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IEEE International Symposium on Geoscience and Remote Sensing (IGARSS)

作者： Jiahui Qu Qian Du Yunsong Li Wenqian Dong State Key Lab. of Integrated Service Networks Xidian University Xi’an China Department of Electrical and Computer Engineering Mississippi State University Starkville USA

In this paper, a new hyperspectral image (HSI) and panchromatic image (PANI) fusion approach via weighted tensor matrix is proposed. In the proposed method, homomorphic filtering is use for obtaining spatial component of HSI, and a weighted root mean squared error (RMSE)-based algorithm is proposed to extract the total intensity details of HSI. In addition, an optimized weighted tensor matrix-based method is proposed to acquire the integrated intensity details from both HSI and PANI. Comparative analyses show the proposed approach performs better than other excellent approaches in visual inspection and objective assessment.

关键词： Spatial resolution Hyperspectral imaging Information filters Bayes methods

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Performance enhancement in multihop wireless ad hoc networks

Performance enhancement in multihop wireless ad hoc networks

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IEEE Conference on Vehicular Technology (VTC)

作者： W. Liu Y. Fang Younggoo Kwon Wireless Networks Lab (WINET) Department of Electrical and Computer Engineering University of Florida Gainesville FL USA Samsung Electro Mechanics Inc. South Korea

Poor bandwidth utilization of multihop ad hoc networks is a critical bottleneck that needs to be overcome before many interesting applications can be launched. In this paper we first propose a unified differentiation MAC architecture to support prioritized service. Based on the architecture we further propose a performance enhancement scheme for multihop wireless ad hoc networks. Unlike other schemes that may introduce extra overhead or may be incompatible with IEEE 802.11, our enhancement modifies the original IEEE 802.11 MAC and maintains the compatibility. By defining the interframe space and the contention window size as functions of the number of retransmissions, our enhanced scheme is able to give high priority to nodes which have retried many times to access the medium. As a result, it improves the overall performance in terms of end-to-end delay, packet deliver ratio, decreases the packet-dropping rate, and reduces the unnecessary routing discovery and update.

关键词： Intelligent networks Spread spectrum communication Ad hoc networks Media Access Protocol Telecommunication traffic Wireless networks computer errors Bandwidth Road accidents Delay

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VirtualQueue: A technique for packet voice stream reconstruction

VirtualQueue: A technique for packet voice stream reconstruc...

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IEEE International Conference on Multimedia Computing and Systems (ICMCS)

作者： N. Figueira J. Pasquale Bay Architecture Lab Nortel Networks Limited Santa Clara CA USA Computer Systems Laboratory Department of Computer Science and Engineering University of California San Diego La Jolla CA USA

Statistical multiplexing in packet-switched networks creates problems for packetized voice streams by introducing variable delays on delivered packets. The resulting jitter needs to be filtered so that received voice packets can be reconstructed as a continuous stream at the receiver. One common approach to reconstruction is to play back the receiver voice data after a delay offset from the departure time at the source of the packet stream. While the added delay helps filter jitter, one cannot introduce too much delay, otherwise, interactiveness suffers. This paper presents a new technique to find the necessary delay offset (or play-back delay) to recreate the original voice data stream. This technique gives the user control over the fraction of packets that should arrive in time to be played back so that the added play-back delay can be effectively minimized.

关键词： Delay effects Delay estimation Added delay Jitter Upper bound Streaming media Humans Degradation NASA laboratories

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Optimal Detection for Diffusion-Based Communications in the Presence of ISI

Optimal Detection for Diffusion-Based Communications in the ...

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IEEE Global Communications Conference

作者： Ling-San Meng Ping-Cheng Yeh Kwang-Cheng Chen Ian F. Akyildiz Communications and Networks Science (CoWorkS) Lab Graduate Institute of Communication Engineering and Department of Electrical Engineering National Taiwan University Broadband Wireless Networking Laboratory School of Electrical and Computer Engineering Georgia Institute of Technology

ISBN: (纸本)9781467309202

Communications based on diffusion refers to the transfer of information using molecules as message carriers whose propagation is governed by the laws of Brownian motion. Molecular communication is considered to be one of the most promising approaches for the end-to-end communication between nanoscale devices. In this paper, both an optimal and a suboptimal receiver detection scheme are proposed for a diffusion-based binary digital communication system in the presence of ISI. The transmission of binary information is accomplished by using On-Off Keying (OOK) with only one molecule. The proposed system can serve as the theoretical basis for end-to-end communication in molecular nanonetworks where molecules of different types are used by different nanoscale devices. The effect of channel memory resulting from the residual molecule diffusion from previous transmissions is treated analytically in the formulation of the detection schemes. Numerical results show that the proposed detection schemes can maximize the mutual information over a practical range of the parameter of signaling interval without a priori information. A channel capacity of 1 bit per channel utilization during a signaling interval can be ultimately achieved by extending the duration of the signaling interval, even with infinite channel memory.

关键词： Molecular communication Diffusion process Brownian motion Neyman-Pearson criterion Mutual information Channel capacity Molecular communication Channel capacity Brownian motion Diffusion processes end-to-end Nanodevice Communication Research molecules COMMUNICATION SYSTEMS optimum detection on-off keying binary information Information Transfer

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An improved co-designed AES-ECC cryptosystem for secure data transmission

An improved co-designed AES-ECC cryptosystem for secure data...

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作者： Hafsa, Amal Sghaier, Anissa Zeghid, Medien Malek, Jihene Machhout, Mohsen Department of Physics Electronics and Micro-Electronics Laboratory LR99ES30 EµE Lab Faculty of Sciences Monastir University Monastir Tunisia Department of Computer Engineering and Networks College of Engineering at Wadi Addawasir Prince Sattam Bin Abdulaziz University Saudi Arabia Department of Electronics Sousse University Higher Institute of Applied Sciences and Technology LR99ES30 EµE Lab Sousse Tunisia

Asymmetric cryptography is inherently slow because of its associated complex computing, while symmetric cryptography is speedy. However, the latter is suffering from a serious gap which is secure key exchange. To deal with this problem, we suggest an efficient hybrid AES-ECC cryptosystem combining the benefits of the symmetric advanced encryption standard (AES) to speed-up data encryption and the asymmetric elliptic curve cryptography (ECC) to secure the symmetric key session interchange. The proposed hybrid AES-ECC cryptosystem uses a co-design approach and relies on AES-ECC optimisations. We fundamentally mix the matrix multiplication of the AES MixColumns with the S-box allowing for very fast software implementation (on NIOS-II processor). Then, we propose an optimised ECC hardware architecture based on López-Dahab scalar multiplication (on Cyclone IV.E). The implementation results of the proposed cryptosystem afford an interesting trade-off between area, speed, and power and can be used for information and computer security. Copyright © 2020 Inderscience Enterprises Ltd.

关键词： Storms

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Using Trust to Establish Cooperative Spectrum Sensing Framework

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Procedia engineering 2011年 15卷 1361-1365页

作者： Guanghua Zhang Renshuang Ding Lijing Huang Key Lab of Computer Networks and Information Security of Ministry of Education Xidian University Xi’an 710071 China College of Information Science and Engineering Hebei University of Science and Technology Shijiazhuang 050018 China

Cooperative spectrum sensing in cognitive radio networks need many users to carry out because sensing performace is influenced by the credibility of a single user. A trsut based cooperative spectrum sensing framework is put forward for establishing the trust value of each user in view of local sensing differences, sensing location factors, control channel conditions, which can accurately weigh a single user's information at the CR base station. Simulation results show that while applied to concrete models the proposed framework has lower missed detection probability under a certain false alarm probability.

关键词： Trust Spectrum sensing False alarm probability Missed detection probability

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On Scheduling of Data Dissemination in Vehicular networks with Mesh Backhaul

On Scheduling of Data Dissemination in Vehicular Networks wi...

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IEEE International Conference on Communications Workshops, ICC

作者： Z.-Y. Liu B. Liu T. Zhao W. Yan PKU School of Electronics Engineering and Computer Science Beijing China State Key Lab for Adv Opt Commun Syst & Networks Peking University Beijing China

Vehicular networks have become increasingly popular in the research community. Messages in vehicular networks are usually subject to both time and space constraints, and therefore should be disseminated during a specified duration and within a specific coverage. Since vehicles are constantly moving in and out of a region, dissemination of a message should be repeated to achieve reliability. However, the reliable dissemination for some messages might be at the cost of unreliable or even no chance of dissemination for other messages, which raises tradeoffs between reliability and fairness. In this paper, we study the scheduling of data dissemination in vehicular networks with mesh infrastructure. Performance metrics for reliability and fairness are proposed first. Our metric for reliability covers factors in both time and space dimensions and the metric for fairness incorporates fairness in both the network-wise sense and the mesh roadside unit-wise (MRU-wise) sense. Several scheduling algorithms are developed: one reliability-oriented algorithm, one fairness- oriented algorithm and three hybrid schemes. Extensive evaluation work is performed to quantitively analyze different scheduling algorithms. Our evaluation results show that (1) hybrid schemes outperform reliability-oriented and fairness-oriented algorithms in the sense of overall efficiency and (2) different algorithms have quite different characteristics on reliability and fairness.

关键词： Scheduling algorithm Vehicles Data engineering computer science Optimized production technology Time factors Costs Measurement Communications Society Conferences

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A Diffusion-Based Binary Digital Communication System

A Diffusion-Based Binary Digital Communication System

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IEEE International Conference on Communications

ISBN: (纸本)9781457720529

Diffusion-based communications refers to the transfer of information using particles as message carriers whose propagation is based on the law of particle diffusion. Though still at an early stage, there have been growing interests and research efforts dedicated to this communication technology. It has been identified that diffusion-based communications is one of the most promising approaches for end-to-end communication between nanoscale devices in the near future. In this paper, the design of a binary digital communication system is proposed based on particle diffusion. Stochastic signaling through On-Off Keying (OOK) for random particle emission and a diffusion channel with memory is considered. The diffusion is considered in the cases of one, two, and three dimensions. The receiver detection problem is formulated by using an information-theoretic approach. The optimal decision threshold for the receiver detection is derived through mutual information maximization for two cases, namely, when the a priori probability of bit transmission is fixed and known to the receiver and when this probability is unknown to the receiver. Numerical results indicate that in the case of diffusion in one or two dimensions, the information of a priori probability plays a key role in optimizing the system performance, while it does not when considering the diffusion in three dimensions.

关键词： Digital communications Diffusion process On-off keying Neyman-Pearson criterion Mutual information Channel capacity particle diffusion Digital communication systems COMMUNICATION SYSTEMS diffusion Receivers Communication technology System performance end-to-end on-off keying particle emission Nanodevice Information Transfer Binary

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Nanorobot-Based Intelligent Symptoms Analysis and Recommendation Framework in Edge networks

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IEEE Journal of Biomedical and Health Informatics 2023年 PP卷 1-8页

作者： Nandy, Sudarshan Hazra, Abhishek Adhikari, Mainak Puthal, Deepak School of Computer Science and Engineering SCOPE VIT University Vellore Tamil Nadu India Communications & Networks Lab National University of Singapore Singapore Department of Computer Science IIIT Lucknow Lucknow India Department of EECS Khalifa University UAE

Nanorobots are microscopic robots that operate at the molecular and cellular level and can potentially revolutionize fields such as medicine, manufacturing, and environmental monitoring due to their precision. However, the challenge for researchers is to analyze the data and provide a constructive recommendation framework instantly, as most nanorobots demand on-time and near-edge processing. To tackle this challenge, this research presents a novel edge-enabled intelligent data analytics framework called Transfer Learning Population Neural Network (TLPNN) to predict glucose levels and associated symptoms from invasive and non-invasive wearable devices. The TLPNN is designed to be unbiased in predicting symptoms during the initial phase but later modified based on the best-performing neural networks during the learning phase. The effectiveness of the proposed method is validated using two publicly available glucose datasets with various performance metrics. The simulation results demonstrate the effectiveness of the proposed TLPNN method over existing ones. IEEE

关键词： Neural networks

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The multi-objective optimization of beam pattern in the nonuniform array antenna using the evolutionary algorithm

The multi-objective optimization of beam pattern in the nonu...

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IEEE Conference on Vehicular Technology (VTC)

作者： Jaehyun Park Joohwan Chun Dongkyun Nam Cheol Hoon Park Scientific Computing Lab Department of Electrical Engineering and Computer Science Korea Advanced Institute of Science and Technology Daejeon South Korea Neural Networks and Machine Intelligence Lab Department of Electrical Engineering and Computer Science Korea Advanced Institute of Science and Technology Daejeon South Korea

ISBN: (纸本)0780385217

This paper is about the optimization of beamforming weights in the nonlinear array antenna system. We consider the multi-objective optimization using the evolutionary algorithm. First, we constrain two variables - the width of the main-lobe, the level of the side-lobe. Second, we constrain an additional variable, the energy of beamforming weights, on the former system. In each case, we compute the costs of beamforming weights in each generation. At the end of generations, we can get the Pareto frontier which means the optimal solution set. To demonstrate the performance of the proposed optimization, we compare the results between the proposed algorithm and the conventional window method.

关键词： Antenna arrays Evolutionary computation Array signal processing Linear antenna arrays Phased arrays Optimization methods Antennas and propagation Paper technology Telephony Electronic mail

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