2019 National Conference on Communications (NCC)最新文献_第2页

Slot Antenna Miniaturization Using Copper Coated Circular Dielectric Material 利用镀铜圆形介电材料实现槽形天线小型化

2019 National Conference on Communications (NCC) Pub Date : 2019-02-01 DOI: 10.1109/NCC.2019.8732182

Enamul Khan, Jinia Aktar, K. Parvez, S. M. Haque

引用次数: 4

[Copyright notice] (版权)

2019 National Conference on Communications (NCC) Pub Date : 2019-02-01 DOI: 10.1109/ncc.2019.8732221

引用次数: 0

Top-m Clustering with a Noisy Oracle 基于噪声Oracle的Top-m聚类

2019 National Conference on Communications (NCC) Pub Date : 2019-02-01 DOI: 10.1109/NCC.2019.8732224

Tuhinangshu Choudhury, Dhruti Shah, N. Karamchandani

引用次数: 4

Instantaneous Frequency Features for Noise Robust Speech Recognition 噪声鲁棒语音识别的瞬时频率特征

2019 National Conference on Communications (NCC) Pub Date : 2019-02-01 DOI: 10.1109/NCC.2019.8732216

Shekhar Nayak, D. Shashank, Saurabhchand Bhati, Koilakuntla Bramhendra, K. Murty

{"title":"Instantaneous Frequency Features for Noise Robust Speech Recognition","authors":"Shekhar Nayak, D. Shashank, Saurabhchand Bhati, Koilakuntla Bramhendra, K. Murty","doi":"10.1109/NCC.2019.8732216","DOIUrl":"https://doi.org/10.1109/NCC.2019.8732216","url":null,"abstract":"Analytic phase of the speech signal plays an important role in human speech perception, specially in the presence of noise. Generally, phase information is ignored in most of the recent speech recognition systems. In this paper, we illustrate the importance of analytic phase of the speech signal for noise robust automatic speech recognition. To avoid phase wrapping problem involved in the computation of analytic phase, features are extracted from instantaneous frequency (IF) which is time derivative of analytic phase. Deep neural network (DNN) based acoustic models are trained on clean speech using features extracted from the IF of speech signals. Robustness of IF features in combination with mel-frequency cepstral coefficients (MFCCs) was evaluated in varied noisy conditions. System combination using minimum Bayes risk decoding of IF features with MFCCs delivered absolute improvements of upto 13% over MFCC features alone for DNN based systems under noisy conditions. The impact of the system combination of magnitude and phase based features on different phonetic classes was studied under noisy conditions and was found to model both voiced and unvoiced phonetic classes efficiently.","PeriodicalId":6870,"journal":{"name":"2019 National Conference on Communications (NCC)","volume":"45 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2019-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88416301","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

A Planar Four-Port Integrated UWB and NB Antenna System for CR in 3.1GHz to 10.6GHz 一种用于3.1GHz ~ 10.6GHz CR的平面四端口UWB和NB集成天线系统

2019 National Conference on Communications (NCC) Pub Date : 2019-02-01 DOI: 10.1109/NCC.2019.8732177

A. Gandhi, Anveshkumar Nella

{"title":"A Planar Four-Port Integrated UWB and NB Antenna System for CR in 3.1GHz to 10.6GHz","authors":"A. Gandhi, Anveshkumar Nella","doi":"10.1109/NCC.2019.8732177","DOIUrl":"https://doi.org/10.1109/NCC.2019.8732177","url":null,"abstract":"This paper is aimed to present a planar four-port integrated UWB and narrowband (NB) antenna system for cognitive radio (CR) technology in the UWB 3.1GHz to 10.6GHz. This system consists of a UWB antenna for spectrum monitoring and three NB antennas for communication. These ultra wideband and narrowband antennas are incorporated on an FR-4 substrate having dimensions $pmb{28}mathbf{mm}pmb{times31}mathbf{mm}pmb{times1.6}mathbf{mm}$, The ultra wideband antenna, attached to port 1, is capable of monitoring the complete FCC unlicensed UWB spectrum 3.1GHz to 10.6GHz. The three NB antennas accomplish either single or dual bands to access the complete 3.1GHz to 10.6GHz band for communication. In particular, the first narrowband antenna, linked at port 2, attains a single band ranging from 8.26GHz to 11.16GHz. The second narrowband antenna, allied at port 3, also yields a single operating band ranges from 4.29GHz to 6GHz. The third NB antenna, associated with port 4, achieves a dual band behaviour starting from 3.06GHz to 4.49GHz and 5.97GHz to 8.35GHz. The coupling between the antennas is less than -17dB across the complete UWB. The proposed antenna system is fabricated and tested. It is observed that there is a good agreement between the simulated and measured results.","PeriodicalId":6870,"journal":{"name":"2019 National Conference on Communications (NCC)","volume":"116 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2019-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83874084","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

Quantum Random Number Generator with One and Two Entropy Sources 具有一个和两个熵源的量子随机数发生器

2019 National Conference on Communications (NCC) Pub Date : 2019-02-01 DOI: 10.1109/NCC.2019.8732222

G. Shaw, S. Sivaram, A. Prabhakar

引用次数: 2

Interference Violation Probability Constrained Underlay Cognitive Massive MIMO Network Under Imperfect Channel Knowledge 不完全信道知识下受干扰干扰概率约束的底层认知海量MIMO网络

2019 National Conference on Communications (NCC) Pub Date : 2019-02-01 DOI: 10.1109/NCC.2019.8732203

Rama Gupta, Salil Kashyap, E. V. Pothan

{"title":"Interference Violation Probability Constrained Underlay Cognitive Massive MIMO Network Under Imperfect Channel Knowledge","authors":"Rama Gupta, Salil Kashyap, E. V. Pothan","doi":"10.1109/NCC.2019.8732203","DOIUrl":"https://doi.org/10.1109/NCC.2019.8732203","url":null,"abstract":"We investigate the use of massive number of antennas at the cognitive base station (BS) in reducing interference caused to primary users (PUs) under imperfect channel knowledge without deteriorating the data rate provided to the cognitive user (CU). To this end, we develop a simple back-off factor based power adaptation policy for the cognitive BS which ensures that its transmissions do not violate the interference violation probability constraint at the PUs. We derive a new lower bound on the complement of the interference violation probability and also deduce a lower bound on the achievable rate of the CU when the cognitive BS has an imperfect estimate of its channels to the PUs and the CU. Through our analytical and numerical results, we quantify that the interference violation probability at the PUs can be reduced while providing a fixed data rate to the CU by deploying more number of cognitive BS antennas. Furthermore, if the number of PUs in the network increase, we show that the interference violation probability at the PUs and the data rate of the CU can be maintained at the same level by increasing the number of antennas at the cognitive BS.","PeriodicalId":6870,"journal":{"name":"2019 National Conference on Communications (NCC)","volume":"39 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2019-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77945920","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

Performance Analysis of BCH and Repetition Codes in Gamma-Gamma Faded FSO Link 伽玛-伽玛衰落FSO链路中BCH和重复码的性能分析

2019 National Conference on Communications (NCC) Pub Date : 2019-02-01 DOI: 10.1109/NCC.2019.8732226

Sonali, N. Gupta, A. Dixit, V. Jain

{"title":"Performance Analysis of BCH and Repetition Codes in Gamma-Gamma Faded FSO Link","authors":"Sonali, N. Gupta, A. Dixit, V. Jain","doi":"10.1109/NCC.2019.8732226","DOIUrl":"https://doi.org/10.1109/NCC.2019.8732226","url":null,"abstract":"In this research paper, we have analyzed free space optical (FSO) link performance for intensity modulated/direct detection system. FSO communication link is key to the next generation 5G/10G wireless networks. Generally, FSO link performance is impaired by atmospheric turbulence. Utilizing error correcting codes (ECCs) is one of the mitigation techniques employed to reduce the impact of atmospheric turbulence. We explore Bose-Chaudhuri-Hocquenghem (BCH) and repetition codes for mitigating the effects caused by atmospheric turbulence. We have made the performance comparison in terms of bit error rate (BER) under different turbulence regimes, viz., low, moderate and high regime for both uncoded and coded systems. We evaluate the analytical results and validate them with the simulations. It is concluded that BCH coded system performance is always better than the repetition coded system in all the turbulence regimes. BCH coded system provide a coding gain of 23.4 dB at a high turbulence level which reduces to 17.5 dB and 5 dB at moderate and low turbulence regimes, respectively. However, when we combine the benefits of both the coding schemes, the performance improvement obtained is much higher when compared with both the codes individually. It is, of course, at the cost of an increase in transmission bandwidth requirement.","PeriodicalId":6870,"journal":{"name":"2019 National Conference on Communications (NCC)","volume":"5 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2019-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76065210","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

Development of an Efficient Low-complexity Channel Estimator for Digital Television Terrestrial Broadcasting Systems 数字电视地面广播系统中高效低复杂度信道估计器的研制

2019 National Conference on Communications (NCC) Pub Date : 2019-02-01 DOI: 10.1109/NCC.2019.8732194

Ghanshyamkumar Sah, P. M. Pradhan

{"title":"Development of an Efficient Low-complexity Channel Estimator for Digital Television Terrestrial Broadcasting Systems","authors":"Ghanshyamkumar Sah, P. M. Pradhan","doi":"10.1109/NCC.2019.8732194","DOIUrl":"https://doi.org/10.1109/NCC.2019.8732194","url":null,"abstract":"Orthogonal frequency division multiplexing (OFDM) is widely used to transmit data in many wireless communication applications including digital television terrestrial broadcasting (DTTB). Although the existing dual pseudo noise padding (DPNP) based time-domain synchronous OFDM (TDS-OFDM) system has low complexity, the spectral efficiency is low. The time-frequency-domain (TFD) based frame structure enhances the system performance of TDS-OFDM over fast time-varying channels by compromising with computational complexity. This paper proposes a novel frame structure for OFDM-based DTTB system which incorporates pilots in the time domain, and retains the cyclic prefix and modulable orthogonal sequence (MOS) from the TFD-based frame structure. Since the proposed frame structure is completely defined in time domain, channel estimation and equalization become easier. Using the new frame structure, a novel channel estimation technique is proposed that works in two stages. In the first stage, the MOS in guard interval is used to estimate the channel delay and gain. In the second stage, the channel gains estimated in first stage are fine-tuned using adaptive algorithms such as least mean square (LMS) or recursive least squares algorithm. The bit-error-rate (BER) performance of the proposed two-stage channel estimation technique is better compared to that of DPNP-based TDS-OFDM. In addition, computational complexity of the proposed LMS-based two-stage channel estimation approach is low compared to TFD-based TDS-OFDM system. Less than 1.5% of the total sub-carriers are used as redundant pilots, and therefore the loss in spectral efficiency is negligible in the proposed approach.","PeriodicalId":6870,"journal":{"name":"2019 National Conference on Communications (NCC)","volume":"105 1 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2019-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74836124","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 Mid-Haul Characteristics for LTE-NR Multi-Connectivity in Heterogeneous Cloud RAN 异构云RAN中LTE-NR多连接中程特性分析

2019 National Conference on Communications (NCC) Pub Date : 2019-02-01 DOI: 10.1109/NCC.2019.8732223

S. Ramakrishnan, Subrat Kar, S. Dharmaraja

{"title":"Analysis of Mid-Haul Characteristics for LTE-NR Multi-Connectivity in Heterogeneous Cloud RAN","authors":"S. Ramakrishnan, Subrat Kar, S. Dharmaraja","doi":"10.1109/NCC.2019.8732223","DOIUrl":"https://doi.org/10.1109/NCC.2019.8732223","url":null,"abstract":"To address the capacity requirements resulting from huge growth in mobile data traffic, the mobile network operators (MNOs) are deploying heterogeneous Cloud based Radio Access Network (C-RAN) with a mix of Base stations viz. 4G Macro Base stations (offering better coverage) and 5G Small cells (offering better radio capacities). With LTE-NR Multi-Connectivity feature in 5G network, the User Equipments (UEs) can connect with both 4G and 5G simultaneously to take advantage of better coverage and capacity, so that its QoS is met appropriately. To maintain such simultaneous connections (with UE) across different BTS, the network must support stringent high bandwidth and low-latency links (mid-haul links) between the Base station nodes. In a C-RAN environment, the inter Base station mid-haul links can be viewed as inter Virtual Machine (VM) communication link. In this paper, we analyze the characteristics of the mid-haul link for LTE-NR Multi-Connectivity feature (specifically E-UTRAN-NR Dual Connectivity EN-DC configuration) in a heterogeneous C-RAN deployment. We simulate the C-RAN scenario using NS3 network simulator with heterogeneous mix of 4G and 5G-NR Base stations with appropriate cloud architecture split. We use the BTS power model to derive the Computational Requirement (CR) of the Base station for vBBU (virtual Baseband Unit) placement algorithm in C-RAN. Through simulation, we review the bandwidth requirement of the mid-haul link and assess variation in the end-to-end delay when latency of mid-haul link is varied. From available cloud infrastructure hardware bench-mark results, we observe that the latency of inter VM communication links, varies depending on whether the two communicating VMs are on same or different Cloud servers. Thus, we propose “Neighbour Association-aware Placement” (NAP) algorithm for placement of the vBBUs in the same Cloud server and assess the benefits in the case of EN-DC configuration.","PeriodicalId":6870,"journal":{"name":"2019 National Conference on Communications (NCC)","volume":"25 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2019-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74361457","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