seamlessly meeting the prescribed Bit Error Rate (BER) and eye pattern criteria, solidifying the Ro-FSO’s standing as a promising solution for high-speed broadband delivery.","PeriodicalId":16675,"journal":{"name":"Journal of Optical Communications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138633164","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Traffic grooming with greedy-based priority routing and wavelength assignment for passive optical networks 为无源光网络提供基于贪婪优先级路由和波长分配的流量疏导功能

Journal of Optical Communications Pub Date : 2023-12-08 DOI: 10.1515/joc-2023-0323

Ashok Kumar, Shiveta Bhat, Sonam Aggarwal, Sunil Semwal, Jyoti Batra

{"title":"Traffic grooming with greedy-based priority routing and wavelength assignment for passive optical networks","authors":"Ashok Kumar, Shiveta Bhat, Sonam Aggarwal, Sunil Semwal, Jyoti Batra","doi":"10.1515/joc-2023-0323","DOIUrl":"https://doi.org/10.1515/joc-2023-0323","url":null,"abstract":"Abstract Today, in passive optical networks (PON) the major issue is call blocking and it is getting worse as there is an increase in the number of connection requests but the wavelength channels in fiber links are limited. In this research, greedy-based priority routing and wavelength assignment traffic grooming (GPRWATG) technique is proposed aimed at reducing call blockage. In this scheme, to avoid optical–electrical–optical correspondence, firstly the grooming of connection requests with same source destination (s–d) is performed. According to the priority of these groomed connection requests, wavelength assignment and routing is assigned. This approach not only addresses the call blocking issue but also aligns with industry demands for improved network infrastructure. The proposed work performance is analyzed for blocking probability (BP), congestion, and its performance is compared with the non-priority-based routing and wavelength assignment traffic grooming (NPRWATG) and priority-based routing and wavelength assignment traffic grooming (PRWATG) schemes. The proposed method has 23.6 % lower congestion as compared to PRWATG and 21 % lower congestion as compared to NPRWATG. Also, the BP of GPRWATG is 26 % less than PRWATG and 21 % less than NPRWATG. Thus, it can be analyzed that by using the proposed technique, the BP as well as the congestion of the network altogether is reduced in comparison to the existing state-of-art techniques.","PeriodicalId":16675,"journal":{"name":"Journal of Optical Communications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138588375","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A hybrid FSO/RF communication system with DSP for long haul communication 用于长距离通信的带 DSP 的 FSO/RF 混合通信系统

Journal of Optical Communications Pub Date : 2023-12-08 DOI: 10.1515/joc-2023-0242

Shakshi Ghatwal, Himanshi Saini

{"title":"A hybrid FSO/RF communication system with DSP for long haul communication","authors":"Shakshi Ghatwal, Himanshi Saini","doi":"10.1515/joc-2023-0242","DOIUrl":"https://doi.org/10.1515/joc-2023-0242","url":null,"abstract":"Abstract Due to the exceptional growth in mobile data traffic, emerging mobile access networks need a lot of bandwidth and robust network architecture as a crucial solution in delivering a high capacity for support in the future. The proposed work presents a detailed investigation of hybrid free space optical/radio frequency (FSO/RF) communication system at 320 Gbps channel capacity. A digital signal processing (DSP) compensation mechanism is used in the receiver system along with circular polarization division multiplexed (CPDM) 256-quadrature amplitude modulation (QAM) to improve system performance. Constellation diagrams have been used to measure the effectiveness of the system. The constellation diagrams which are considered for investigating the proposal are, (a) without DSP (digital signal processing), (b) with DSP without normalization and low pass filtering, (c) with DSP without carrier phase estimation (CPE) and frequency offset estimation (FOE) and (d) with DSP using normalization, low pass filtering, CPE and FOE, in FSO/RF system under clear weather, rain and haze. Effects of presence and absence of DSP in the coherent receiver have been investigated. Results show the improvement in system performance with least error vector magnitude (EVM), when DSP incorporated FSO/RF system is implemented using normalization, low pass filtering, CPE, FOE with perfect placements of symbols.","PeriodicalId":16675,"journal":{"name":"Journal of Optical Communications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138589558","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A neural networks approach for designing compact all-optical photonic crystal based AND logic gate 设计基于全光学光子晶体的紧凑型 AND 逻辑门的神经网络方法

Journal of Optical Communications Pub Date : 2023-12-06 DOI: 10.1515/joc-2023-0328

Faribrz Parandin, Salah I. Yahya, Mehdi Rezaeenia, Asghar Askarian, S. Roshani, S. Roshani, Y. Ghadi, M. Jamshidi, Sahar Rezaee

{"title":"A neural networks approach for designing compact all-optical photonic crystal based AND logic gate","authors":"Faribrz Parandin, Salah I. Yahya, Mehdi Rezaeenia, Asghar Askarian, S. Roshani, S. Roshani, Y. Ghadi, M. Jamshidi, Sahar Rezaee","doi":"10.1515/joc-2023-0328","DOIUrl":"https://doi.org/10.1515/joc-2023-0328","url":null,"abstract":"Abstract This paper introduces a new method for creating an all-optical AND gate by utilizing a two-dimensional photonic crystal configuration for the first time. This gate design is intended for applications in optical computing and all-optical logic, offering the potential for rapid computation and parallel processing. The described gate is characterized by its compact dimensions and comprises two inputs and a single output. The high and low logic states are defined based on power values, where logic 0 corresponds to low power and logic 1 corresponds to high power emitted from the light source. To enhance the design process, artificial neural networks (ANNs) are utilized. ANNs offer a powerful tool for optimizing and fine-tuning the photonic crystal structure parameters to achieve the desired logic functionality. With the help of the applied ANNs, the design process is eased and high performance is achieved for the proposed photonic crystal structure. By integrating ANNs into the design process, this research opens up new possibilities for advancing the field of photonic logic circuits. Combining photonic crystals and ANN optimization provides a powerful approach to designing complex and efficient optical computing systems. The results show that the obtained power values are high for 1 logic state and low for the 0 logic state, which verifies the AND gate accuracy table. The achieved accurate results verify the validity of the proposed approach for achieving precise and reliable all-optical logic operations.","PeriodicalId":16675,"journal":{"name":"Journal of Optical Communications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138595851","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

BER performance analysis of MWIR and SWIR FSO links utilizing aperture averaging technique considering turbulence and various visibility situations with pointing errors 考虑到湍流和各种可见度情况以及指向误差，利用孔径平均技术对中波红外（MWIR）和全波红外（SWIR）FSO 链路进行误码率性能分析

Journal of Optical Communications Pub Date : 2023-12-06 DOI: 10.1515/joc-2023-0264

Shibabrata Mukherjee, Sujoy Paul, S. Mazumdar

{"title":"BER performance analysis of MWIR and SWIR FSO links utilizing aperture averaging technique considering turbulence and various visibility situations with pointing errors","authors":"Shibabrata Mukherjee, Sujoy Paul, S. Mazumdar","doi":"10.1515/joc-2023-0264","DOIUrl":"https://doi.org/10.1515/joc-2023-0264","url":null,"abstract":"Abstract The atmospheric turbulence and various weather situations deteriorate the system performance of free space optical (FSO) communication. In this article, the ‘bit error rate’ (BER) performance of the ‘mid wavelength infrared’ (MWIR) and ‘short wavelength infrared’ (SWIR) FSO link has been evaluated utilizing the aperture averaging approach with pointing errors in the presence of turbulence and different visibility scenario like fog, haze, clear weather, etc. The transmitter and receiver are 6 km apart, the modulation method is on off keying (OOK), and several aperture sizes at the receiver side have been taken into consideration for the aperture averaging approaches, such as 100 mm, 150 mm, and 200 mm. Additionally, for analysis of the pointing error of both the wavelengths of the FSO link, different beam divergence angle of the transmitter (laser) has been considered. The BER performance is improved with optimum beam divergence angles. The optimization of the divergence angle is independent of wavelengths and visibility conditions. However, the BER has increased more below the optimized divergence angle compared to a larger angle. The MWIR link performs well in poor visibility conditions like fog, whereas the SWIR link fails for the same link distance in both conditions with and without pointing errors.","PeriodicalId":16675,"journal":{"name":"Journal of Optical Communications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138597262","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hybrid RoF-RoFSO system for broadband services by incorporating polarization division multiplexing scheme 采用偏振分复用方案的宽带服务混合 RoF-RoFSO 系统

Journal of Optical Communications Pub Date : 2023-12-05 DOI: 10.1515/joc-2023-0309

Abhishek Sharma, Vivekanand Mishra, Kuldeep Singh, J. Malhotra

引用次数: 0

Mitigating network adaptation and QoT prediction challenges in WDM networks 缓解波分复用网络中的网络适应性和 QoT 预测挑战

Journal of Optical Communications Pub Date : 2023-11-28 DOI: 10.1515/joc-2023-0324

Amit Kumar Garg, Saloni Rai

{"title":"Mitigating network adaptation and QoT prediction challenges in WDM networks","authors":"Amit Kumar Garg, Saloni Rai","doi":"10.1515/joc-2023-0324","DOIUrl":"https://doi.org/10.1515/joc-2023-0324","url":null,"abstract":"Abstract The capacity and efficiency of optical communication networks have been completely transformed by wavelength division multiplexing (WDM) technology, which allows many wavelengths to be transmitted simultaneously over a single optical fibre. Conventional QoT prediction is based on analytical models that consider physical layer characteristics including dispersion, optical power and signal-to-noise ratio. But these models frequently oversimplify complex real-world situations, which reduces their accuracy for modern high-speed WDM networks. A data-driven solution is provided by machine learning(ML), which may boost the accuracy of QoT predictions by utilising real-time measurements, historical data and a variety of network situations. The creation of a ML-based framework for QoT prediction is investigated in the current research. This research proposes an effective ML-based routing computation model that uses a non-linear autoregressive recurrent neural network (ML-RCNA-RNN) to ensure QoT for every wavelength channel in high-capacity and high-speed WDM networks. Through simulations, more accurate QoT metrics, such as bit error rate (BER) 68.42 %, QoT prediction accuracy (Q-Factor) 5.9 %, network adaption time (ms) 48.3 %, latency (ms) 0.28 % and throughput (Gbps) 14.29 %, have been obtained compared to conventional QoT predictions. These results were obtained using Gaussian noise Python simulation (GNPy). As a result, the proposed framework that makes use of GNPy demonstrates that it substantially enhances optical communication networks’ performance and dependability. This facilitates the development of high-capacity, low-latency and reliable communication infrastructure, and makes it more adaptable and able to manage the complexity of high-speed WDM optical networks while preserving signal quality in the modern digital era.","PeriodicalId":16675,"journal":{"name":"Journal of Optical Communications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139227635","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Performance analysis of the RoFSO system over a log-normal turbulent link 对数正态湍流链路上的 RoFSO 系统性能分析

Journal of Optical Communications Pub Date : 2023-11-28 DOI: 10.1515/joc-2023-0310

Tahani J. Mohammed, M. Ali

{"title":"Performance analysis of the RoFSO system over a log-normal turbulent link","authors":"Tahani J. Mohammed, M. Ali","doi":"10.1515/joc-2023-0310","DOIUrl":"https://doi.org/10.1515/joc-2023-0310","url":null,"abstract":"Abstract This study provides a comprehensive analysis of the design and performance evaluation of a radio over free space transmission link using Optisystem v.20 software. The research focuses on the integration of four transmission channels through the use of a multiplexer to achieve a transfer rate of 40 Gbps over a distance of 2 km, with each channel carrying 10 Gbps of data. This is achieved by modulating data on 20 GHz radio frequency signals, which are subsequently transmitted via laser waves at different frequencies. The performance of the proposed communication is assessed by evaluating its behavior in the presence of different levels of atmospheric turbulence, classified as light, medium, and strong. This analysis involves calculating based on metrics such as the Q-factor, bit error rate (BER), and log values (BER). The results showed that the Q factor decreased by (4.7) under the influence of a strong disturbance, while in contrast, it decreased by (0.2) under the influence of a weak disturbance. The results also indicated a minimum log BER (at −7.96) for the wavelength (193.3 THz) at 1.5 km. Besides, the best frequency for data transfer was (193.1 THz), followed by (193.4 THz).","PeriodicalId":16675,"journal":{"name":"Journal of Optical Communications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139224822","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analysis of 256-QAM optical OFDM-NOMA signal detection using beam forming 利用波束形成的 256-QAM 光 OFDM-NOMA 信号检测分析

Journal of Optical Communications Pub Date : 2023-11-24 DOI: 10.1515/joc-2023-0292

Aziz Nanthaamornphong, Madhavi Mallam, Raminder Kaur

{"title":"Analysis of 256-QAM optical OFDM-NOMA signal detection using beam forming","authors":"Aziz Nanthaamornphong, Madhavi Mallam, Raminder Kaur","doi":"10.1515/joc-2023-0292","DOIUrl":"https://doi.org/10.1515/joc-2023-0292","url":null,"abstract":"Abstract The incessant growth of data demand in modern communication systems has spurred the quest for innovative technologies capable of delivering higher data rates, improved spectral efficiency, and enhanced quality of service. This research focuses on the synergistic integration of three cutting-edge technologies: 256-QAM (quadrature amplitude modulation), NOMA (non-orthogonal multiple access), and hybrid beamforming within the optical OFDM (orthogonal frequency division multiplexing) framework. The aim is to investigate their combined potential for revolutionizing optical communication networks and meeting the escalating demands of 5G and beyond. The methodology employed in this research entails extensive simulations and analytical assessments to gauge the performance of the proposed system under diverse channel conditions and operational scenarios. Metrics such as bit error rate (BER), spectral efficiency, and capacity are scrutinized to provide insights into the system’s efficiency and scalability. The amalgamation of 256-QAM, NOMA, and hybrid beamforming is expected to yield exponential gains in spectral efficiency, thereby optimizing the utilization of precious spectral resources. Reduced latency is pivotal for an array of real-time applications such as autonomous vehicles and augmented reality. This research aims to minimize latency, ensuring timely and responsive data transmission.","PeriodicalId":16675,"journal":{"name":"Journal of Optical Communications","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139241615","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0