2016 Twenty Second National Conference on Communication (NCC)最新文献_第5页

Effective ranging techniques in LTE LTE中的有效测距技术

2016 Twenty Second National Conference on Communication (NCC) Pub Date : 2016-03-04 DOI: 10.1109/NCC.2016.7561211

S. V. Ramanan, C. Venkatesh, K. Giridhar

引用次数: 0

A Neural Network based system for Intrusion Detection and attack classification 基于神经网络的入侵检测与攻击分类系统

2016 Twenty Second National Conference on Communication (NCC) Pub Date : 2016-03-04 DOI: 10.1109/NCC.2016.7561088

Basant Subba, S. Biswas, S. Karmakar

引用次数: 99

On robust k-hop clustering in ad-hoc cognitive radio networks 自组织认知无线电网络中稳健k-hop聚类研究

2016 Twenty Second National Conference on Communication (NCC) Pub Date : 2016-03-04 DOI: 10.1109/NCC.2016.7561086

R. Misra, R. Yadav, Vinod Dosapati

{"title":"On robust k-hop clustering in ad-hoc cognitive radio networks","authors":"R. Misra, R. Yadav, Vinod Dosapati","doi":"10.1109/NCC.2016.7561086","DOIUrl":"https://doi.org/10.1109/NCC.2016.7561086","url":null,"abstract":"Cognitive radio networks (CRNs) enable cognitive users (CUs equipped with spectrum sensing) access the underutilized spectrum licensed to primary users (PUs) without causing unacceptable interference to the PUs' activities. On appearance of PUs, the available channel of CUs at different position may have different available channels which changes dynamically over time. Due to temporal and spatial variations of channel availability among CUs poses research challenges for ensuring connectivity and robustness of CRN. Reported works have shown effective use of clustering technique for network connectivity, cooperative spectrum sensing and a coordinated channel switching in CRN. Connectivity within the CRN is guaranteed as long as there is at least one channel available within each cluster and also between neighboring clusters. Most of the existing clustering schemes divide CRN into the least number of clusters based on the available channel common to the largest set of 1-hop neighbors. The drawbacks of these schemes are they do not provide robustness and require frequent re-clustering to maintain connectivity in CRN because of small number of common channel in each cluster. We have proposed a heuristic for k-hop clustering with objective to connect larger set of CUs in CRN. Our proposed algorithm converges in O(n.k), where n is the number of CUs and k is the number of hops. We have evaluated the performance of proposed scheme through simulation and observed that k-hop clustering algorithm achieves 40-50% more common channels as compared to other competitive approaches for k = 1 and improves robustness to 40%.","PeriodicalId":279637,"journal":{"name":"2016 Twenty Second National Conference on Communication (NCC)","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131010512","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

Hardware implementation of quadtree based fractal image decoder 基于四叉树的分形图像解码器的硬件实现

2016 Twenty Second National Conference on Communication (NCC) Pub Date : 2016-03-04 DOI: 10.1109/NCC.2016.7561100

M. Panigrahy, I. Chakrabarti, A. Dhar

引用次数: 1

Computing HRTFs using Spherical Near field Acoustic Holography for rendering spatial audio 利用球面近场声学全息术计算hrtf以呈现空间音频

2016 Twenty Second National Conference on Communication (NCC) Pub Date : 2016-03-04 DOI: 10.1109/NCC.2016.7561105

Ayush Singhal, Sandeep Reddy C, R. Hegde

{"title":"Computing HRTFs using Spherical Near field Acoustic Holography for rendering spatial audio","authors":"Ayush Singhal, Sandeep Reddy C, R. Hegde","doi":"10.1109/NCC.2016.7561105","DOIUrl":"https://doi.org/10.1109/NCC.2016.7561105","url":null,"abstract":"In this paper, a novel method for computing Head Related Transfer Functions (HRTFs) using principles of Spherical Nearfield Acoustic Holography (SNAH) is described. To compute generalized HRTFs the head and the torso have been modeled by spheres of different radii using the snowman model. A new method of sound pressure reconstruction over a spherical surface that utilizes SNAH is proposed for modeling the head. Pressure reconstruction corresponding to all spatial locations of a sound source is performed using motion holography. The torso is modeled by using principles of Gaussian optics within a SNAH framework. A combined head and torso (HAT) model is then developed to obtain HRTFs. Head and Torso response obtained by the proposed approach is compared individually with existing numerical techniques. For low frequencies both approaches provide similar results. Binaural audio is then synthesized using HRTFs computed from the proposed method and from the CIPIC database. Subjective evaluation on binaural audio convey that proposed technique results are comparable to CIPIC in both horizontal and frontal planes.","PeriodicalId":279637,"journal":{"name":"2016 Twenty Second National Conference on Communication (NCC)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128382052","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

Group delay functions for speaker diarization 扬声器拨号组延迟功能

2016 Twenty Second National Conference on Communication (NCC) Pub Date : 2016-03-04 DOI: 10.1109/NCC.2016.7561127

Mohit Yadav, A. Sao, A. D. Dileep, Padmanabhan Rajan

引用次数: 1

Performance analysis of an IEEE 802.11ac WLAN with dynamic bandwidth channel access 具有动态带宽通道接入的IEEE 802.11ac无线局域网性能分析

2016 Twenty Second National Conference on Communication (NCC) Pub Date : 2016-03-04 DOI: 10.1109/NCC.2016.7561142

S. V. Sree Vasthav, S. Srikanth, Venkatesh Ramaiyan

引用次数: 11

Salient keypoint selection for object representation 突出的关键点选择对象表示

2016 Twenty Second National Conference on Communication (NCC) Pub Date : 2016-03-04 DOI: 10.1109/NCC.2016.7561176

Prerana Mukherjee, Siddharth Srivastava, Brejesh Lall

引用次数: 7

Formant filters-based multi-band speech enhancement algorithm for intelligibility improvement 基于形成峰滤波器的多频带语音增强算法

2016 Twenty Second National Conference on Communication (NCC) Pub Date : 2016-03-04 DOI: 10.1109/NCC.2016.7561149

M. P. Actlin Jeeva, T. Nagarajan, P. Vijayalakshmi

{"title":"Formant filters-based multi-band speech enhancement algorithm for intelligibility improvement","authors":"M. P. Actlin Jeeva, T. Nagarajan, P. Vijayalakshmi","doi":"10.1109/NCC.2016.7561149","DOIUrl":"https://doi.org/10.1109/NCC.2016.7561149","url":null,"abstract":"Speech enhancement algorithms in the past concentrated on improving the speech quality, however they need not necessarily improve intelligibility of the enhanced speech. The current work focuses on improving the quality as well as intelligibility of the well-known multi-band spectral subtraction algorithm. In this regard, to improve speech quality, a temporal-domain filtering-based approach is proposed to obtain sub-bands (ERB-based). To improve intelligibility, it is necessary to identify the type of distortion (attenuation or amplification distortion) that affects the intelligibility of enhanced speech. Therefore, an analysis is performed on the enhanced speech at the phoneme level using segmental-SNR and it is observed that in high SNR regions of the noisy speech (specifically in vowels, liquids, nasals), intelligibility is reduced due to amplification distortion. This may be due to the high spectral resolution of the temporal-domain ERB-based filters. Hence, to improve intelligibility, a set of formant specific filters are proposed based on the formant analysis carried out over vowels, liquids and nasals. The performance of the proposed multi-band spectral subtraction algorithm is evaluated for its quality and intelligibility, using subjective (MOS) and objective (PESQ and CSII) measures, for the speech affected by white, car and babble noise at -5 to 15 dB SNR levels. It is observed that the proposed method improves speech quality and intelligibility by around 0.1-0.5 in terms of PESQ and 2-10% in terms of CSII over conventional multi-band spectral subtraction method.","PeriodicalId":279637,"journal":{"name":"2016 Twenty Second National Conference on Communication (NCC)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132048977","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

A SSRR based multiband antenna for mobile phone 一种基于SSRR的手机多波段天线

2016 Twenty Second National Conference on Communication (NCC) Pub Date : 2016-03-04 DOI: 10.1109/NCC.2016.7561202

A. Gangwar, M. Alam

引用次数: 10