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
Orthogonal frequency division multiple access in WiMAX and LTE — A comparison WiMAX与LTE正交频分多址的比较
2010 National Conference On Communications (NCC) Pub Date : 2012-09-10 DOI: 10.1109/MCOM.2012.6295726
S. Srikanth, P. Pandian, Xavier N Fernando
{"title":"Orthogonal frequency division multiple access in WiMAX and LTE — A comparison","authors":"S. Srikanth, P. Pandian, Xavier N Fernando","doi":"10.1109/MCOM.2012.6295726","DOIUrl":"https://doi.org/10.1109/MCOM.2012.6295726","url":null,"abstract":"Orthogonal frequency division multiple access (OFDMA) has been adopted by all the proposals which have been considered for the fourth generation (4G) wireless technologies. Specifically, the two main contenders in the 4G marketplace are likely to be evolutions of WiMAX and LTE. In this work, we compare the use of OFDMA in these standards.","PeriodicalId":130953,"journal":{"name":"2010 National Conference On Communications (NCC)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127665758","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
Elliptic slot antenna for broadband wireless communications 宽带无线通信用椭圆槽天线
2010 National Conference On Communications (NCC) Pub Date : 2010-03-15 DOI: 10.1109/NCC.2010.5430171
D. Packiaraj, M. Ramesh, A. T. Kalghatgi, K. Vinoy
{"title":"Elliptic slot antenna for broadband wireless communications","authors":"D. Packiaraj, M. Ramesh, A. T. Kalghatgi, K. Vinoy","doi":"10.1109/NCC.2010.5430171","DOIUrl":"https://doi.org/10.1109/NCC.2010.5430171","url":null,"abstract":"This paper presents the design of a broadband antenna suitable for wireless communications operating over the frequency range of 3.1–10.6GHz. Parametric studies on the effect of stub and elliptic slot have been carried out to arrive at optimum dimensions to achieve enhanced bandwidth of the proposed antenna. An experimental antenna has been designed and tested to validate the proposed design. Measured return loss characteristics have been compared against the simulation results. Simulated radiation patterns at 3.1GHz, 6.85GHz and 10.6GHz have also been presented in this paper.","PeriodicalId":130953,"journal":{"name":"2010 National Conference On Communications (NCC)","volume":"11 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":"123149825","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
Survivability analysis under non-uniform stochastically dependent node damages 非均匀随机依赖节点损伤下的生存能力分析
2010 National Conference On Communications (NCC) Pub Date : 2010-03-15 DOI: 10.1109/NCC.2010.5430150
P. Manohar, Maryna Vereshchaka, D. Manjunath
{"title":"Survivability analysis under non-uniform stochastically dependent node damages","authors":"P. Manohar, Maryna Vereshchaka, D. Manjunath","doi":"10.1109/NCC.2010.5430150","DOIUrl":"https://doi.org/10.1109/NCC.2010.5430150","url":null,"abstract":"In this paper, we analyze survivability of a wireless sensor network under a non-uniform damage model. The analysis assumes statistically dependent damages or node failures. Specifically, the damage process is represented by a non homogeneous Poisson-Boolean model. Network traffic surviving the damage process is analyzed using survivability measures like expected number of surviving node pairs. Numerical results illustrate the analysis.","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":"121814653","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
Performance of L-MRC receiver over independent Hoyt fading channels L-MRC接收机在独立霍伊特衰落信道上的性能
2010 National Conference On Communications (NCC) Pub Date : 2010-03-15 DOI: 10.1109/NCC.2010.5430232
R. Subadar, P. R. Sahu
{"title":"Performance of L-MRC receiver over independent Hoyt fading channels","authors":"R. Subadar, P. R. Sahu","doi":"10.1109/NCC.2010.5430232","DOIUrl":"https://doi.org/10.1109/NCC.2010.5430232","url":null,"abstract":"Performance of a maximal ratio combining receiver has been analyzed in independent Hoyt fading channels for an arbitrary number (L) of branches. Mathematical expressions for the probability density function of the combiner output signal-to-noise ratio, amount of fading, outage probability and the average bit error rate performance for binary, coherent and non-coherent modulations have been presented. A study on the upper bound of the truncation error of the expressions containing infinite series has been provided. Obtained expressions have been numerically evaluated and plotted. A study on the effect of the fading parameter and the number of diversity branches on the receiver performance has also been presented.","PeriodicalId":130953,"journal":{"name":"2010 National Conference On Communications (NCC)","volume":"16 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":"117017727","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
Interference alignment as a tool in network coding as applied to distributed storage 干扰对准作为网络编码中的一种工具在分布式存储中的应用
2010 National Conference On Communications (NCC) Pub Date : 2010-03-15 DOI: 10.1109/NCC.2010.5430242
K. V. Rashmi, Nihar B. Shah, P. V. Kumar, K. Ramchandran
{"title":"Interference alignment as a tool in network coding as applied to distributed storage","authors":"K. V. Rashmi, Nihar B. Shah, P. V. Kumar, K. Ramchandran","doi":"10.1109/NCC.2010.5430242","DOIUrl":"https://doi.org/10.1109/NCC.2010.5430242","url":null,"abstract":"In this paper, we outline an approach to the task of designing network codes in a non-multicast setting. Our approach makes use of the concept of interference alignment. As an example, we consider the distributed storage problem where the data is stored across the network in n nodes and where a data collector can recover the data by connecting to any k of the n nodes and where furthermore, upon failure of a node, a new node can replicate the data stored in the failed node while minimizing the repair bandwidth.","PeriodicalId":130953,"journal":{"name":"2010 National Conference On Communications (NCC)","volume":"36 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":"128336627","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: 5
Discriminative training of Gaussian mixture speaker models: A new approach 高斯混合说话人模型的判别训练:一种新方法
2010 National Conference On Communications (NCC) Pub Date : 2010-03-15 DOI: 10.1109/NCC.2010.5430204
M. Srikanth, H. Murthy
{"title":"Discriminative training of Gaussian mixture speaker models: A new approach","authors":"M. Srikanth, H. Murthy","doi":"10.1109/NCC.2010.5430204","DOIUrl":"https://doi.org/10.1109/NCC.2010.5430204","url":null,"abstract":"Conventional speaker recognition systems use Gaussian mixture models (GMM) to model a speaker's voice based on the speaker's acoustic characteristics. This method is categorized as a non-discriminative training process, as the model-building process does not take into account the negative examples of the speaker. To increase the discriminative properties of a GMM for each speaker, a new approach that includes both positive and negative examples during the speaker training process is proposed. In this approach, speaker models are trained by moving the mixture model's means in such a way as to maximize the likelihood of speaker data while also minimizing the likelihood of negative examples for the speaker. The effectiveness of this approach on classification accuracies on speaker recognition tasks is tested on the NTIMIT database and NIST SRE 2003 corpora. The results indicate improvements in the performance of the system built using this new approach when compared to the traditional GMM-based speaker recognition systems.","PeriodicalId":130953,"journal":{"name":"2010 National Conference On Communications (NCC)","volume":"8 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":"128714931","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: 10
VC-1 video decoder optimization on ARM Cortex-A8 with NEON 基于NEON的ARM Cortex-A8上VC-1视频解码器优化
2010 National Conference On Communications (NCC) Pub Date : 2010-03-15 DOI: 10.1109/NCC.2010.5430200
C. Pujara, Anurag Modi, G. Sandeep, Shilpa Inamdar, Deepa Kolavil, V. Tholath
{"title":"VC-1 video decoder optimization on ARM Cortex-A8 with NEON","authors":"C. Pujara, Anurag Modi, G. Sandeep, Shilpa Inamdar, Deepa Kolavil, V. Tholath","doi":"10.1109/NCC.2010.5430200","DOIUrl":"https://doi.org/10.1109/NCC.2010.5430200","url":null,"abstract":"Optimization of VC-1 Main profile decoder has been proposed using SIMD engine (NEON) of ARM Cortex-A8 processor. We have exploited data level parallelism to effectively use the SIMD capability of NEON. Ideas to make the algorithms SIMD friendly are also highlighted. With effective use of ARM Cortex- A8 architecture and NEON SIMD engine, the MCPS (Mega Cycles per second) requirement for decoding has reduced considerably as compared to our optimized C implementation. Results are provided for the overall performance gain in decoding and individual performance gain in various modules of VC-1 Main profile decoder.","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":"126381173","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: 5
Finite-SNR Diversity Multiplexing Tradeoff of SIMO diversity combining schemes under Nakagami-m fading Nakagami-m衰落下SIMO分集组合方案的有限信噪比分集复用权衡
2010 National Conference On Communications (NCC) Pub Date : 2010-03-15 DOI: 10.1109/NCC.2010.5430211
Nandita Lavanis, D. Jalihal
{"title":"Finite-SNR Diversity Multiplexing Tradeoff of SIMO diversity combining schemes under Nakagami-m fading","authors":"Nandita Lavanis, D. Jalihal","doi":"10.1109/NCC.2010.5430211","DOIUrl":"https://doi.org/10.1109/NCC.2010.5430211","url":null,"abstract":"Multiple Antenna (MA) systems are fundamental in wireless communications. MA systems provide two kinds of advantages, namely diversity gain and multiplexing gain. However, there is an inherent tradeoff between the two, under slow fading conditions and is captured in [1] under asymptotically high signal to noise ratio (SNR). This is known as the Diversity Multiplexing Tradeoff (DMT). It has emerged as a performance criterion for wireless systems and has been generalized to finite-SNR in [2]. In this paper the finite-SNR DMT of rate-adaptive receive diversity combining schemes, namely Maximum Ratio Combining (MRC) and Selection Combining (SC) in presence of Nakagami-m fading, is derived. Closed form expressions of the finite-SNR DMT of Single Input Multiple Output (SIMO) diversity combining schemes are obtained. From the finite-SNR DMT curves, this paper concludes that at especially low SNR, i.e. SNR less than 20 dB, rate-adaptive SIMO-MRC scheme performs better than SIMO-SC, when the fading parameter m is same on all the paths. However, the performance of SIMO-SC catches up with that of SIMO-MRC at higher SNR.","PeriodicalId":130953,"journal":{"name":"2010 National Conference On Communications (NCC)","volume":"22 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":"126468117","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: 5
A new diagonally layered spatial multiplexing scheme with limited feedback 一种新的有限反馈对角线分层空间复用方案
2010 National Conference On Communications (NCC) Pub Date : 2010-03-15 DOI: 10.1109/NCC.2010.5430234
M. Deepti, R. D. Koilpillai
{"title":"A new diagonally layered spatial multiplexing scheme with limited feedback","authors":"M. Deepti, R. D. Koilpillai","doi":"10.1109/NCC.2010.5430234","DOIUrl":"https://doi.org/10.1109/NCC.2010.5430234","url":null,"abstract":"Multiple antenna wireless technology has the potential to enable high data rate wireless applications. To realize the spatial diversity offered by a MIMO system, either the receiver has to perform complex signal processing (such as ML decoding) or the transmitter has to preprocess the signals which requires channel knowledge at the transmitter, often through a feedback link. In this paper, we propose a new space-time signaling scheme for an Nr × Nt MIMO system that improves the diversity gain of the weak layers by encoding information along multiple dimensions and interleaving the co-ordinates of the symbols over all the layers. We prove analytically that the proposed scheme achieves full spatial diversity of NtNr. We also present simulation results that confirm our analytical results and show the superior performance of our method in comparison with existing methods. When compared with other diagonally layered schemes, the proposed scheme requires a very low feedback of log2Nt! bits and attains full diversity at the cost of a slight increase in coding and decoding complexity.","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":"121730453","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
Subcarrier and power adaptation for multiuser OFDM-based cognitive radio systems 基于ofdm的多用户认知无线电系统的子载波和功率自适应
2010 National Conference On Communications (NCC) Pub Date : 2010-03-15 DOI: 10.1109/NCC.2010.5430230
G. Bansal, Z. Hasan, Jahangir Hossain, V. Bhargava
{"title":"Subcarrier and power adaptation for multiuser OFDM-based cognitive radio systems","authors":"G. Bansal, Z. Hasan, Jahangir Hossain, V. Bhargava","doi":"10.1109/NCC.2010.5430230","DOIUrl":"https://doi.org/10.1109/NCC.2010.5430230","url":null,"abstract":"This paper investigates the subcarrier and power allocation problem for an OFDM-based multiuser cognitive radio (CR) system. For CR systems it is important to keep the interference introduced to the primary user (PU) band within a tolerable range. Since the joint subcarrier and power allocation problem is a non-convex integer problem and a closed form solution is difficult to find, a suboptimal algorithm that separates subcarrier and power allocation is proposed. First, a suboptimal subcarrier algorithm is proposed that allocates subcarriers to CR users that not only increase the capacity, but also reduces the interference introduced to the primary user (PU) band. Further, for a given subcarrier allocation an optimal power loading algorithm is proposed that maximizes the capacity of CR users while keeping the interference introduced to the PU band and the total power below a threshold. Simulation results show that for CR systems the proposed algorithm is able to load power into the subcarriers while keeping the interference below a specified threshold.","PeriodicalId":130953,"journal":{"name":"2010 National Conference On Communications (NCC)","volume":"37 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":"131751525","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: 40
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