Pub Date : 2019-11-01DOI: 10.1109/LATINCOM48065.2019.8937924
Massilon Lourenço, F. S. Souza, C. M. Silva, R. Meneguette, D. Guidoni
This work presents DESTINy, a traffic management solution for vehicular network using V2V ad V2I communication. Considering a number of RoadSide Units (RSUs) deployed in the road infrastructure, DESTINy divides the city map into regions and each RSU is responsible to store information about traffic conditions of its responsible roads. When necessary, each vehicle requests information to the closest RSU and using the travel time information of the roads inside the region where the vehicle is, it calculates alternative routes with lower travel time. When forwarding the response message, the vehicles also update their local database in order to reduce the number of transmitted messages. Our solution was evaluated considering different literature solutions and presents better results considering network and traffic metrics, providing a reduction of number of message of approximately 70 % as well as, a reduction in the average travel time about 26%.
{"title":"A Hybrid V2I and V2V Approach for Urban Traffic Management in Vehicular Networks","authors":"Massilon Lourenço, F. S. Souza, C. M. Silva, R. Meneguette, D. Guidoni","doi":"10.1109/LATINCOM48065.2019.8937924","DOIUrl":"https://doi.org/10.1109/LATINCOM48065.2019.8937924","url":null,"abstract":"This work presents DESTINy, a traffic management solution for vehicular network using V2V ad V2I communication. Considering a number of RoadSide Units (RSUs) deployed in the road infrastructure, DESTINy divides the city map into regions and each RSU is responsible to store information about traffic conditions of its responsible roads. When necessary, each vehicle requests information to the closest RSU and using the travel time information of the roads inside the region where the vehicle is, it calculates alternative routes with lower travel time. When forwarding the response message, the vehicles also update their local database in order to reduce the number of transmitted messages. Our solution was evaluated considering different literature solutions and presents better results considering network and traffic metrics, providing a reduction of number of message of approximately 70 % as well as, a reduction in the average travel time about 26%.","PeriodicalId":120312,"journal":{"name":"2019 IEEE Latin-American Conference on Communications (LATINCOM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128482688","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 : 2019-11-01DOI: 10.1109/LATINCOM48065.2019.8937854
Pablo Palacios Játiva, César A. Azurdia-Meza, Milton Román Cañizares, Sandra Céspedes Umaña, S. M. Sánchez
In this paper, the application and benefits of several combining schemes to create diversity at the optical receiver are analyzed and compared in a multi-cell indoor Visible Light Communication (VLC) system. The implementation of a pyramidal Angle Diversity Receiver (ADR) to mitigate the Intercell Interference (ICI) of the system is also analyzed. Thus, three combining schemes in the receiver side are investigated: Select Best Combining (SBC), Equal Gain Combining (EGC), and Maximum Ratio Combining (MRC), which in conjunction with the presented ADR, configure an optical receiver that optimizes the system performance by combining the received signals. The results indicate that the ADR implemented with the MRC scheme outperform the SBC and EGC schemes in terms of signal-to-interference-plus-noise-ratio (SINR) and User Data Rate.
{"title":"Performance Enhancement of VLC-Based Systems Using Diversity Combining Schemes in the Receiver","authors":"Pablo Palacios Játiva, César A. Azurdia-Meza, Milton Román Cañizares, Sandra Céspedes Umaña, S. M. Sánchez","doi":"10.1109/LATINCOM48065.2019.8937854","DOIUrl":"https://doi.org/10.1109/LATINCOM48065.2019.8937854","url":null,"abstract":"In this paper, the application and benefits of several combining schemes to create diversity at the optical receiver are analyzed and compared in a multi-cell indoor Visible Light Communication (VLC) system. The implementation of a pyramidal Angle Diversity Receiver (ADR) to mitigate the Intercell Interference (ICI) of the system is also analyzed. Thus, three combining schemes in the receiver side are investigated: Select Best Combining (SBC), Equal Gain Combining (EGC), and Maximum Ratio Combining (MRC), which in conjunction with the presented ADR, configure an optical receiver that optimizes the system performance by combining the received signals. The results indicate that the ADR implemented with the MRC scheme outperform the SBC and EGC schemes in terms of signal-to-interference-plus-noise-ratio (SINR) and User Data Rate.","PeriodicalId":120312,"journal":{"name":"2019 IEEE Latin-American Conference on Communications (LATINCOM)","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131186490","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 : 2019-11-01DOI: 10.1109/LATINCOM48065.2019.8937965
Samuel Aguilar, Henry W. Merino
Peruvian Navy uses a Supervisory Control and Data Acquisition (SCADA) system to monitor and control its remote meteorological and luminous stations which are out of town and powered by photovoltaic systems. They use cellular gateways with high energy consumption to transmit data to a control center using the services of a mobile service provider. The storage of the obtained information and system management is done in a single location. This paper focuses on the design of an IoT-based solution using LoRaWAN technology and a cloud IoT platform to replace the current system and give mobility, redundancy and efficiency characteristics. The path loss and coverage for the farthest remote station is calculated using the Okumura-Hata propagation model and two radio propagation simulators. A LoRaWAN end-node with meteorological sensors is simulated and a web page is developed to show the information to the users.
{"title":"A Simulation of an IoT-based Solution Using LoRaWAN for Remote Stations of Peruvian Navy","authors":"Samuel Aguilar, Henry W. Merino","doi":"10.1109/LATINCOM48065.2019.8937965","DOIUrl":"https://doi.org/10.1109/LATINCOM48065.2019.8937965","url":null,"abstract":"Peruvian Navy uses a Supervisory Control and Data Acquisition (SCADA) system to monitor and control its remote meteorological and luminous stations which are out of town and powered by photovoltaic systems. They use cellular gateways with high energy consumption to transmit data to a control center using the services of a mobile service provider. The storage of the obtained information and system management is done in a single location. This paper focuses on the design of an IoT-based solution using LoRaWAN technology and a cloud IoT platform to replace the current system and give mobility, redundancy and efficiency characteristics. The path loss and coverage for the farthest remote station is calculated using the Okumura-Hata propagation model and two radio propagation simulators. A LoRaWAN end-node with meteorological sensors is simulated and a web page is developed to show the information to the users.","PeriodicalId":120312,"journal":{"name":"2019 IEEE Latin-American Conference on Communications (LATINCOM)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115482007","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 : 2019-11-01DOI: 10.1109/LATINCOM48065.2019.8937881
R. Reyes, Shabnam Sultana, Vishwanath Vijayakumar Pai, T. Bauschert
This paper presents a comprehensive analysis of the total cost of ownership (TCO) of intra-data centre networks. A cost model is proposed to evaluate the capital (CAPEX) and operational (OPEX) expenditures that stem from the acquisition and operation of the network infrastructure. The cost model is used to evaluate the TCO of selected network architectures, namely, leaf-spine, fat-tree, hybrid fat-tree, Facebook 4-Post and a new Facebook fabric. The goal is to investigate how the TCO scales for different data centre sizes - given by the number of servers housed in the data centre - and for different server port speeds, i.e. 10GbE, 25GbE, 40GbE and 50GbE. The results show that the most cost-efficient network architecture is leaf-spine. Moreover, for all architectures, the switches are the main cost drivers followed by active optical cables, maintenance and reparation and energy consumption. Regarding the server port speeds, an analysis of economies & diseconomies of scale reveals that 25GbE and 50GbE ports provide an economic migration path to upgrade the network capacity. The reason is that these ports provide lower - or comparable - TCOs per server and per unit of bandwidth than 40 GbE. Besides, a sensitivity analysis shows that the changes in the power consumption caused by the traffic load have small impact on the network TCO.
{"title":"Analysis and Evaluation of CAPEX and OPEX in Intra-Data Centre Network Architectures","authors":"R. Reyes, Shabnam Sultana, Vishwanath Vijayakumar Pai, T. Bauschert","doi":"10.1109/LATINCOM48065.2019.8937881","DOIUrl":"https://doi.org/10.1109/LATINCOM48065.2019.8937881","url":null,"abstract":"This paper presents a comprehensive analysis of the total cost of ownership (TCO) of intra-data centre networks. A cost model is proposed to evaluate the capital (CAPEX) and operational (OPEX) expenditures that stem from the acquisition and operation of the network infrastructure. The cost model is used to evaluate the TCO of selected network architectures, namely, leaf-spine, fat-tree, hybrid fat-tree, Facebook 4-Post and a new Facebook fabric. The goal is to investigate how the TCO scales for different data centre sizes - given by the number of servers housed in the data centre - and for different server port speeds, i.e. 10GbE, 25GbE, 40GbE and 50GbE. The results show that the most cost-efficient network architecture is leaf-spine. Moreover, for all architectures, the switches are the main cost drivers followed by active optical cables, maintenance and reparation and energy consumption. Regarding the server port speeds, an analysis of economies & diseconomies of scale reveals that 25GbE and 50GbE ports provide an economic migration path to upgrade the network capacity. The reason is that these ports provide lower - or comparable - TCOs per server and per unit of bandwidth than 40 GbE. Besides, a sensitivity analysis shows that the changes in the power consumption caused by the traffic load have small impact on the network TCO.","PeriodicalId":120312,"journal":{"name":"2019 IEEE Latin-American Conference on Communications (LATINCOM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128658093","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 : 2019-11-01DOI: 10.1109/LATINCOM48065.2019.8937954
Oscar J. Ciceri, Carlos A. Astudillo, N. Fonseca
Passive optical networks (PONs) provide high access capacity to multiple services and applications. However, the deployment of PONs involves significant costs. On the other hand, infrastructure provider (InP) can lease their PONs to several customers. In this paper, we introduce a novel dynamic bandwidth allocation (DBA) algorithm for 10G-EPON called subMOS-IPACT which assures bandwidth at different granularity: individual ONUs, multi-ONU customer, and ONU subgroups. A subgroup is a set of optical network units (ONUs) belonging to the same multi-ONU customer. subMOS-IPACT also prioritized bandwidth distribution among subgroups of the same multi-ONU customer. Simulation results show that the proposed mechanism improves the network performance of multi-ONU customers supporting different services.
{"title":"DBA Algorithm with Prioritized Services for 10G-EPON with Multi-ONU Customers","authors":"Oscar J. Ciceri, Carlos A. Astudillo, N. Fonseca","doi":"10.1109/LATINCOM48065.2019.8937954","DOIUrl":"https://doi.org/10.1109/LATINCOM48065.2019.8937954","url":null,"abstract":"Passive optical networks (PONs) provide high access capacity to multiple services and applications. However, the deployment of PONs involves significant costs. On the other hand, infrastructure provider (InP) can lease their PONs to several customers. In this paper, we introduce a novel dynamic bandwidth allocation (DBA) algorithm for 10G-EPON called subMOS-IPACT which assures bandwidth at different granularity: individual ONUs, multi-ONU customer, and ONU subgroups. A subgroup is a set of optical network units (ONUs) belonging to the same multi-ONU customer. subMOS-IPACT also prioritized bandwidth distribution among subgroups of the same multi-ONU customer. Simulation results show that the proposed mechanism improves the network performance of multi-ONU customers supporting different services.","PeriodicalId":120312,"journal":{"name":"2019 IEEE Latin-American Conference on Communications (LATINCOM)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121603110","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 : 2019-11-01DOI: 10.1109/LATINCOM48065.2019.8937911
Catherine Paola Méndez Rangel, L. Mello
Cognitive radio technology is emerging as an effective alternative to increase the number of users in several frequency bands. The concept aims to solve the scarcity of the spectrum from two basic characteristics: the cognitive capacity and the capacity of reconfiguration. Cognitive ability refers to the ability of the radio to know the medium in which it is operating, to identify in an opportunistic way the unused spectral spaces in their totality or in some intervals of time and, from its reconfiguration transmit information without causing interference in the user of the portion of the spectrum used. This paper presents the results obtained from the analysis of the performance of fusion rules for cooperative remote sensing. First deals with the theoretical foundations of cognitive radio and the different techniques for sensing in cognitive networks, presenting decision schemes and conventional detection of the cooperative spectrum, the Hard decision and Soft decision methods and finally, an evaluation of the rules of cooperative sensing in real scenarios.
{"title":"Analysis of performance of fusion rules for cooperative spectrum sensing","authors":"Catherine Paola Méndez Rangel, L. Mello","doi":"10.1109/LATINCOM48065.2019.8937911","DOIUrl":"https://doi.org/10.1109/LATINCOM48065.2019.8937911","url":null,"abstract":"Cognitive radio technology is emerging as an effective alternative to increase the number of users in several frequency bands. The concept aims to solve the scarcity of the spectrum from two basic characteristics: the cognitive capacity and the capacity of reconfiguration. Cognitive ability refers to the ability of the radio to know the medium in which it is operating, to identify in an opportunistic way the unused spectral spaces in their totality or in some intervals of time and, from its reconfiguration transmit information without causing interference in the user of the portion of the spectrum used. This paper presents the results obtained from the analysis of the performance of fusion rules for cooperative remote sensing. First deals with the theoretical foundations of cognitive radio and the different techniques for sensing in cognitive networks, presenting decision schemes and conventional detection of the cooperative spectrum, the Hard decision and Soft decision methods and finally, an evaluation of the rules of cooperative sensing in real scenarios.","PeriodicalId":120312,"journal":{"name":"2019 IEEE Latin-American Conference on Communications (LATINCOM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114367963","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 : 2019-11-01DOI: 10.1109/LATINCOM48065.2019.8937868
L. Z. Ladeira, A. M. Souza, G. P. R. Filho, Thiago H. Silva, Matheus Ferraroni Sanches, L. Villas
Understand the time interval that an event is contained is key for different decision making services. For instance, a secure route suggestion needs crime data to identify crime hotspots inside a time window and select safe routes. Time windows help to separate distinct situations and focus the analysis within a time interval. Also, the result may provide an insight into the changes that occur during the day. With this in mind, this paper presents an approach to identify mobile and variable time windows with the goal of discovering hotspots, named MARTINI. The hotspots may be used by different types of services that want the granularity applied in this paper. The data is fragmented with the objective to identify the situation according to each day of the week, data type, and more. MARTINI utilizes a Gaussian Distribution Function to describe the event density of different data types and time intervals. In addition, it uses this representation to find out the changes that occur during the day. The results obtained show that MARTINI requires less time to recognize changes in the situation with a 10 minute sensitivity. In addition, it outperforms the smaller time window even with a 2 hour interval.
{"title":"MARTINI: Towards a mobile and variable time window identification for spatio-temporal data","authors":"L. Z. Ladeira, A. M. Souza, G. P. R. Filho, Thiago H. Silva, Matheus Ferraroni Sanches, L. Villas","doi":"10.1109/LATINCOM48065.2019.8937868","DOIUrl":"https://doi.org/10.1109/LATINCOM48065.2019.8937868","url":null,"abstract":"Understand the time interval that an event is contained is key for different decision making services. For instance, a secure route suggestion needs crime data to identify crime hotspots inside a time window and select safe routes. Time windows help to separate distinct situations and focus the analysis within a time interval. Also, the result may provide an insight into the changes that occur during the day. With this in mind, this paper presents an approach to identify mobile and variable time windows with the goal of discovering hotspots, named MARTINI. The hotspots may be used by different types of services that want the granularity applied in this paper. The data is fragmented with the objective to identify the situation according to each day of the week, data type, and more. MARTINI utilizes a Gaussian Distribution Function to describe the event density of different data types and time intervals. In addition, it uses this representation to find out the changes that occur during the day. The results obtained show that MARTINI requires less time to recognize changes in the situation with a 10 minute sensitivity. In addition, it outperforms the smaller time window even with a 2 hour interval.","PeriodicalId":120312,"journal":{"name":"2019 IEEE Latin-American Conference on Communications (LATINCOM)","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128942885","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 : 2019-11-01DOI: 10.1109/LATINCOM48065.2019.8937903
J. Abijaude, L. Santiago, P. Sobreira, Omar Abdul Wahab, F. Greve
Brazil was one of the largest cocoa producers in the World, supported mainly by the South of the Bahia region. After the 1980s, the Witch-broom disease demolished plantations and farmers were forced into bankruptcy. The worldwide search for gourmet cocoa has rekindled interest in this production, whose fermentation and drying processes are key steps in obtaining fine cocoa, thanks to the fact that many processing properties and sensory attributes are developed here. This article presents a Web IoT-based system for the control and monitoring of these events, aiming to catalog valuable information of the process for improvement and future research. A proof of concept was created and the performance of the system was evaluated through the OMNet simulator, where a technique based on the SNMP protocol was applied to reduce the amount of data transmitted over the Web.
{"title":"IoTCocoa - an IoT platform to assist gourmet cocoa production","authors":"J. Abijaude, L. Santiago, P. Sobreira, Omar Abdul Wahab, F. Greve","doi":"10.1109/LATINCOM48065.2019.8937903","DOIUrl":"https://doi.org/10.1109/LATINCOM48065.2019.8937903","url":null,"abstract":"Brazil was one of the largest cocoa producers in the World, supported mainly by the South of the Bahia region. After the 1980s, the Witch-broom disease demolished plantations and farmers were forced into bankruptcy. The worldwide search for gourmet cocoa has rekindled interest in this production, whose fermentation and drying processes are key steps in obtaining fine cocoa, thanks to the fact that many processing properties and sensory attributes are developed here. This article presents a Web IoT-based system for the control and monitoring of these events, aiming to catalog valuable information of the process for improvement and future research. A proof of concept was created and the performance of the system was evaluated through the OMNet simulator, where a technique based on the SNMP protocol was applied to reduce the amount of data transmitted over the Web.","PeriodicalId":120312,"journal":{"name":"2019 IEEE Latin-American Conference on Communications (LATINCOM)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133387774","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 : 2019-11-01DOI: 10.1109/LATINCOM48065.2019.8937882
Washington Medina, Francisco Novillo, Eduardo Chancay, Juan M. Romero-Arguello
The future high demand for wireless services, especially inside smart buildings located in dense urban areas, and the possible saturation of the spectrum used by short-range wireless systems have allowed the search for solutions based on the Dynamic Spectrum Access model. Cognitive Radio system is a proposed solution; it works allowing that an incumbent operator share their available assigned spectrum with other service operator, in order to improve the efficiency on the spectrum use. To know only the availability of an electromagnetic spectrum segment is not enough so there are to check that their use by other operator does not affect to the surrounding incumbent users (e.g. a building inner incumbent users). The objective of this study is to characterize by simulation process the minimal effective spectral availability inside large buildings assuming a deployment of the incumbent system users in their inner, taking in account the shadowing phenomena influence too. The results show that the effective spectral availability is distributed on the 60% smart building inner area for large buildings, and it could decrease between 30% and 40% depending on the shadowing level and the distance from transmitter.
{"title":"Characterizing Effective Spectral Opportunities and Shadowing Influence Inside Large Buildings for Short Range CRWS Use","authors":"Washington Medina, Francisco Novillo, Eduardo Chancay, Juan M. Romero-Arguello","doi":"10.1109/LATINCOM48065.2019.8937882","DOIUrl":"https://doi.org/10.1109/LATINCOM48065.2019.8937882","url":null,"abstract":"The future high demand for wireless services, especially inside smart buildings located in dense urban areas, and the possible saturation of the spectrum used by short-range wireless systems have allowed the search for solutions based on the Dynamic Spectrum Access model. Cognitive Radio system is a proposed solution; it works allowing that an incumbent operator share their available assigned spectrum with other service operator, in order to improve the efficiency on the spectrum use. To know only the availability of an electromagnetic spectrum segment is not enough so there are to check that their use by other operator does not affect to the surrounding incumbent users (e.g. a building inner incumbent users). The objective of this study is to characterize by simulation process the minimal effective spectral availability inside large buildings assuming a deployment of the incumbent system users in their inner, taking in account the shadowing phenomena influence too. The results show that the effective spectral availability is distributed on the 60% smart building inner area for large buildings, and it could decrease between 30% and 40% depending on the shadowing level and the distance from transmitter.","PeriodicalId":120312,"journal":{"name":"2019 IEEE Latin-American Conference on Communications (LATINCOM)","volume":"519 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123412072","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 : 2019-11-01DOI: 10.1109/LATINCOM48065.2019.8937917
L. L. Motta, Rafael S. Mendes, M. H. M. Costa
This paper presents a method for audio compression that makes use of wavelet packet decomposition (WPD), ordering, and polynomial approximation of expressive coefficients. The proposed encoder orders the WPD coefficients for a suitable polynomial approximation found by multiple linear regression. In addition, the method makes use of an adaptive system of rate versus distortion control (ASRDC) to maintain a nearly constant bit-rate in the audio output. A discussion on the flexibility of the encoder to different settings is presented. Lastly, experimental results of the proposed system and those of well-known codecs are compared. The results indicate that the proposed system achieves competitive performance concerning SNR, particularly for some instrumental audios. In objective measures of perceived audio quality, the current implementation of the proposed codec has negative results compared to other codecs. This method provides an efficient way to exploit the key strengths of polynomial approximation to audio compression and can be easily adapted to other data types.
{"title":"An Audio Compression Method Based on Wavelet Packet Decomposition, Ordering, and Polynomial Approximation of Expressive Coefficients","authors":"L. L. Motta, Rafael S. Mendes, M. H. M. Costa","doi":"10.1109/LATINCOM48065.2019.8937917","DOIUrl":"https://doi.org/10.1109/LATINCOM48065.2019.8937917","url":null,"abstract":"This paper presents a method for audio compression that makes use of wavelet packet decomposition (WPD), ordering, and polynomial approximation of expressive coefficients. The proposed encoder orders the WPD coefficients for a suitable polynomial approximation found by multiple linear regression. In addition, the method makes use of an adaptive system of rate versus distortion control (ASRDC) to maintain a nearly constant bit-rate in the audio output. A discussion on the flexibility of the encoder to different settings is presented. Lastly, experimental results of the proposed system and those of well-known codecs are compared. The results indicate that the proposed system achieves competitive performance concerning SNR, particularly for some instrumental audios. In objective measures of perceived audio quality, the current implementation of the proposed codec has negative results compared to other codecs. This method provides an efficient way to exploit the key strengths of polynomial approximation to audio compression and can be easily adapted to other data types.","PeriodicalId":120312,"journal":{"name":"2019 IEEE Latin-American Conference on Communications (LATINCOM)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122560937","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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