2010 National Conference On Communications (NCC)最新文献

筛选
英文 中文
Robust LLR aided low feedback precoding for interference alignment 鲁棒LLR辅助低反馈干扰对准预编码
2010 National Conference On Communications (NCC) Pub Date : 2010-03-15 DOI: 10.1109/NCC.2010.5430223
N. Vinoth, A. Ayyar, B. Ramamurthi, K. Giridhar
{"title":"Robust LLR aided low feedback precoding for interference alignment","authors":"N. Vinoth, A. Ayyar, B. Ramamurthi, K. Giridhar","doi":"10.1109/NCC.2010.5430223","DOIUrl":"https://doi.org/10.1109/NCC.2010.5430223","url":null,"abstract":"Interference alignment, as proposed in [1], is a joint multi-base-station precoding technique where each interfering base-station determines its precoder so as to obtain aligned interfering signals at each user. Determination of such precoders requires complete channel state information of all the interfering links to be present at all the base-stations. In this paper, we present a modified form of interference alignment based on locally-available channel state information at the user equipment. We consider the downlink of a wireless system where basestations and user equipments are equiped with two antennas each and scheduling of users is done based on Fractional Frequency Reuse. Assuming an MMSE receiver at the user equipment, an expression for the optimal precoder to be used by the interfering base-stations is derived so that there is zero interference after MMSE equalization. We also give an example for the case where there is uncancelled interference despite the use of these precoders. The effect of this uncancelled interference is overcome by the use of a robust LLR developed in [2]. Simulation results that demonstrate the performance of the proposed technique are presented.","PeriodicalId":130953,"journal":{"name":"2010 National Conference On Communications (NCC)","volume":"4 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":"122234771","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
Performance analysis of zone routing protocols in Mobile Ad Hoc Networks 移动Ad Hoc网络中区域路由协议性能分析
2010 National Conference On Communications (NCC) Pub Date : 2010-03-15 DOI: 10.1109/NCC.2010.5430164
Brijesh V. Patel, S. Srivastava
{"title":"Performance analysis of zone routing protocols in Mobile Ad Hoc Networks","authors":"Brijesh V. Patel, S. Srivastava","doi":"10.1109/NCC.2010.5430164","DOIUrl":"https://doi.org/10.1109/NCC.2010.5430164","url":null,"abstract":"In Mobile Ad Hoc Networks (MANETs), routing is a challenging task due to node mobility, traffic and network size. It is very important to analyze the scalability characteristics of the routing protocols with respect to these parameters. Zone Routing Protocol (ZRP) is considered to be one of the most scalable routing protocols due to its multi-scoping and hybridization features. We propose a general, parameterized model for analyzing control overhead of ZRP. A generic probabilistic model for data traffic is also proposed which can be replaced by different traffic models. Our analytical model is validated by comparisons with simulations performed under different network scenarios. In our simulation results, we have observed that the optimal zone radius lies at a point where proactive and reactive overhead components of ZRP are approximately equal as observed in [1]. Further, as the mobility increases the optimal zone radius value decreases, and as the traffic increases the value of optimal zone radius increases. If a node operates away from the optimal zone radius setting then it has to bear additional routing overhead. We show that the additional overhead is around 35% higher under a wide range of mobility scenarios.","PeriodicalId":130953,"journal":{"name":"2010 National Conference On Communications (NCC)","volume":"86 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":"126167785","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: 35
A multicarrier CDMA based low probability of intercept network 基于低截获概率的多载波CDMA网络
2010 National Conference On Communications (NCC) Pub Date : 2010-03-15 DOI: 10.1109/NCC.2010.5430216
Sayan Ghosal, D. Jalihal, K. Giridhar
{"title":"A multicarrier CDMA based low probability of intercept network","authors":"Sayan Ghosal, D. Jalihal, K. Giridhar","doi":"10.1109/NCC.2010.5430216","DOIUrl":"https://doi.org/10.1109/NCC.2010.5430216","url":null,"abstract":"The need for covert communication in tactical battlefields has developed the ideas of low probability of intercept (LPI) networks. Spread spectrum communication is used for LPI communication. Multicarrier CDMA is a new type of spread spectrum technique that has been developed in recent years. Most of the works in MC-CDMA are focused on finding out BER performance of it when different users share the same time and spectral ranges. But, LPI performance of MC-CDMA is not explored much. In this paper we have focused on understanding the LPI property of MC-CDMA. We have found out that increasing spreading factor and application of forward error control coding improve LPI property of MC-CDMA based wireless networks to a great extent.","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":"130115524","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
Detection of SYN flooding attacks using generalized autoregressive conditional heteroskedasticity (GARCH) modeling technique 基于广义自回归条件异方差(GARCH)建模技术的SYN泛洪攻击检测
2010 National Conference On Communications (NCC) Pub Date : 2010-03-15 DOI: 10.1109/NCC.2010.5430151
Nikhil Ranjan, H. Murthy, T. Gonsalves
{"title":"Detection of SYN flooding attacks using generalized autoregressive conditional heteroskedasticity (GARCH) modeling technique","authors":"Nikhil Ranjan, H. Murthy, T. Gonsalves","doi":"10.1109/NCC.2010.5430151","DOIUrl":"https://doi.org/10.1109/NCC.2010.5430151","url":null,"abstract":"This paper explores a fast and effective method to detect TCP SYN flooding attack. The Generalized autoregressive conditional heteroskedastic (GARCH) model which is the most commonly used statistical modeling technique for financial time series is proposed as a new technique for Denial of service attack detection. The exponential backoff and retransmission property of TCP during timeouts is exploited in the detection mechanism. We are able to detect low as well as high intensity SYN flooding attacks by modeling the difference between SYN and SYN+ACK packets using GARCH. Our studies show that this non linear volatility model performs better than earlier models like Linear Prediction.","PeriodicalId":130953,"journal":{"name":"2010 National Conference On Communications (NCC)","volume":"2018 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":"122958101","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
Resonator based compact ultra-wideband and notched wideband filters 基于谐振器的紧凑型超宽带和陷波宽带滤波器
2010 National Conference On Communications (NCC) Pub Date : 2010-03-15 DOI: 10.1109/NCC.2010.5430168
S. Coumar, R. Nakkeeran, K. Thirumalaivasan
{"title":"Resonator based compact ultra-wideband and notched wideband filters","authors":"S. Coumar, R. Nakkeeran, K. Thirumalaivasan","doi":"10.1109/NCC.2010.5430168","DOIUrl":"https://doi.org/10.1109/NCC.2010.5430168","url":null,"abstract":"In this paper, three ultra wideband (UWB) bandpass filters using microstrip with wide passband, low insertion and return loss are presented. The proposed filters cover the UWB indoor mask range from 3.1GHz to 10.6GHz. The first filter has a circular plate resonator with interdigital coupling has been designed to act as bandpass filter with passband of 8.25 GHz. The second filter is achieved using equilateral octagonal structure by connecting its open stub to ground plane through via-hole. The third filter, which is derived from the first filer is designed to introduce notch in the frequency range from 4.85 to 5.85. The designed filters are successfully simulated by electromagnetic simulator, IE3D. The filters exhibit low insertion loss over the desired passband, and a good out-of-band performance.","PeriodicalId":130953,"journal":{"name":"2010 National Conference On Communications (NCC)","volume":"94 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":"128702680","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: 8
Deriving a generic energy consumption model for network enabled devices 导出网络设备的通用能耗模型
2010 National Conference On Communications (NCC) Pub Date : 2010-03-15 DOI: 10.1109/NCC.2010.5430165
V. Jain, Gerard Parr, Dave Bustard, Philip Morrow
{"title":"Deriving a generic energy consumption model for network enabled devices","authors":"V. Jain, Gerard Parr, Dave Bustard, Philip Morrow","doi":"10.1109/NCC.2010.5430165","DOIUrl":"https://doi.org/10.1109/NCC.2010.5430165","url":null,"abstract":"Energy saving has become a global issue when people use network enabled equipment in the office or at home. However few methods exist to measure and monitor energy use per user or per application, or to control equipment power states. We propose a generic energy consumption model that is based on the power state of network attached equipment, and that supports power management capabilities. This includes measures for each power state (on/off/sleep) and for per bit energy consumption, per interface, per application and at the network QoS (Quality of Services) level. Given the power state of a network device, a network manger could remotely inspect the energy consumption and make changes to the power management setting; for this to happen we introduce a new MIB (Management Information Base) schema to capture the attributes of relevance. Using an agent based modeling framework, we introduce the overall autonomic architecture that makes it possible to minimize energy consumption of network enabled equipment.","PeriodicalId":130953,"journal":{"name":"2010 National Conference On Communications (NCC)","volume":"28 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":"116987336","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: 11
Mitigation of exposed terminals problem with differential capture capable receivers 缓解具有差分捕获能力的接收机的暴露终端问题
2010 National Conference On Communications (NCC) Pub Date : 2010-03-15 DOI: 10.1109/NCC.2010.5430158
Mayur M. Vegad, S. De, Brejesh Lall
{"title":"Mitigation of exposed terminals problem with differential capture capable receivers","authors":"Mayur M. Vegad, S. De, Brejesh Lall","doi":"10.1109/NCC.2010.5430158","DOIUrl":"https://doi.org/10.1109/NCC.2010.5430158","url":null,"abstract":"Recent experimental studies on physical layer capture in 802.11 based networks have demonstrated that the minimum signal-to-interference ratio required for successful reception of a frame depends upon the order of arrivals of the sender's frame and the interference, and it is much less when the sender's frame arrives earlier. This differential capture capability (DCC) leads to a very small interference range around the receiver once it starts receiving a frame, and hence it allows considerable reduction in the required carrier sensing range. While the DCC feature of receivers helps alleviate some hidden and exposed terminal problems, there still remains many exposed nodes. In this paper, we further exploit the DCC feature to mitigate the problem of these exposed terminals that remain even after optimum reduction in carrier sensing range. We propose a liberal carrier sensing scheme that helps identify some of the exposed prospective receivers by using some already available local information and allow them to initiate secondary sessions. Through extensive simulations we demonstrate that the proposed scheme offers significant throughput gain over the conventional carrier sensing scheme that ignores the DCC feature.","PeriodicalId":130953,"journal":{"name":"2010 National Conference On Communications (NCC)","volume":"39 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":"117232563","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
Low-complexity, information-lossless STBCs for two-user MISO-MAC with partial CSIT 具有部分CSIT的双用户MISO-MAC的低复杂度、无信息丢失stbc
2010 National Conference On Communications (NCC) Pub Date : 2010-03-15 DOI: 10.1109/NCC.2010.5430212
J. Harshan, B. Rajan
{"title":"Low-complexity, information-lossless STBCs for two-user MISO-MAC with partial CSIT","authors":"J. Harshan, B. Rajan","doi":"10.1109/NCC.2010.5430212","DOIUrl":"https://doi.org/10.1109/NCC.2010.5430212","url":null,"abstract":"In this paper, Space-Time Block Codes (STBCs) with low Maximum-Likelihood (ML) decoding complexity and information-losslessness property are proposed for a two-user Multiple-Input Single-Output, frequency-flat fading multiple access channel. In particular, two distinct classes of STBC pairs which are derived from the well known class of real orthogonal designs are proposed. The first class of code pairs which are derived from a class of complex designs called separable orthogonal designs are shown to be (i) information-lossless for arbitrary values of Nt (where Nt denotes the number of transmit antennas of each user) and (ii) have reduced ML decoding complexity whereas the second class of code pairs are shown to be (i) information-lossless only for large values of Nt and (ii) are singlesymbol ML decodable.","PeriodicalId":130953,"journal":{"name":"2010 National Conference On Communications (NCC)","volume":"13 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":"122741676","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: 2
Improving time-frequency sparsity for audio spatialization by time-adaptive windowing 利用时间自适应窗提高音频空间化的时频稀疏性
2010 National Conference On Communications (NCC) Pub Date : 2010-03-15 DOI: 10.1109/NCC.2010.5430178
P. Gaddipati, N. Dave, P. Rao, R. Velmurugan
{"title":"Improving time-frequency sparsity for audio spatialization by time-adaptive windowing","authors":"P. Gaddipati, N. Dave, P. Rao, R. Velmurugan","doi":"10.1109/NCC.2010.5430178","DOIUrl":"https://doi.org/10.1109/NCC.2010.5430178","url":null,"abstract":"We propose a new time-adaptive windowing technique to obtain a sparse time-frequency representation for audio signals. This transformation helps in providing better source separation from stereo mixtures for improved subsequent spatial rendering over headphones. We start with standard stereo audio recordings, transform them to a sparse representation and then estimate the mixing parameters to be used for source separation. The performance of the new representation is compared with existing methods via the accuracy of mixing parameters estimation for a test dataset of multi-speaker stereo mixtures.","PeriodicalId":130953,"journal":{"name":"2010 National Conference On Communications (NCC)","volume":"33 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":"125681699","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
Support vector regression based autoassociative models for time series classification 基于支持向量回归的时间序列自关联模型
2010 National Conference On Communications (NCC) Pub Date : 2010-03-15 DOI: 10.1109/NCC.2010.5430179
S. Chandrakala, C. Sekhar
{"title":"Support vector regression based autoassociative models for time series classification","authors":"S. Chandrakala, C. Sekhar","doi":"10.1109/NCC.2010.5430179","DOIUrl":"https://doi.org/10.1109/NCC.2010.5430179","url":null,"abstract":"There are two paradigms for modeling varying length time series data, namely, modeling the sequence of feature vectors and modeling the sets of vectors. In this paper, we propose a regression based autoassociative model for modeling sets of vectors for time series data. We also propose a hybrid framework where a regression based autoassociative model is used for representing varying length time series data and then a discriminative model is used for classification. The proposed approach applied to speech emotion recognition task gives a better performance than the conventional methods.","PeriodicalId":130953,"journal":{"name":"2010 National Conference On Communications (NCC)","volume":"9 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":"133773419","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
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
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