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IEEE (first ITW conference of the year) Information Theory Workshop (ITW)

作者： Olav Tirkkonen Robert Calderbank Department of Communications and Networking Aalto University Finland Department of Electrical and Computer Engineering Duke University Durham North Carolina USA

Motivated by problems in machine-type wireless communications, we consider codebooks of complex Grassmannian lines in N = 2 m dimensions. Binary Chirp (BC) codebooks of prior art are expanded to codebooks of Binary Subspace Chirps (BSSCs), where there is a binary chirp in a subset of the dimensions, while in the remaining dimensions there is a zero. BSSC codebooks have the same minimum distance as BC codebooks, while the cardinality is asymptotically 2.38 times larger. We discuss how BC codebooks can be understood in terms of a subset of the binary symplectic group Sp(2m, 2) in 2m dimensions; Sp(2m, 2) is isomorphic to a quotient group of the Clifford group acting on the codewords in N dimensions. The Bruhat decomposition of Sp(2m, 2) can be described in terms of binary subspaces in m dimensions, with ranks ranging from r = 0 to r = m. We provide a unique parameterization of the decomposition. The BCs arise directly from the full-rank part of the decomposition, while BSSCs are a group code arising from the action of the full group with generic r. The rank of the binary subspace is directly related to the number of zeros (sparsity) in the BSSC. We develop a reconstruction algorithm that finds the correct codeword with O(N log 2 N) complexity, and present performance results in an additive white Gaussian noise scenario.

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Federated knowledge distillation

arXiv

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arXiv 2020年

作者： Seo, Hyowoon Park, Jihong Oh, Seungeun Bennis, Mehdi Kim, Seong-Lyun Department of Electrical and Computer Engineering Seoul National University Centre for Wireless Communications University of Oulu Oulu90014 Finland School of Information Technology Deakin University GeelongVIC3220 Australia School of Electrical & Electronic Engineering Yonsei University 50 Yonsei-Ro Seodaemun-Gu Seoul03722 Korea Republic of Centre for Wireless Communications University of Oulu Oulu90014 Finland

Machine learning is one of the key building blocks in 5G and beyond [1, 2, 3] spanning a broad range of applications and use cases. In the context of mission-critical applications [2, 4], machine learning models should be trained with fresh data samples that are generated by and dispersed across edge devices (e.g., phones, cars, access points, etc.). Collecting these raw data incurs significant communication overhead, which may violate data privacy. In this regard, federated learning (FL) [5, 6, 7, 8] is a promising communication-efficient and privacy-preserving solution that periodically exchanges local model parameters, without sharing raw data. However, exchanging model parameters is extremely costly under modern deep neural network (NN) architectures that often have a huge number of model parameters. For instance, MobileBERT is a state-of-the-art NN architecture for on-device natural language processing (NLP) tasks, with 25 million parameters corresponding to 96 MB [9]. Training such a model by exchanging the 96 MB payload per communication round is challenging particularly under limited wireless resources. The aforementioned limitation of FL has motivated to the development of federated distillation (FD) [10] based on exchanging only the local model outputs whose dimensions are commonly much smaller than the model sizes (e.g., 10 labels in the MNIST dataset). To illustrate, as shown in Figure 1.1, consider a 2-label classification example wherein each worker in FD runs local iterations with samples having either blue or yellow ground-truth label. For each training sample, the worker generates its prediction output distribution, termed a local logit that is a softmax output vector of the last NN layer activations (e.g., {blue, yellow} = {0.7, 0.3} for a blue sample). At a regular interval, the generated local logits of the worker are averaged per ground-truth label, and uploaded to a parameter server for aggregating and globally averaging the local average logit

关键词： Distillation

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Traffic Modelling of Low Dense Femtocellular Network for Long Term Evolution

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Journal of computer and communications 2019年第12期7卷 88-101页

作者： Jesmin Akhter Abu Sayed Md. Mostafizur Rahaman Md. Imdadul Islam M. R. Amin Institute of Information Technology Jahangirnagar University Dhaka Bangladesh Department of Computer Science and Engineering Jahangirnagar University Dhaka Bangladesh Department of Electronics and Communications Engineering East West University Dhaka Bangladesh.

One of the features of Long Term Evolution (LTE) is the deployment of femtocells as the underlain cell of a macrocell without any intervention of frequency planning to offload the traffic. In this paper we used Markov chain to derive the expression of blocking probability for both macro and femtocell in terms of traffic parameters of the network. We developed an analytical model to find the expression of probability of forced termination (FT) using combination of mobility model and probability tree considering low dense femtocellular network. Two different trees were designed: a newly originating call which starts its session in a femtocell and that of in a macro cell. The link parameters of small scale fading of wireless network under Multiple Input Multiple Output (MIMO) are combined with the proposed traffic model to get the probability of FT of a real-life network. A new state transition chain was also developed including its solution for LTE traffic of variable bandwidth (BW) and a comparison was made with Erlang’s traffic model.

关键词： Rayleigh and Nakagami-m Fading MIMO RB Forced Termination Outage Probability

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Water Consumption Monitoring with Fixture Recognition Using Random Forest

Water Consumption Monitoring with Fixture Recognition Using ...

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2018 IEEE Region 10 Conference, TENCON 2018

作者： Somontina, James Adrian B. Carlo Garcia, Felan C. Macabebe, Erees Queen B. Department of Electronics Computer and Communications Engineering Ateneo de Manila University Quezon City Philippines

ISBN: (纸本)9781538654576

Water is a limited resource that is essential for sustaining life but is often wasted. By monitoring water consumption in real time, users become aware of the amount of water that they utilize. This contribution presents a water monitoring system that determines the volume of water consumed for the following events: use of faucets, toilet flush, and shower. The system utilized a non-intrusive, single point sensing technique. The sensor was interfaced to a microcontroller to monitor fluid dynamics in real-time. Data was collected and processed by a microcomputer that uploads to a graphics user interface for easy viewing and online access. Random forest was used so that the system can identify and determine how much water each faucet or fixture uses. The volume of water used for every event was determined with 92.91 % accuracy and the fixture recognition algorithm resulted in 63% precision. © 2018 IEEE.

关键词： Fixtures (tooling)

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Decentralized joint precoding with pilot-aided beamformer estimation

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IEEE Transactions on Signal Processing 2018年第9期66卷 2330-2341页

作者： Kaleva, Jarkko Tolli, Antti Juntti, Markku Berry, Randall A. Honig, Michael L. Centre for Wireless Communications University of Oulu Oulu90014 Finland Department of Electrical Engineering and Computer Science Northwestern University EvanstonIL60208 United States

Downlink beamforming techniques with low beamformer training overhead are proposed for joint processing (JP) coordinated multipoint transmission (CoMP). The objective is to maximize the weighted sum rate within joint transmission clusters without centralized beamformer processing, while accounting for uncertainty in the underlying channels. The proposed methods use time-division duplexing and pilot-based training with, possibly, nonorthogonal pilot sequences. The beamformer training is done without the explicit channel state information estimation, which greatly improves the robustness to pilot contamination. Best response and gradient-based decentralized algorithms are proposed and provide a tradeoff between computational complexity and fast convergence rate. The impact of feedback/backhaul quantization is also considered. The results show that JP CoMP is feasible with slow fading conditions and limited backhaul capacity by employing decentralized beamformer processing. © 1991-2012 IEEE.

关键词： Beamforming

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Design and development of a novel acoustic rain sensor with automated telemetry 3

Design and development of a novel acoustic rain sensor with ...

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3rd International Conference on Inventions, ICI 2017

作者： Guico, Maria Leonora Abrajano, Gemalyn Domer, Prince Aldrin Talusan, Jose Paulo Department of Electronics Communications and Computer Engineering Ateneo de Manila University Quezon City Philippines

This paper presents the recent results of the design of a novel acoustic rainfall sensing system that is low-cost, portable, and easily deployable, which makes use of the recorded sound produced by the impact of the raindrops on the sensor surface. The sensor design allows the gathering of acoustic signal power and sending it to a server after a specified time interval, either through SMS or mobile internet connection. It exists in a weather-proof, standard-conformant, standalone system with its own power supply and telemetric capabilities. These acoustic point sensors can gather rainfall data at high spatial and temporal resolutions. Such deployments can show the variations of rainfall intensities in sub-kilometer areas, particularly in the tropical regions. Since it is low-cost, it can also improve the density of rainfall measuring devices in an area. Moreover, the reliability is improved by providing near-real time data, as opposed to tipping buckets with manual data retrieval. The prototype sensor system was placed next to standard rain measuring devices and observed during the rainy season. The paper will discuss the design and deployment of the system, as well as initial results of data analysis and comparison with standard rain measuring devices. © The Authors, published by EDP Sciences, 2018.

关键词： Rain

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Using light sensing to acquire SpO2 biological information via a non-contact approach 4th

Using light sensing to acquire SpO2 biological information v...

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4th iCatse Conference on Mobile and Wireless Technology, ICMWT 2017

作者： Nagao, Yoshimitsu Hatsuda, Mizuho Liu, Jiang Shimamoto, Shigeru Department of Computer Science and Communications Engineering Graduate School of Fundamental Science and Engineering WASEDA University Tokyo Japan

ISBN: (纸本)9789811052804

Using conventional approaches to estimating arterial oxygen saturation (i.e., SpO2) for individuals, it was impossible to measure unless the given sensor of the pulse oximeter was attached to the finger. In this study, we attempted to realize successful SpO2 measurements using non-contact space measurements and succeeded in our experiments. Our work can be used for medical care, elder care, and other related fields. Finally, even though we observed some problems in that our approach was susceptible to other light interference, we offer our work as a first method using the laser wavelength for these purposes. © Springer Science+Business Media Singapore 2018.

关键词： Oxygen

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Successive cancellation decoding of single parity-check product codes: Analysis and improved decoding

arXiv

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arXiv 2020年

作者： Coşkun, Mustafa Cemil Liva, Gianluigi Amat, Alexandre Graell Lentmaier, Michael Pfister, Henry D. Munich Germany Weßling Germany Institute of Communications and Navigation of the DLR Weßling Germany Department of Signals and Systems Chalmers University of Technology Gothenburg Sweden Department of Electrical and Information Technology Lund University Lund Sweden Department of Electrical and Computer Engineering Duke University Durham United States

—A product code with single parity-check component codes can be described via the tools of a multi-kernel polar code, where the rows of the generator matrix are chosen according to the constraints imposed by the product code construction. Following this observation, successive cancellation decoding of such codes is introduced. In particular, the error probability of single parity-check product codes over binary memoryless symmetric channels under successive cancellation decoding is characterized. A bridge with the analysis of product codes introduced by Elias is also established for the binary erasure channel. Successive cancellation list decoding of single parity-check product codes is then described. For the provided example, simulations over the binary input additive white Gaussian channel show that successive cancellation list decoding outperforms belief propagation decoding applied to the code graph. Finally, the performance of the concatenation of a product code with a high-rate outer code is investigated via distance spectrum analysis. Examples of concatenations performing within 0.7 dB from the random coding union bound are provided. Copyright © 2020, The Authors. All rights reserved.

关键词： Decoding

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Monitoring semantic relatedness and revealing fairness and biases through trend tests

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International Journal of Information Management Data Insights 2025年第1期5卷

作者： Bourguet, Jean-Rémi Sow, Adama Departmento de Ciência da Computação Universidade Vila Velha (UVV) Avenida Comissário José Dantas de Melo 21 - Boa Vista II Vila Velha CEP 29102-920 Brazil Dipartimento di Scienze Politiche Scienze della Comunicazione ed Ingegneria dell'Informazione Università degli Studi di Sassari (UNISS) Viale Mancini 5 Sassari 07100 Italy Département Génie Informatique et Télécommunications Ecole Polytechnique de Thiès (EPT) Route Base aérienne Diakhao Dakar-Fann BP 64551 Senegal Department of Computer Science and Software Engineering Université de Laval 1065 avenue de la Médecine Quebec G1K 7P4 Canada

An emerging application domain concerning content-based recommender systems provides a better consideration of the semantics behind textual descriptions. Traditional approaches often miss relevant information due to their sole focus on syntax. However, the Semantic Web community has enriched resources with cultural and linguistic background knowledge, offering new standards for word categorization. This paper proposes a framework that combines the information extractor ReVerb with the WordNet taxonomy to monitor global semantic relatedness scores. Additionally, an experimental validation confronts human-based semantic relatedness scores with theoretical ones, employing Mann–Kendall trend tests to reveal fairness and biases. Overall, our framework introduces a novel approach to semantic relatedness monitoring by providing valuable insights into fairness and biases. © 2024 The Authors

关键词： Biases Fairness ReVerb Semantic relatedness Visualization WordNet

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Energy aware mobile cloud computing algorithm for android smartphones 3rd

Energy aware mobile cloud computing algorithm for android sm...

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3rd International Conference on Advanced Intelligent Systems and Informatics, AISI 2017

作者： Said, Samar A. Salem, Sameh A. Sayed, Samir G. Department of Electronics Communications and Computer Engineering Faculty of Engineering Helwan University Cairo Egypt London United Kingdom

ISBN: (纸本)9783319648606

Nowadays, smartphones and tablet computers have become progressively essential parts of our life. However, these devices are limited in their computational resources compared to other processing devices such as personal computers and laptops. To mitigate this problem, cloud computing can be a promising candidate to help resource-constrained devices by offloading the heavy applications onto the Cloud. In this paper, a novel energy aware mobile cloud computing algorithm is proposed. The proposed algorithm estimates the application computational time and uses weighted parameters to obtain a reliable offloading decision. This actually saves the energy and reduces applications’ execution time. Experimental results on different applications show that the proposed algorithm improves applications’ performance and effectively reduces the energy consumption through a robust estimation of applications’ execution time. © 2018, Springer International Publishing AG.

关键词： Energy conservation

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