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An evaluation of erasure decoding algorithms for Gabidulin codes 加比都林码的擦除译码算法的评价
2014 International Telecommunications Symposium (ITS) Pub Date : 2014-11-06 DOI: 10.1109/ITS.2014.6947968
Ricardo Bohaczuk Venturelli, Danilo Silva
{"title":"An evaluation of erasure decoding algorithms for Gabidulin codes","authors":"Ricardo Bohaczuk Venturelli, Danilo Silva","doi":"10.1109/ITS.2014.6947968","DOIUrl":"https://doi.org/10.1109/ITS.2014.6947968","url":null,"abstract":"Gabidulin codes are linear block codes over an extension field that can be seen as the analogs of Reed-Solomon codes for the rank metric. Important applications of Gabidulin codes include the areas of network coding and distributed storage, particularly for the problem of rank erasure correction. This paper studies the complexity of erasure decoding algorithms for Gabidulin codes with short-to-moderate (not asymptotically long) block lengths. The two fastest known algorithms are compared in detail (in terms of exact number of operations) and it is shown for which parameter values one algorithm is superior to the other.","PeriodicalId":359348,"journal":{"name":"2014 International Telecommunications Symposium (ITS)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116284890","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
An unequal coding scheme for remote sensing systems based on CCSDS recommendations 基于CCSDS建议的遥感系统非等差编码方案
2014 International Telecommunications Symposium (ITS) Pub Date : 2014-11-06 DOI: 10.1109/ITS.2014.6947971
C. Schwartz, Fabio da Silva Marques, Marcelo da Silva Pinho
{"title":"An unequal coding scheme for remote sensing systems based on CCSDS recommendations","authors":"C. Schwartz, Fabio da Silva Marques, Marcelo da Silva Pinho","doi":"10.1109/ITS.2014.6947971","DOIUrl":"https://doi.org/10.1109/ITS.2014.6947971","url":null,"abstract":"This paper proposes an unequal error protection (UEP) coding scheme based on two standards recommended by the CCSDS (The Consultative Committee for Space Data Systems). The first recommendation (CCSDS 122.0-B-1) specifies an image compressor for aerospace applications, while the second recommendation (CCSDS 131.0-B-1) specifies channel coding systems on a equal error protection (EEP) scheme. Based on these two recommendations, an UEP can be proposed to enhance the performance of the communication system. The results show gains in PSNR of up to 29 dB on the received image. To achieve these results, a small addition was made into the compressor code to generate a side file with some extra information about the compressed bitstream. This information can be used by the rest of the system to achieve the UEP and helps in some synchronization of the bitstream on the decoder side.","PeriodicalId":359348,"journal":{"name":"2014 International Telecommunications Symposium (ITS)","volume":"14 6 Pt 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116823640","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
Spectral and energy efficiency with satisfaction constraints 具有满足约束的光谱和能量效率
2014 International Telecommunications Symposium (ITS) Pub Date : 2014-11-06 DOI: 10.1109/ITS.2014.6948045
Weskley V. F. Maurício, F. Lima, T. Maciel, F. Cavalcanti
{"title":"Spectral and energy efficiency with satisfaction constraints","authors":"Weskley V. F. Maurício, F. Lima, T. Maciel, F. Cavalcanti","doi":"10.1109/ITS.2014.6948045","DOIUrl":"https://doi.org/10.1109/ITS.2014.6948045","url":null,"abstract":"In this article we revisit the Radio Resource Allocation (RRA) problem of maximizing the total transmit data rate subject to satisfaction guarantees. It was previously studied on the perspective of Resource Block (RB) assignment (only) considering Equal Power Allocation (EPA) and, herein, we study this problem assuming adaptive power allocation. Two power allocation strategies are proposed and shown to be able to achieve energy and/or spectral efficiency gains compared to the original solution proposed in the literature. While the first power allocation strategy is capable of saving a considerable amount of transmit power maintaining the same transmit data rate of EPA, thus obtaining energy efficiency gains, the second strategy is able to convert this energy efficiency gain in spectral efficiency.","PeriodicalId":359348,"journal":{"name":"2014 International Telecommunications Symposium (ITS)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131771092","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Hartley, cosine and sine fractional transforms over Finite Fields 哈特利，有限域上的余弦和正弦分数变换
2014 International Telecommunications Symposium (ITS) Pub Date : 2014-11-06 DOI: 10.1109/ITS.2014.6948004
P. H. E. S. Lima, R. M. Campello de Souza, Juliano B. Lima
{"title":"Hartley, cosine and sine fractional transforms over Finite Fields","authors":"P. H. E. S. Lima, R. M. Campello de Souza, Juliano B. Lima","doi":"10.1109/ITS.2014.6948004","DOIUrl":"https://doi.org/10.1109/ITS.2014.6948004","url":null,"abstract":"We introduce finite field versions of fractional Hartley, sine and cosine types 1 and 4 transforms using a matrix function approach. The proposed definitions employ a finite field extension of matrix functions, which does not require the construction of an eigenvector set of the corresponding transform. We also present a relationship between the Fourier and the Hartley fractional matrices and make a preliminary discussion concerning application scenarios for the developed theory.","PeriodicalId":359348,"journal":{"name":"2014 International Telecommunications Symposium (ITS)","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133764958","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Analysis of interference alignment for wireless communication with external interference 有外部干扰的无线通信干扰对准分析
2014 International Telecommunications Symposium (ITS) Pub Date : 2014-11-06 DOI: 10.1109/ITS.2014.6947972
P. G. Normando, C. Bandeira, D. C. Moreira, W. Freitas, Y. Silva, F. Cavalcanti
{"title":"Analysis of interference alignment for wireless communication with external interference","authors":"P. G. Normando, C. Bandeira, D. C. Moreira, W. Freitas, Y. Silva, F. Cavalcanti","doi":"10.1109/ITS.2014.6947972","DOIUrl":"https://doi.org/10.1109/ITS.2014.6947972","url":null,"abstract":"In order to better cope with the increasing levels of interference in wireless cellular systems, interference mitigation techniques that consider a certain degree of coordination/cooperation among cells have been recently employed, such as Joint Processing (JP) and Interference Alignment (IA). In this paper we evaluate the performance of different IA-based algorithms in the presence of uncoordinated external interference, with JP schemes used as a benchmark. Sum rate and Bit Error Rate (BER) results are presented for different external interference scenarios and it is shown that there is trade-off between IA and JP, and that for high external interference levels IA algorithms modified to handle this external interference can achieve better BER performances.","PeriodicalId":359348,"journal":{"name":"2014 International Telecommunications Symposium (ITS)","volume":"290 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116401369","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A comparative study of non-MSE criteria in nonlinear equalization 非线性均衡中非均方误差准则的比较研究
2014 International Telecommunications Symposium (ITS) Pub Date : 2014-11-06 DOI: 10.1109/ITS.2014.6947953
L. Boccato, D. G. Silva, D. Fantinato, R. Ferrari, R. Attux
{"title":"A comparative study of non-MSE criteria in nonlinear equalization","authors":"L. Boccato, D. G. Silva, D. Fantinato, R. Ferrari, R. Attux","doi":"10.1109/ITS.2014.6947953","DOIUrl":"https://doi.org/10.1109/ITS.2014.6947953","url":null,"abstract":"This work studies the application of non-MSE criteria to adapt the linear readout of Extreme Learning Machines (ELMs) in the context of communication channel equalization. A qualitative and experimental analysis is performed, in terms of bit error rate, optimization surface and decision boundary. The results reached by the ELM-based equalizer, considering three different noise models, did not reveal clear advantages of using criteria based on the concepts of error entropy, correntropy, and the L1-norm of the error. Notwithstanding, the observed results motivate a theoretical investigation on the conditions under which the potential discrepancies between the optimal solutions of these criteria may be stressed.","PeriodicalId":359348,"journal":{"name":"2014 International Telecommunications Symposium (ITS)","volume":"203 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123888854","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Techno-economic evaluation of wireless access technologies for campi network environments campi网络环境下无线接入技术的技术经济评价
2014 International Telecommunications Symposium (ITS) Pub Date : 2014-11-06 DOI: 10.1109/ITS.2014.6948050
Lilia A. G. Moreira, W. Zucchi
{"title":"Techno-economic evaluation of wireless access technologies for campi network environments","authors":"Lilia A. G. Moreira, W. Zucchi","doi":"10.1109/ITS.2014.6948050","DOIUrl":"https://doi.org/10.1109/ITS.2014.6948050","url":null,"abstract":"The widespread use of wireless access networks caused a rapid and continuous growth of this segment under telecommunications industry by democratizing the use of wireless embedded devices what drives organizations to deploy this type of access into their network environments. It is critical that organizations obtain relevant technical and economic knowledge to support their decision-making process towards identifying the technological option with the best technical and economic feasibility. The aim of this work is to develop a techno-economic evaluation method for Wi-Fi, WiMAX and Mobile Networks. The evaluation targets campi network environments and consists of two criteria: the technical parameter that estimates the cell coverage and capacity, and the economic parameter that estimates the costs for Capital Expendures (CAPEX) and Operational Expendures (OPEX). Additionally, the proposed evaluation method is applied to a case study for a public university campus located in the city of São Paulo. It was concluded that the Wi-Fi technology is inexpensive compared to other evaluated technologies highlighting technical limitations as coverage in outdoor environment. The contribution of this work is to present a techno-economic evaluation method of wireless access technologies for campi network environments, and which considers Brazilian market conditions given this segment is expanding in Brazil.","PeriodicalId":359348,"journal":{"name":"2014 International Telecommunications Symposium (ITS)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125638822","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Power-rate control with directional transmission and reception in a cognitive radio network 认知无线网络中定向发送和接收的功率速率控制
2014 International Telecommunications Symposium (ITS) Pub Date : 2014-11-06 DOI: 10.1109/ITS.2014.6948040
S. Montejo Sanchez, S. Mafra, R. Souza, E. Fernández
{"title":"Power-rate control with directional transmission and reception in a cognitive radio network","authors":"S. Montejo Sanchez, S. Mafra, R. Souza, E. Fernández","doi":"10.1109/ITS.2014.6948040","DOIUrl":"https://doi.org/10.1109/ITS.2014.6948040","url":null,"abstract":"We study the benefits that antenna directivity and power control can bring to a cognitive radio ad hoc network, in terms of concurrent transmission probability, throughput and energy efficiency. The proposed strategies adequately adjust antenna beam pattern and the transmit power of the secondary users to increase the spectrum reuse while respecting a given constraint on the achievable primary rate. Two power control strategies are described: Rate-Efficient Power Control with Directional Transmission and Reception to maximize the secondary channel rate, and Energy-Efficient Power Control with Directional Transmission and Reception to maximize the energy efficiency of the secondary link. Numerical results show that the proposed schemes increase the concurrent transmission probability and that it is possible to increase the average rate and save energy with a lower cost than that of other proposals.","PeriodicalId":359348,"journal":{"name":"2014 International Telecommunications Symposium (ITS)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117076270","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Evaluation of utility-based Adaptive resource and Power Allocation for real time services in OFDMA systems 基于效用的OFDMA系统实时业务自适应资源和功率分配评估
2014 International Telecommunications Symposium (ITS) Pub Date : 2014-11-06 DOI: 10.1109/ITS.2014.6947997
Y. Melo, E. Rodrigues, F. Lima, T. Maciel, F. Cavalcanti
{"title":"Evaluation of utility-based Adaptive resource and Power Allocation for real time services in OFDMA systems","authors":"Y. Melo, E. Rodrigues, F. Lima, T. Maciel, F. Cavalcanti","doi":"10.1109/ITS.2014.6947997","DOIUrl":"https://doi.org/10.1109/ITS.2014.6947997","url":null,"abstract":"This paper analyzes the performance of Adaptive Power Allocation (APA) based on (multi-level) water filling as a novel extension of a utility-based Radio Resource Allocation (RRA) framework designed for Real Time (RT) service provision in Orthogonal Frequency Division Multiple Access (OFDMA)-based systems. We evaluate capacity, satisfaction and fairness improvements that originate from exploiting the high degree of flexibility of RRA in the context of OFDMA systems and particularly, concentrate on optimal power allocation combined with utility-based scheduling. Results show that Delay-based Satisfaction Maximization (DSM) presents the best performance to maximize user satisfaction in comparison with classical algorithms and conclude also that benefit of APA is marginal compared to Equal Power Allocation (EPA).","PeriodicalId":359348,"journal":{"name":"2014 International Telecommunications Symposium (ITS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121020636","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Spectral efficiency and aggregate capacity in cognitive radio networks- An application study 认知无线电网络中的频谱效率和总容量——应用研究
2014 International Telecommunications Symposium (ITS) Pub Date : 2014-11-06 DOI: 10.1109/ITS.2014.6948046
H. Pimentel, P. Cardieri
{"title":"Spectral efficiency and aggregate capacity in cognitive radio networks- An application study","authors":"H. Pimentel, P. Cardieri","doi":"10.1109/ITS.2014.6948046","DOIUrl":"https://doi.org/10.1109/ITS.2014.6948046","url":null,"abstract":"Cognitive radio could help to overcome the spectrum shortage by having an opportunistic system sharing a licensed spectrum with primary users. One of the main difficulties in the analysis of cognitive radio systems is to model the interference. Various works presented this modeling for two pairs of wireless users, one primary and one cognitive. Others consider two random overlaid networks. The approaches usually consider variations in densities, distances and power transmission (specially) of the cognitive users. However, the alternatives to implement such systems can lead to some disadvantages inherent in the procedures adopted. This work presents an analysis of a scenario where a cognitive radio network shares the spectrum with a primary network, searching always to opportunities to take advantage of any possibility to increase its capacity. The network users (primary and cognitive) are distributed according to a Poisson Point Process (PPP), and use M-QAM modulation schemes. This first approach considers a cognitive system that can work using different modulation schemes, increasing or decreasing its M-QAM modulation level according the better or the worse noise channel conditions respectively, searching for the optimum performance for its traffic demand without disturbing the primary users.","PeriodicalId":359348,"journal":{"name":"2014 International Telecommunications Symposium (ITS)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115820109","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
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