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Improving performance of K-SVD based image denoising using curvelet transform 利用曲波变换改进基于K-SVD的图像去噪性能
2015 International Conference on Microwave, Optical and Communication Engineering (ICMOCE) Pub Date : 2015-12-01 DOI: 10.1109/ICMOCE.2015.7489772
Sidheswar Routray, A. Ray, C. Mishra
{"title":"Improving performance of K-SVD based image denoising using curvelet transform","authors":"Sidheswar Routray, A. Ray, C. Mishra","doi":"10.1109/ICMOCE.2015.7489772","DOIUrl":"https://doi.org/10.1109/ICMOCE.2015.7489772","url":null,"abstract":"Image denoising algorithm in transform domain which uses learning of dictionary has better PSNR performance than others. It is seen that the popular algorithms based on K-SVD proposed earlier has still in use. However, the texture part of the image could not be preserved during the process of denoising. It is also seen that the effect becomes more visible with increased value of standard deviation of the Gaussian noise. The proposed algorithm in this work uses curvelet transform along with K-SVD to retain the texture part of the image. The denoising with the proposed method shows better PSNR performance as compared to denoising with only K-SVD.","PeriodicalId":352568,"journal":{"name":"2015 International Conference on Microwave, Optical and Communication Engineering (ICMOCE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129302772","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: 7
Design of a gain flattened doped fiber amplifier with stabilized power output for WDM transmissions 用于WDM传输的具有稳定输出功率的增益平坦化掺杂光纤放大器的设计
2015 International Conference on Microwave, Optical and Communication Engineering (ICMOCE) Pub Date : 2015-12-01 DOI: 10.1109/ICMOCE.2015.7489723
Tony Jose, V. Narayanan
{"title":"Design of a gain flattened doped fiber amplifier with stabilized power output for WDM transmissions","authors":"Tony Jose, V. Narayanan","doi":"10.1109/ICMOCE.2015.7489723","DOIUrl":"https://doi.org/10.1109/ICMOCE.2015.7489723","url":null,"abstract":"The gain spectrum of an Erbium Doped Fiber Amplifier (EDFA) has a peak centered at 1532nm and a broad peak with relatively low gain centered at 1550nm. In many applications like soliton based systems which makes use of EDFA repeaters and Dense Wavelength Division Multiplexing (DWDM) systems where EDFA is used for amplifying a large number of wavelengths, gain fluctuations in EDFA has to be confined within specified limits over a wide span of wavelengths. Many methods of gain stabilization in EDFA has already been proposed in the recent past. In our work, we propose a novel method for gain contouring and output power stabilization in Erbium Doped Fiber Amplifiers. The amplifier with gain control is designed and simulated. The flattening of gain spectrum of EDFA is achieved by photonic switching using Optical Add Drop Multiplexers (OADM) and Fiber Bragg Gratings (FBG). The stabilization of gain and output power of EDFA is also experimentally verified. In the proposed feedforward technique, the output power stabilization is achieved by proper selection of modulator parameters.","PeriodicalId":352568,"journal":{"name":"2015 International Conference on Microwave, Optical and Communication Engineering (ICMOCE)","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128787444","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
Design of a compact MIMO antenna with polarization diversity technique for wireless communication 基于极化分集技术的小型无线通信MIMO天线设计
2015 International Conference on Microwave, Optical and Communication Engineering (ICMOCE) Pub Date : 2015-12-01 DOI: 10.1109/ICMOCE.2015.7489681
L. Malviya, Dr. Jagannath Malik, R. K. Panigrahi, M. V. Kartikeyan
{"title":"Design of a compact MIMO antenna with polarization diversity technique for wireless communication","authors":"L. Malviya, Dr. Jagannath Malik, R. K. Panigrahi, M. V. Kartikeyan","doi":"10.1109/ICMOCE.2015.7489681","DOIUrl":"https://doi.org/10.1109/ICMOCE.2015.7489681","url":null,"abstract":"The present wireless communication with MIMO antennas, takes the advantages of high data rate and high capacity and requires dual polarization for the coverage of vertically and horizontally polarized signals. A G shaped polarization diversity MIMO antenna with ground modification techniques and perfect boundary conditions is proposed to resonate at 2.47 GHz for wireless communication. It covers 2.39-2.7126 GHz of common frequency spectrum for WLAN, WIMAX, and LTE bands. The size of the FR4 substrate used for MIMO antenna is 0.58λ × 0.29λ mm2. The proposed design shows less than -23 dB of mutual coupling, peak gain of more than 2.5 dB for each antenna, and common bandwidth of 32.26% respectively.","PeriodicalId":352568,"journal":{"name":"2015 International Conference on Microwave, Optical and Communication Engineering (ICMOCE)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116735766","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: 7
Implementation of GSM channel estimation using open-source SDR environment 利用开源SDR环境实现GSM信道估计
2015 International Conference on Microwave, Optical and Communication Engineering (ICMOCE) Pub Date : 2015-12-01 DOI: 10.1109/ICMOCE.2015.7489757
Abhishek Bhatta, A. Mishra
{"title":"Implementation of GSM channel estimation using open-source SDR environment","authors":"Abhishek Bhatta, A. Mishra","doi":"10.1109/ICMOCE.2015.7489757","DOIUrl":"https://doi.org/10.1109/ICMOCE.2015.7489757","url":null,"abstract":"Channel estimation and equalization is a major area of research and development in communications engineering. However in the open literature there is no elaborate report on how to implement it on real signals from base-stations. In this paper we give the detailed steps to implement channel estimation block on real GSM signals using open-source software defined radio (SDR) environment. This work is expected to help all the researchers trying to implement and test channel equalization algorithms on real signal.","PeriodicalId":352568,"journal":{"name":"2015 International Conference on Microwave, Optical and Communication Engineering (ICMOCE)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116310317","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
Health monitoring systems: An energy efficient data collection technique in wireless sensor networks 健康监测系统:无线传感器网络中的节能数据收集技术
2015 International Conference on Microwave, Optical and Communication Engineering (ICMOCE) Pub Date : 2015-12-01 DOI: 10.1109/ICMOCE.2015.7489707
Nagendra Kumar Mangali, Venkata Krishna Kota
{"title":"Health monitoring systems: An energy efficient data collection technique in wireless sensor networks","authors":"Nagendra Kumar Mangali, Venkata Krishna Kota","doi":"10.1109/ICMOCE.2015.7489707","DOIUrl":"https://doi.org/10.1109/ICMOCE.2015.7489707","url":null,"abstract":"Now a days the wireless sensor networks are using in wide variety of applications. The wireless sensor nodes are battery powered in most of the applications especially in health monitoring systems. Usage of these battery powered wireless sensor nodes with minimal energy consumption is the bottleneck in wireless sensor network based health monitoring systems. Deployment of large number of these battery powered sensor nodes in an environment and maintaining the wireless sensor network for long lifetime is a critical task. The lifetime of wireless sensor networks is increased by using several power saving techniques for data collection and processing. In this work, we present a novel cluster based vital health data collection, processing and routing. The wide wireless sensor network covered by a base station is partitioned into several clusters with cluster head routing data to/from base station. Each cluster consisting of several body area networks with body heads, which are responsible for routing data to/from cluster head. Thus, creation of cluster heads and body heads and assigning special tasks to cluster heads and body heads can greatly contribute to overall system scalability, lifetime, and energy efficiency. With this system architecture, we can greatly minimize the average power consumed by a wireless sensor network.","PeriodicalId":352568,"journal":{"name":"2015 International Conference on Microwave, Optical and Communication Engineering (ICMOCE)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115945741","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
Design and analysis of 2-D hexagonal photonic crystal structure based channel drop filter for CWDM system
2015 International Conference on Microwave, Optical and Communication Engineering (ICMOCE) Pub Date : 2015-12-01 DOI: 10.1109/ICMOCE.2015.7489721
M. Chhipa, Ekta Rewar
{"title":"Design and analysis of 2-D hexagonal photonic crystal structure based channel drop filter for CWDM system","authors":"M. Chhipa, Ekta Rewar","doi":"10.1109/ICMOCE.2015.7489721","DOIUrl":"https://doi.org/10.1109/ICMOCE.2015.7489721","url":null,"abstract":"In this paper, the design & analysis of two dimensional (2-D) photonic crystal structure based channel drop filter is investigated using photonic crystal ring resonator. In this paper, Photonic Crystal (PhC) based on hexagonal lattice periodic arrays of Gallium Arsenide (GaAs) rods in air structure have been investigated using Finite Difference Time Domain (FDTD) method and photonic band gap is being calculated using Plane Wave Expansion (PWE) method. The PhC designs have been optimized for telecommunication wavelength λ= 1511 nm. The number of rods in X and Z directions are 19 and 23, with lattice constant 0.540 nm it illustrates that the arrangement of Gallium Arsenide (GaAs) rods in the structure which gives the overall size of the device around 10.26 μm × 12.42 μm. The designed filter gives good dropping efficiency using 3.40, refractive index. The designed structure is useful for CWDM systems. This device may serve as a key component in photonic integrated circuits, optical communication networks and metro applications. The device is ultra compact with the overall size around 127 μm2.","PeriodicalId":352568,"journal":{"name":"2015 International Conference on Microwave, Optical and Communication Engineering (ICMOCE)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128440152","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
2×2 MIMO antenna at 2.4 GHz for WLAN applications 2×2 2.4 GHz MIMO天线，用于WLAN应用
2015 International Conference on Microwave, Optical and Communication Engineering (ICMOCE) Pub Date : 2015-12-01 DOI: 10.1109/ICMOCE.2015.7489695
R. Anuvind, S. Joseph, A. Kothari
{"title":"2×2 MIMO antenna at 2.4 GHz for WLAN applications","authors":"R. Anuvind, S. Joseph, A. Kothari","doi":"10.1109/ICMOCE.2015.7489695","DOIUrl":"https://doi.org/10.1109/ICMOCE.2015.7489695","url":null,"abstract":"Multiple Input Multiple Output (MIMO) techniques have merged as a key technology for the next generation wireless communication systems because they enable very high data rate transmission. Unlike the Single Input Single Output (SISO) systems MIMO systems enhance the capacity and data rate of wireless transmission. In MIMO multiple antennas are used at the transmitter and receiver sections. This paper discusses the design and simulation of a two-element MIMO antenna which can be used for WLAN applications. The MIMO antenna system consists of two radiating elements on a single low-cost FR4 substrate with a thickness of 1.6mm. The proposed antenna operates at 2.4 GHz. The bandwidth of the antenna is 60MHz, which extends from 2.38GHz to 2.47 GHz which is suitable for WLAN operations. The distance between the two antenna elements is 3mm (0.05λ). The gain of the designed antenna is around 7dB. Defected Ground Structure (DGS) has been added on the ground plane of the antenna to enhance isolation between the two radiating elements. Isolation between the two radiating elements could be decreased upto -20dB from -13 dB with the use of defected ground structure. The design and simulation has been carried out in ANSOFT HFSS software. Antenna has been fabricated and testing for return loss was performed using Agilent N5230A Network Analyzer.","PeriodicalId":352568,"journal":{"name":"2015 International Conference on Microwave, Optical and Communication Engineering (ICMOCE)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127302804","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: 7
Overlapped segmental Active Constellation Extension for the PAPR reduction of the OFDM/OQAM system 降低OFDM/OQAM系统PAPR的重叠分段主动星座扩展
2015 International Conference on Microwave, Optical and Communication Engineering (ICMOCE) Pub Date : 2015-12-01 DOI: 10.5815/IJISA.2016.04.03
Sandeepkumar Vangala, S. Anuradha
{"title":"Overlapped segmental Active Constellation Extension for the PAPR reduction of the OFDM/OQAM system","authors":"Sandeepkumar Vangala, S. Anuradha","doi":"10.5815/IJISA.2016.04.03","DOIUrl":"https://doi.org/10.5815/IJISA.2016.04.03","url":null,"abstract":"Orthogonal frequency division multiplexing with Offset Quadrature Amplitude Modulation (OFDM-OQAM) technique has drawn significant interests in recent years. However, most of the existing OFDM peak-to-average ratio (PAPR) reduction schemes cannot be used in the OFDM-OQAM system directly. In this paper, a modified scheme called overlapped segmental Active Constellation Extension (OS-ACE) is proposed to deal with the high PAPR problem specifically in the OFDM-OQAM system. For the proposed OS-ACE scheme, the input signals are divided into a number of overlapped segments and then the ACE operation is processed on each segment. Simulation results show that the modified scheme used in the OFDM-OQAM system can provide better performance than conventional ACE scheme directly used in the OFDM-OQAM system, and even outperforms conventional ACE scheme applied in the OFDM system.","PeriodicalId":352568,"journal":{"name":"2015 International Conference on Microwave, Optical and Communication Engineering (ICMOCE)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134163551","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: 7
Low complex primary and secondary synchronization signal structure design for LTE systems LTE系统低复杂度主次同步信号结构设计
2015 International Conference on Microwave, Optical and Communication Engineering (ICMOCE) Pub Date : 2015-12-01 DOI: 10.1109/ICMOCE.2015.7489794
B. Shoba, K. Jayanthi
{"title":"Low complex primary and secondary synchronization signal structure design for LTE systems","authors":"B. Shoba, K. Jayanthi","doi":"10.1109/ICMOCE.2015.7489794","DOIUrl":"https://doi.org/10.1109/ICMOCE.2015.7489794","url":null,"abstract":"This electronic Synchronization plays a vital role in enhancing the overall performance of the LTE system. In this paper, both Primary Synchronization Signal (PSS) and Secondary Synchronization Signal (SSS) are considered and an attempt is taken to modify their structures to reduce the computational complexity and time. In PSS, it is spotlight to reduce the computational time by dividing the Zadoff-chu (ZC) sequence into four segments instead of using the ZC sequence as such as in conventional systems. In SSS, a modified signal structure to reduce the computational time is proposed. The performance of proposed PSS and SSS structures is compared with existing approaches of LTE system.","PeriodicalId":352568,"journal":{"name":"2015 International Conference on Microwave, Optical and Communication Engineering (ICMOCE)","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131069642","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
Tunable SU-8 waveguide grating filter using electrostatic actuation for DWDM optical network 采用静电驱动的可调谐SU-8波导光栅滤波器用于DWDM光网络
2015 International Conference on Microwave, Optical and Communication Engineering (ICMOCE) Pub Date : 2015-12-01 DOI: 10.1109/ICMOCE.2015.7489688
U. P. Lakshmi, M. Balasubramanian, K. Narayan, P. Pattnaik
{"title":"Tunable SU-8 waveguide grating filter using electrostatic actuation for DWDM optical network","authors":"U. P. Lakshmi, M. Balasubramanian, K. Narayan, P. Pattnaik","doi":"10.1109/ICMOCE.2015.7489688","DOIUrl":"https://doi.org/10.1109/ICMOCE.2015.7489688","url":null,"abstract":"In this paper we have designed and simulated a novel tunable filter for DWDM optical network utilizing Bragg wavelength shift of SU-8 waveguide grating located on an electrostatically actuated micromachined cantilever beam. The proposed structure consists of a waveguide Bragg grating located on the cantilever beam. When the beam deflects due to an applied electrostatic force, strain is introduced in the beam and hence the grating period changes giving rise to shift in the Bragg wavelength. Since Bragg gratings acts like filter in transmission spectrum we can achieve tunable filter by applying varying voltages to the cantilever beam. For the chosen dimensions The Full Width Half Maximum (FWHM) achievable was 0.89 nm. We have achieved Bragg wavelength shift of 8.7 nm at 1557.58 nm for 19.5 V actuation providing tuning for 12 DWDM channels.","PeriodicalId":352568,"journal":{"name":"2015 International Conference on Microwave, Optical and Communication Engineering (ICMOCE)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123943475","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
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