发布求助
文献互助 智能选刊 最新文献

2010 National Conference On Communications (NCC)最新文献

筛选
英文 中文
Coding gain optimized finite impulse response (FIR) Paraunitary (PU) filter banks 编码增益优化有限脉冲响应(FIR)准酉(PU)滤波器组
2010 National Conference On Communications (NCC) Pub Date : 2010-03-15 DOI: 10.1109/NCC.2010.5430199
Ansh Jhawar, Pranav Ginde, P. Patwardhan, V. Gadre
{"title":"Coding gain optimized finite impulse response (FIR) Paraunitary (PU) filter banks","authors":"Ansh Jhawar, Pranav Ginde, P. Patwardhan, V. Gadre","doi":"10.1109/NCC.2010.5430199","DOIUrl":"https://doi.org/10.1109/NCC.2010.5430199","url":null,"abstract":"Filter bank optimization for coding gain maximization for given input statistics has been well studied before. Principal Component Filter Banks (PCFB) have proven to be optimal whenever the minimization objective is a concave function of the subband variances produced by the filter bank. However PCFBs are known to exist for only three special classes of orthonormal filter banks(FBs): Any class of two channel FBs, the transform coder class and the unconstrained order subband coder class. This paper explores the design of FIR Paraunitary(PU) FBs for special case of uniform 3-band subband coder class, giving a detailed analysis of the design method. This method directly maximizes the coding gain. Results have been compared to the PCFB approximation algorithm by Peter Vouras and Trac D. Tran which uses complete parameterization of FIR PU FBs in terms of Givens rotation building blocks.","PeriodicalId":130953,"journal":{"name":"2010 National Conference On Communications (NCC)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126965952","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: 4
On the bounds of separability in sensor networks 传感器网络的可分性边界
2010 National Conference On Communications (NCC) Pub Date : 2010-03-15 DOI: 10.1109/NCC.2010.5430169
B. Krishnan
{"title":"On the bounds of separability in sensor networks","authors":"B. Krishnan","doi":"10.1109/NCC.2010.5430169","DOIUrl":"https://doi.org/10.1109/NCC.2010.5430169","url":null,"abstract":"A pair of target locations are separable if sensor observations can distinguish between the following choices: no targets are present, one target is present at either of the locations or a target is present at each location. The sensors of interest in this paper are binary proximity sensors, whose binary outputs are functions of the distance between the sensor and target. Sensors are deployed randomly according to a Poisson distribution. The probability that two target locations at a distance of r between them are separable is derived. This is extended to derive the probability of having at least Z among M uniformly distributed target locations to be non-separable from the origin. The bounds on this probability are expressed as a function of the sensor density λ.","PeriodicalId":130953,"journal":{"name":"2010 National Conference On Communications (NCC)","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127944400","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
Employing Bayesian Belief Networks for energy efficient Network Management 利用贝叶斯信念网络进行节能网络管理
2010 National Conference On Communications (NCC) Pub Date : 2010-03-15 DOI: 10.1109/NCC.2010.5430172
A. Bashar, G. Parr, S. McClean, B. Scotney, M. Subramanian, S. K. Chaudhari, T. Gonsalves
{"title":"Employing Bayesian Belief Networks for energy efficient Network Management","authors":"A. Bashar, G. Parr, S. McClean, B. Scotney, M. Subramanian, S. K. Chaudhari, T. Gonsalves","doi":"10.1109/NCC.2010.5430172","DOIUrl":"https://doi.org/10.1109/NCC.2010.5430172","url":null,"abstract":"Network Management Systems (NMS) are used to monitor the network and along with Operations Support Systems (OSS) maintain the performance with a focus on guaranteeing sustained QoS to the applications and services. One aspect that is given less importance is the energy consumption of the network elements during the off peak periods. This paper looks at a scenario where the NMS plays an important role in making the network energy efficient by intelligently turning the network elements or their selective ports to sleep mode when they are underutilized. To this end, we propose and evaluate a Bayesian Belief Network (BBN) based Decision Management System (DMS), which provides intelligent decisions to the NMS for it to adaptively alter the operational modes of the network elements, without compromising the performance and QoS constraints. Simulated network has been used to provide the proof of concept followed by discussions on the amount of energy saved and its effect on the network performance.","PeriodicalId":130953,"journal":{"name":"2010 National Conference On Communications (NCC)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131540647","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: 19
Performance analysis of subband-level channel quality indicator feedback scheme of LTE LTE子带级信道质量指标反馈方案的性能分析
2010 National Conference On Communications (NCC) Pub Date : 2010-03-15 DOI: 10.1109/NCC.2010.5430218
Sushruth N. Donthi, N. Mehta
{"title":"Performance analysis of subband-level channel quality indicator feedback scheme of LTE","authors":"Sushruth N. Donthi, N. Mehta","doi":"10.1109/NCC.2010.5430218","DOIUrl":"https://doi.org/10.1109/NCC.2010.5430218","url":null,"abstract":"Frequency-domain scheduling and rate adaptation enable next generation wireless cellular systems such as Long Term Evolution (LTE) to achieve significantly higher downlink throughput. LTE assigns subcarriers in chunks, called physical resource blocks (PRBs), to users to reduce control signaling overhead. To reduce the enormous feedback overhead, the channel quality indicator (CQI) report that is used to feed back channel state information is averaged over a subband, which, in turn, is a group of multiple PRBs. In this paper, we develop closed-form expressions for the throughput achieved by the subband-level CQI feedback mechanism of LTE. We show that the coarse frequency resolution of the CQI incurs a significant loss in throughput and limits the multi-user gains achievable by the system. We then show that the performance can be improved by means of an offset mechanism that effectively makes the users more conservative in reporting their CQI.","PeriodicalId":130953,"journal":{"name":"2010 National Conference On Communications (NCC)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133660599","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: 23
Angle and time of arrival statistics for indoor UWB communication 室内超宽带通信的角度和到达时间统计
2010 National Conference On Communications (NCC) Pub Date : 2010-03-15 DOI: 10.1109/NCC.2010.5430214
Navin Agarwal, Akshaya Mittal, R. Bhattacharjee
{"title":"Angle and time of arrival statistics for indoor UWB communication","authors":"Navin Agarwal, Akshaya Mittal, R. Bhattacharjee","doi":"10.1109/NCC.2010.5430214","DOIUrl":"https://doi.org/10.1109/NCC.2010.5430214","url":null,"abstract":"Wireless communication systems require proper understanding of the spatial and temporal characteristics of the propagation channel. This paper presents a geometrical based single bounce model for indoor ultra wideband (UWB) communication in which the multipath reflection is accounted by uniform distribution of scatterers placed in the clusters of elliptical region around the transmitter (Tx) and receiver (Rx). Analytical expressions for the Angle of Arrival (AoA) and Time of Arrival (ToA) probability density functions (pdfs) have been derived for the proposed model. These expressions have been validated through simulation and the results are also compared with the measured data available in literature.","PeriodicalId":130953,"journal":{"name":"2010 National Conference On Communications (NCC)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131939335","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
Development of CPW-fed UWB Printed slot antenna cpw馈电超宽带印刷槽天线的研制
2010 National Conference On Communications (NCC) Pub Date : 2010-03-15 DOI: 10.1109/NCC.2010.5430173
J. William, R. Nakkeeran
{"title":"Development of CPW-fed UWB Printed slot antenna","authors":"J. William, R. Nakkeeran","doi":"10.1109/NCC.2010.5430173","DOIUrl":"https://doi.org/10.1109/NCC.2010.5430173","url":null,"abstract":"In this paper, design and analysis of compact coplanar waveguide (CPW) fed ultra wideband (UWB) slot antenna is presented. The proposed antenna has a simple structure consisting of a rectangular slot and a triangular patch at the anterior portion of the feed that acts as tuning stub of the antenna. The analysis of the proposed antenna is performed by using MoM based electromagnetic solver, IE3D. The designed antenna is fabricated using FR4 substrate with 1.6 mm thickness. The return loss and standing wave ratio of the developed antenna are measured and compared, which shows that measured result is in good agreement with simulation. With the above structural features the overall dimension of the antenna is 21mm×20mm×1.6mm and the fractional impedance bandwidth of the antenna is about 99% with return loss better than −10 dB (VSWR < 2). It is also seen that the proposed antenna has relatively stable omni directional radiation pattern in the H plane and bidirectional radiation pattern in the E plane over the frequency range of 4.1 GHz to 12.1 GHz. To verify the suitability of the antenna for transmission and reception of narrow pulses, the time domain analysis is also investigated and presented.","PeriodicalId":130953,"journal":{"name":"2010 National Conference On Communications (NCC)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133400611","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: 16
Evaluating vowel pronunciation quality: Formant space matching versus ASR confidence scoring 评估元音发音质量:共振峰空间匹配与ASR可信度评分
2010 National Conference On Communications (NCC) Pub Date : 2010-03-15 DOI: 10.1109/NCC.2010.5430187
Ashish Patil, Chitralekha Gupta, P. Rao
{"title":"Evaluating vowel pronunciation quality: Formant space matching versus ASR confidence scoring","authors":"Ashish Patil, Chitralekha Gupta, P. Rao","doi":"10.1109/NCC.2010.5430187","DOIUrl":"https://doi.org/10.1109/NCC.2010.5430187","url":null,"abstract":"Quantitative evaluation of the quality of a speaker's pronunciation of the vowels of a language can contribute to the important task of speaker accent detection. Our aim is to qualitatively and quantitatively distinguish between native and non-native speakers of a language on the basis of a comparative study of two analysis methods. One deals with relative positions of their vowels in formant (F1-F2) space that conveys important articulatory information. The other method exploits the sensitivity of trained phone models to accent variations, as captured by the log likelihood scores, to distinguish between native and non-native speakers.","PeriodicalId":130953,"journal":{"name":"2010 National Conference On Communications (NCC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121040280","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: 9
Characterizing multi-photon states using gated photo-detection 用门控光探测表征多光子态
2010 National Conference On Communications (NCC) Pub Date : 2010-03-15 DOI: 10.1109/NCC.2010.5430154
S. Krishnamoorthy, S. Thiruthakkathevan, A. Prabhakar
{"title":"Characterizing multi-photon states using gated photo-detection","authors":"S. Krishnamoorthy, S. Thiruthakkathevan, A. Prabhakar","doi":"10.1109/NCC.2010.5430154","DOIUrl":"https://doi.org/10.1109/NCC.2010.5430154","url":null,"abstract":"We describe a system that can temporally separate photons in a multi-photon resolving detector. A time delay, using 239m of optical fibre in a feedback loop sends a part of the incident photon stream back to the system, through a directional coupler. The residual optical power is detected using a gated avalanche photo-detector. The two primary aspects considered while studying this system were the separation of photon pulse in space by the coupler, and the timing aspects of the setup required to achieve synchronization between detector and the source. A timing analysis permits us to verify some properties of the input coherent optical state.","PeriodicalId":130953,"journal":{"name":"2010 National Conference On Communications (NCC)","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116062440","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 GLRT detector in partially correlated texture based compound-Gaussian clutter 基于复合高斯杂波的部分相关纹理GLRT检测器
2010 National Conference On Communications (NCC) Pub Date : 2010-03-15 DOI: 10.1109/NCC.2010.5430182
L. P. Roy, Ratnam V. Raja Kumar
{"title":"A GLRT detector in partially correlated texture based compound-Gaussian clutter","authors":"L. P. Roy, Ratnam V. Raja Kumar","doi":"10.1109/NCC.2010.5430182","DOIUrl":"https://doi.org/10.1109/NCC.2010.5430182","url":null,"abstract":"This paper addresses the problem of target detection in the presence of a non-Gaussian clutter modeled in compound-Gaussian form which realizes the clutter process as a product of two independent random processes ‘texture’ and ‘speckle’. The likelihood ratio test (LRT) detector applied to this detection problem reduces the detector to a matched filter (MF) when the texture is considered as completely correlated during a coherent processing interval (CPI). However, in practical applications, the textural component exhibits a correlation which is less than unity. The conventional form of MF based detectors existing in the literature yield a significant fall in the detection performance in such clutter scenarios. In this paper, we propose a generalized likelihood ratio test (GLRT) detector which can effectively detect a fluctuating target in the presence of a compound-Gaussian clutter with partially correlated texture. The results are presented to show the performance superiority of the proposed detector over the existing MF detector in such varying texture scenarios.","PeriodicalId":130953,"journal":{"name":"2010 National Conference On Communications (NCC)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122015245","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: 13
Fuzzy Directional Features for unconstrained on-line Devanagari handwriting recognition 基于模糊方向特征的无约束在线Devanagari手写识别
2010 National Conference On Communications (NCC) Pub Date : 2010-03-15 DOI: 10.1109/NCC.2010.5430176
V. Lajish, Sunil Kumar Kopparapu
{"title":"Fuzzy Directional Features for unconstrained on-line Devanagari handwriting recognition","authors":"V. Lajish, Sunil Kumar Kopparapu","doi":"10.1109/NCC.2010.5430176","DOIUrl":"https://doi.org/10.1109/NCC.2010.5430176","url":null,"abstract":"This paper describes a novel feature set for recognition of unconstrained on-line handwritten Devanagari script. Experiments are conducted for the automatic recognition of handwritten character primitives (sub-character units) collected without any constraints from different writers. Initially we describe the Fuzzy Directional Feature (FDF) extraction method and then show how these features can be effectively utilized for writer independent Devanagari character recognition. The recognition algorithm uses second order statistics to construct different stroke models. Experimental results show that FDF set out performs commonly used Directional Features (DF) for writer independent data set at stroke level recognition.","PeriodicalId":130953,"journal":{"name":"2010 National Conference On Communications (NCC)","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124123761","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: 14
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信