Pub Date : 2022-06-08DOI: 10.1109/mocast54814.2022.9837600
A. Annovi, A. Cerri, P. Corona, F. Crescioli, David Martin, Eric Pierre, S. Dittmeier, G. Föhner, D. Gottschalk, André Schöning, L. Frontini, V. Liberali, A. Stabile, K. Kordas, T. Lari, Matteo Monti, E. Motuk, M. Warren, A. Vgenopoulos
The Associative Memory (AM) ASIC reached its version 8 in 2020 when it was submitted for fabrication. The AM08 has all the functionalities of the final chip, AM09, which was planned for the ATLAS experiment’s Hardware Track Trigger (HTT) system, at the High-Luminosity Large Hadron Collider (HL-LHC) at CERN. It is made in a 28nm CMOS technology with 10 metal layers and comes in a 15 × 15 FCBGA package. Being a digital chip with a full-custom CAM cell design that can store 12,000 patterns (16 bit × 8 words per pattern), and can achieve 6.25 x 1012 comparisons per second. The design and architecture of the chip is presented in this paper. Additionally we discuss the behavioral simulations that run and also the generation of the test vectors purposed for industrial and in-house testing, in VCD and STIL file formats. The laboratory test-benches both for the bare-die chips and the packaged ones are also presented, including the related test-boards. Finally, we discuss the preliminary power measurements and compare these with the post-layout simulations.
{"title":"The AM08 Associative Memory ASIC Design, Architecture and Evaluation methodology","authors":"A. Annovi, A. Cerri, P. Corona, F. Crescioli, David Martin, Eric Pierre, S. Dittmeier, G. Föhner, D. Gottschalk, André Schöning, L. Frontini, V. Liberali, A. Stabile, K. Kordas, T. Lari, Matteo Monti, E. Motuk, M. Warren, A. Vgenopoulos","doi":"10.1109/mocast54814.2022.9837600","DOIUrl":"https://doi.org/10.1109/mocast54814.2022.9837600","url":null,"abstract":"The Associative Memory (AM) ASIC reached its version 8 in 2020 when it was submitted for fabrication. The AM08 has all the functionalities of the final chip, AM09, which was planned for the ATLAS experiment’s Hardware Track Trigger (HTT) system, at the High-Luminosity Large Hadron Collider (HL-LHC) at CERN. It is made in a 28nm CMOS technology with 10 metal layers and comes in a 15 × 15 FCBGA package. Being a digital chip with a full-custom CAM cell design that can store 12,000 patterns (16 bit × 8 words per pattern), and can achieve 6.25 x 1012 comparisons per second. The design and architecture of the chip is presented in this paper. Additionally we discuss the behavioral simulations that run and also the generation of the test vectors purposed for industrial and in-house testing, in VCD and STIL file formats. The laboratory test-benches both for the bare-die chips and the packaged ones are also presented, including the related test-boards. Finally, we discuss the preliminary power measurements and compare these with the post-layout simulations.","PeriodicalId":122414,"journal":{"name":"2022 11th International Conference on Modern Circuits and Systems Technologies (MOCAST)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117310733","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}
Pub Date : 2022-06-08DOI: 10.1109/mocast54814.2022.9837666
Maria Papatsimouli, Konstantinos-Filippos Kollias, L. Lazaridis, George S. Maraslidis, Herakles Michailidis, P. Sarigiannidis, G. Fragulis
There are people who cannot communicate in the same way with others. Deaf and hard-of-hearing people use sign languages for their communication with other people. Sign languages are also used for the communication between deaf and non-deaf people, including different types of hand gestures and facial expressions for communication and emotional expression. Sign language recognition and gesture-based controls are applications that are used by gesture recognition technologies, and it is a fact that this technology has reduced the communication gap, while these systems are used for converting gestures to text or speech. The focus of our research is to analyze real-time sign language translators that are used for language translation. Sign Language Translation Systems that were developed from 2017 to 2021 are analysed in this paper.
{"title":"Real Time Sign Language Translation Systems: A review study","authors":"Maria Papatsimouli, Konstantinos-Filippos Kollias, L. Lazaridis, George S. Maraslidis, Herakles Michailidis, P. Sarigiannidis, G. Fragulis","doi":"10.1109/mocast54814.2022.9837666","DOIUrl":"https://doi.org/10.1109/mocast54814.2022.9837666","url":null,"abstract":"There are people who cannot communicate in the same way with others. Deaf and hard-of-hearing people use sign languages for their communication with other people. Sign languages are also used for the communication between deaf and non-deaf people, including different types of hand gestures and facial expressions for communication and emotional expression. Sign language recognition and gesture-based controls are applications that are used by gesture recognition technologies, and it is a fact that this technology has reduced the communication gap, while these systems are used for converting gestures to text or speech. The focus of our research is to analyze real-time sign language translators that are used for language translation. Sign Language Translation Systems that were developed from 2017 to 2021 are analysed in this paper.","PeriodicalId":122414,"journal":{"name":"2022 11th International Conference on Modern Circuits and Systems Technologies (MOCAST)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123667354","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}
Pub Date : 2022-06-08DOI: 10.1109/mocast54814.2022.9837614
M. Nitas, V. Salonikios, T. Yioultsis, T. Zygiridis, N. Kantartzis, S. Amanatiadis
Substrate Integrated Waveguide (SIW) is a well-established technology in the mm-wave frequency range with several related applications of mm-wave components and antennas. Recently, the Broadside-Coupled Complementary Split-Ring Resonator SIW (BC-CSRR SIW) has been proposed as an alternative to the classical SIW design, utilizing printed resonant metamaterials instead of metallic vias. In this work we explore the wave confinement capability of the BC-CSRR SIW through numerical crosstalk studies. A parametric study is carried out for the minimization of leakage losses, followed by a numerical calculation of crosstalk between adjacent waveguides. BC-CSRR SIW results are compared with the classical SIW configuration exhibiting equivalent behavior.
{"title":"A Crosstalk Study on Metamaterial-Inspired Substrate Integrated Waveguides","authors":"M. Nitas, V. Salonikios, T. Yioultsis, T. Zygiridis, N. Kantartzis, S. Amanatiadis","doi":"10.1109/mocast54814.2022.9837614","DOIUrl":"https://doi.org/10.1109/mocast54814.2022.9837614","url":null,"abstract":"Substrate Integrated Waveguide (SIW) is a well-established technology in the mm-wave frequency range with several related applications of mm-wave components and antennas. Recently, the Broadside-Coupled Complementary Split-Ring Resonator SIW (BC-CSRR SIW) has been proposed as an alternative to the classical SIW design, utilizing printed resonant metamaterials instead of metallic vias. In this work we explore the wave confinement capability of the BC-CSRR SIW through numerical crosstalk studies. A parametric study is carried out for the minimization of leakage losses, followed by a numerical calculation of crosstalk between adjacent waveguides. BC-CSRR SIW results are compared with the classical SIW configuration exhibiting equivalent behavior.","PeriodicalId":122414,"journal":{"name":"2022 11th International Conference on Modern Circuits and Systems Technologies (MOCAST)","volume":"114 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123356204","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}
Pub Date : 2022-06-08DOI: 10.1109/mocast54814.2022.9837700
Dimitris Nikitas, Konstantinos Papafotis, P. Sotiriadis
This work introduces an inertial measurement unit (IMU) architecture which combines several three-axis accelerometers and a three-axes gyroscope to provide an increased accuracy, low-noise measurement of the angular velocity. This is an extension of gyroscope-free IMUs, which use only accelerometers to measure the linear acceleration and translate it to angular velocity by solving a system of differential equations. Existing architectures cannot compensate for the accelerometers’ bias which integrated is translated to a constant drift of angular velocity. The proposed system exploits the basic operating principles of the gyroscope-free IMUs and uses a three-axis gyroscope in a closed-loop configuration to compensate for the effect of the accelerometers’ bias. Focusing on a very popular and highly cited IMU, the stability of the proposed system is proved analytically. Simulation results indicate that the proposed architecture excels in terms of noise performance; in the upper frequency range, it presents up to 30dB less noise at its output compared to the gyroscope.
{"title":"Improving Gyroscope’s Noise Performance By Embedding it in a Closed-Loop Involving Multiple Accelerometers","authors":"Dimitris Nikitas, Konstantinos Papafotis, P. Sotiriadis","doi":"10.1109/mocast54814.2022.9837700","DOIUrl":"https://doi.org/10.1109/mocast54814.2022.9837700","url":null,"abstract":"This work introduces an inertial measurement unit (IMU) architecture which combines several three-axis accelerometers and a three-axes gyroscope to provide an increased accuracy, low-noise measurement of the angular velocity. This is an extension of gyroscope-free IMUs, which use only accelerometers to measure the linear acceleration and translate it to angular velocity by solving a system of differential equations. Existing architectures cannot compensate for the accelerometers’ bias which integrated is translated to a constant drift of angular velocity. The proposed system exploits the basic operating principles of the gyroscope-free IMUs and uses a three-axis gyroscope in a closed-loop configuration to compensate for the effect of the accelerometers’ bias. Focusing on a very popular and highly cited IMU, the stability of the proposed system is proved analytically. Simulation results indicate that the proposed architecture excels in terms of noise performance; in the upper frequency range, it presents up to 30dB less noise at its output compared to the gyroscope.","PeriodicalId":122414,"journal":{"name":"2022 11th International Conference on Modern Circuits and Systems Technologies (MOCAST)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123653662","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}
Pub Date : 2022-06-08DOI: 10.1109/mocast54814.2022.9837597
Franz Alwin Dürrwald, C. Hoyer, J. Wagner, F. Ellinger
A high-speed phase-frequency detector (PFD) based on low-voltage positive emitter-coupled logic realized in a 130nm SiGe BiCMOS technology is investigated in this research work. It is intended for providing accurate and fast phase tracking to synchronize a network of decentralized clocks. With a dead zone of around 15ps, which equals a precision of 5° at 1GHz for symmetrical square wave signals, and no blind zone the PFD is among the fastest reported, while also operating very robustly.
{"title":"An LVPECL-based Phase-Frequency Detector with 15 ps Dead Zone in 130 nm SiGe BiCMOS","authors":"Franz Alwin Dürrwald, C. Hoyer, J. Wagner, F. Ellinger","doi":"10.1109/mocast54814.2022.9837597","DOIUrl":"https://doi.org/10.1109/mocast54814.2022.9837597","url":null,"abstract":"A high-speed phase-frequency detector (PFD) based on low-voltage positive emitter-coupled logic realized in a 130nm SiGe BiCMOS technology is investigated in this research work. It is intended for providing accurate and fast phase tracking to synchronize a network of decentralized clocks. With a dead zone of around 15ps, which equals a precision of 5° at 1GHz for symmetrical square wave signals, and no blind zone the PFD is among the fastest reported, while also operating very robustly.","PeriodicalId":122414,"journal":{"name":"2022 11th International Conference on Modern Circuits and Systems Technologies (MOCAST)","volume":"128 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115962983","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}
Pub Date : 2022-06-08DOI: 10.1109/mocast54814.2022.9837536
H. Ibrahim, M. Darweesh, A. Soltan
Diabetes is a disease in which the body does not adequately process food for energy production. Most of the food we consume is converted into glucose, or sugar, which our bodies use for energy. Moreover, the pancreas, which is an organ located near the stomach, produces insulin, a hormone that aids in the transport of glucose into our bodies’ cells. Diabetes occurs when your body either does not produce enough insulin or does not use its own insulin the way it is supposed to. Sugars accumulate in your blood as a result of this. This is why diabetes is often referred to as "sugar". People with diabetes want to monitor their blood sugar levels constantly and they go to the health centers regularly for checkups. The aim of this paper is to provide a health care system for people, as it is a monitor for glucose level and temperature body. This paper includes a sensor for noninvasive blood glucose using near infrared spectroscopy and a sensor for measuring temperature body. Here, the implementation required less power consumption as the micro-controller will work on a standby mode as it will be activated only when there is a new change in any measure of these sensors.
{"title":"An Optimized Non-Invasive Blood Glucose and Temperature Body Measurement System","authors":"H. Ibrahim, M. Darweesh, A. Soltan","doi":"10.1109/mocast54814.2022.9837536","DOIUrl":"https://doi.org/10.1109/mocast54814.2022.9837536","url":null,"abstract":"Diabetes is a disease in which the body does not adequately process food for energy production. Most of the food we consume is converted into glucose, or sugar, which our bodies use for energy. Moreover, the pancreas, which is an organ located near the stomach, produces insulin, a hormone that aids in the transport of glucose into our bodies’ cells. Diabetes occurs when your body either does not produce enough insulin or does not use its own insulin the way it is supposed to. Sugars accumulate in your blood as a result of this. This is why diabetes is often referred to as \"sugar\". People with diabetes want to monitor their blood sugar levels constantly and they go to the health centers regularly for checkups. The aim of this paper is to provide a health care system for people, as it is a monitor for glucose level and temperature body. This paper includes a sensor for noninvasive blood glucose using near infrared spectroscopy and a sensor for measuring temperature body. Here, the implementation required less power consumption as the micro-controller will work on a standby mode as it will be activated only when there is a new change in any measure of these sensors.","PeriodicalId":122414,"journal":{"name":"2022 11th International Conference on Modern Circuits and Systems Technologies (MOCAST)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133256942","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}
Pub Date : 2022-06-08DOI: 10.1109/mocast54814.2022.9837593
D. Spyropoulos, F. Giannopoulos, C. Spandonidis
Plantar foot measurement systems are used to monitor human gait, which is proven to be a useful tool for many diseases diagnosis and treatment monitoring, such as Parkinson’s and Alzheimer’s. In recent years, many Research and Development teams have been designing and developing instrumented shoes for gait-related data acquisition and wireless transmission using various sensor and electronics technologies, often featuring low power consumption. Working in that direction, the Smart Insole project aims at the development of an integrated system that can act as a gait monitoring and analysis tool for aiding gait-affecting diseases diagnosis, treatment monitoring and personal safety among others. The current work focuses on the main characteristics and initial test results of the developed in-sole device. This device consists of sensors, a powerful microcontroller and dedicated embedded software for high sampling rate and Bluetooth Low Energy communication and has been developed so that it can be integrated in the shoe.
{"title":"Development of a mist computing device for a smart insole aiming on human gait analysis","authors":"D. Spyropoulos, F. Giannopoulos, C. Spandonidis","doi":"10.1109/mocast54814.2022.9837593","DOIUrl":"https://doi.org/10.1109/mocast54814.2022.9837593","url":null,"abstract":"Plantar foot measurement systems are used to monitor human gait, which is proven to be a useful tool for many diseases diagnosis and treatment monitoring, such as Parkinson’s and Alzheimer’s. In recent years, many Research and Development teams have been designing and developing instrumented shoes for gait-related data acquisition and wireless transmission using various sensor and electronics technologies, often featuring low power consumption. Working in that direction, the Smart Insole project aims at the development of an integrated system that can act as a gait monitoring and analysis tool for aiding gait-affecting diseases diagnosis, treatment monitoring and personal safety among others. The current work focuses on the main characteristics and initial test results of the developed in-sole device. This device consists of sensors, a powerful microcontroller and dedicated embedded software for high sampling rate and Bluetooth Low Energy communication and has been developed so that it can be integrated in the shoe.","PeriodicalId":122414,"journal":{"name":"2022 11th International Conference on Modern Circuits and Systems Technologies (MOCAST)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120908839","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}
Pub Date : 2022-06-08DOI: 10.1109/mocast54814.2022.9837534
Christos Chaschatzis, A. Lytos, S. Bibi, T. Lagkas, C. Petaloti, S. Goudos, I. Moscholios, P. Sarigiannidis
The demographic growth of the last centuries has been followed by a demand for higher productivity of agriculture activities and an increase in the quality of farming products. Modern consumers seek quality by selecting foods containing high concentrations of healthy nutrients (e.g., antioxidants, vitamins, minerals) while also valuing eco-friendly practices and sustainable consumption. In line with the modern social needs, integrating Information Communication Technologies (ICT) solutions could assist in different levels of the agriculture lifecycle, such as crop monitoring, animal production, food safety, and farm management. Two aspects that are often neglected from many ICT solutions are the compilation of different data sources into the proposed software architecture and the facilitation of knowledge exchange between domain experts. In order to fill the gap of knowledge accumulation in this paper we take into consideration the PestNu architecture, as defined in section V that illustrates the different steps that are required for a complete data analysis life cycle into the development and deployment of the OpenHub platform. The OpenHub aims to cover the knowledge hub between experts with different backgrounds and promote the best practices from different users with hands-on experience.
{"title":"Integration of Information and Communication Technologies in Agriculture for Farm Management and Knowledge Exchange","authors":"Christos Chaschatzis, A. Lytos, S. Bibi, T. Lagkas, C. Petaloti, S. Goudos, I. Moscholios, P. Sarigiannidis","doi":"10.1109/mocast54814.2022.9837534","DOIUrl":"https://doi.org/10.1109/mocast54814.2022.9837534","url":null,"abstract":"The demographic growth of the last centuries has been followed by a demand for higher productivity of agriculture activities and an increase in the quality of farming products. Modern consumers seek quality by selecting foods containing high concentrations of healthy nutrients (e.g., antioxidants, vitamins, minerals) while also valuing eco-friendly practices and sustainable consumption. In line with the modern social needs, integrating Information Communication Technologies (ICT) solutions could assist in different levels of the agriculture lifecycle, such as crop monitoring, animal production, food safety, and farm management. Two aspects that are often neglected from many ICT solutions are the compilation of different data sources into the proposed software architecture and the facilitation of knowledge exchange between domain experts. In order to fill the gap of knowledge accumulation in this paper we take into consideration the PestNu architecture, as defined in section V that illustrates the different steps that are required for a complete data analysis life cycle into the development and deployment of the OpenHub platform. The OpenHub aims to cover the knowledge hub between experts with different backgrounds and promote the best practices from different users with hands-on experience.","PeriodicalId":122414,"journal":{"name":"2022 11th International Conference on Modern Circuits and Systems Technologies (MOCAST)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125280997","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}
Pub Date : 2022-06-08DOI: 10.1109/mocast54814.2022.9837695
Seokjin Oh, Jiyong An, K. Min
As amounts of data generated from countless and ubiquitous IoT sensors are increased very sharply, memristor crossbars can be considered very suitable to edge intelligence hardware due to high energy efficiency of computing, dense and 3D integration, non-volatility, multi-state memory, CMOS compatible fabrication etc. But, due to the limits of immature fabrication technology, the memristor crossbars can have defects such as stuck-at-faults. To compensate for malfunction of neural networks caused from the fabrication-related defects, in this paper, a simple neuron deactivation scheme is reviewed and analyzed for maximizing its capability to compensate for the neural network’s performance degradation due to the memristor defects. The column deactivation scheme can be particularly useful for the edge intelligence hardware, because the defect map occupying a large amount of memory is not needed during the training. Moreover, the direct mapping from the calculated synaptic weights to the memristor crossbar can save the retraining time required for the defect-aware training scheme.
{"title":"Neuron Deactivation Scheme for Defect-Tolerant Memristor Neural Networks","authors":"Seokjin Oh, Jiyong An, K. Min","doi":"10.1109/mocast54814.2022.9837695","DOIUrl":"https://doi.org/10.1109/mocast54814.2022.9837695","url":null,"abstract":"As amounts of data generated from countless and ubiquitous IoT sensors are increased very sharply, memristor crossbars can be considered very suitable to edge intelligence hardware due to high energy efficiency of computing, dense and 3D integration, non-volatility, multi-state memory, CMOS compatible fabrication etc. But, due to the limits of immature fabrication technology, the memristor crossbars can have defects such as stuck-at-faults. To compensate for malfunction of neural networks caused from the fabrication-related defects, in this paper, a simple neuron deactivation scheme is reviewed and analyzed for maximizing its capability to compensate for the neural network’s performance degradation due to the memristor defects. The column deactivation scheme can be particularly useful for the edge intelligence hardware, because the defect map occupying a large amount of memory is not needed during the training. Moreover, the direct mapping from the calculated synaptic weights to the memristor crossbar can save the retraining time required for the defect-aware training scheme.","PeriodicalId":122414,"journal":{"name":"2022 11th International Conference on Modern Circuits and Systems Technologies (MOCAST)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125407155","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}
Pub Date : 2022-06-08DOI: 10.1109/mocast54814.2022.9837490
Roza Chatzigeorgiou, Panos N. Alevizos, A. Bletsas
Resource allocation in wireless networks, i.e., assigning time and frequency slots over specific terminals under spatio-temporal constraints, is a fundamental and challenging problem. Belief Propagation/message passing (inference) algorithms have been proposed for constraint satisfaction problems (CSP), since they are inherently amenable to distributed implementation. This work compares two message passing algorithms for time and frequency allocation, satisfying signal-to-interference-and-noise-ratio, half-duplex-radio operation and routing constraints. The first method periodically checks whether the constraints are satisfied locally and restarts specific messages, when the local constraints (encoded in corresponding factors) are not satisfied. The second method stochastically perturbs Belief Propagation, using Gibbs sampling. The methods are evaluated, based on how often they fail to converge to a valid (i.e., constraint-satisfying) allocation, coined as outage probability. Numerical results demonstrate that, as the maximum number of iterations increase, both methods decrease the outage probability. However, the restarting method offers faster convergence to a valid CSP solution. Future work will focus on next generation 5/6G wireless networks.
{"title":"Evaluation of Inference Algorithms for Distributed Channel Allocation in Wireless Networks","authors":"Roza Chatzigeorgiou, Panos N. Alevizos, A. Bletsas","doi":"10.1109/mocast54814.2022.9837490","DOIUrl":"https://doi.org/10.1109/mocast54814.2022.9837490","url":null,"abstract":"Resource allocation in wireless networks, i.e., assigning time and frequency slots over specific terminals under spatio-temporal constraints, is a fundamental and challenging problem. Belief Propagation/message passing (inference) algorithms have been proposed for constraint satisfaction problems (CSP), since they are inherently amenable to distributed implementation. This work compares two message passing algorithms for time and frequency allocation, satisfying signal-to-interference-and-noise-ratio, half-duplex-radio operation and routing constraints. The first method periodically checks whether the constraints are satisfied locally and restarts specific messages, when the local constraints (encoded in corresponding factors) are not satisfied. The second method stochastically perturbs Belief Propagation, using Gibbs sampling. The methods are evaluated, based on how often they fail to converge to a valid (i.e., constraint-satisfying) allocation, coined as outage probability. Numerical results demonstrate that, as the maximum number of iterations increase, both methods decrease the outage probability. However, the restarting method offers faster convergence to a valid CSP solution. Future work will focus on next generation 5/6G wireless networks.","PeriodicalId":122414,"journal":{"name":"2022 11th International Conference on Modern Circuits and Systems Technologies (MOCAST)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117049682","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}
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