Pub Date : 2015-12-01DOI: 10.1109/RAECS.2015.7453281
Aditi Srivastava, B. Pratap
Nonlinear robust observers for the ball and beam system are presented in this paper. Ball and beam control system is a class of nonlinear system which is used to balance a ball on a particular position on the beam. In the designing, Lyapunov theory is used for the stability analysis of the overall system and all the error signals are uniformly bounded. Proposed observers comprise of reduced order and full order robust observers. The presented methodology is easy in implementation. The simulation results demonstrate the important features and satisfactory tracking performance of the proposed observer design approach. Comparison between reduced and full order robust observers is also depicted in this paper.
{"title":"Nonlinear robust observers for ball and beam system: A comparative analysis","authors":"Aditi Srivastava, B. Pratap","doi":"10.1109/RAECS.2015.7453281","DOIUrl":"https://doi.org/10.1109/RAECS.2015.7453281","url":null,"abstract":"Nonlinear robust observers for the ball and beam system are presented in this paper. Ball and beam control system is a class of nonlinear system which is used to balance a ball on a particular position on the beam. In the designing, Lyapunov theory is used for the stability analysis of the overall system and all the error signals are uniformly bounded. Proposed observers comprise of reduced order and full order robust observers. The presented methodology is easy in implementation. The simulation results demonstrate the important features and satisfactory tracking performance of the proposed observer design approach. Comparison between reduced and full order robust observers is also depicted in this paper.","PeriodicalId":256314,"journal":{"name":"2015 2nd International Conference on Recent Advances in Engineering & Computational Sciences (RAECS)","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":"129761846","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}
Pub Date : 2015-12-01DOI: 10.1109/RAECS.2015.7453357
Harsimran Singh, Vishal Gupta
This paper presents recent advances in the in the area of Word Sense Disambiguation (WSD). While the supervised machine learning techniques have proven to be most efficient with the problem of availability of sense tagged data. While describing a few important techniques the paper then represents a comparative analysis among them. There is very less commonality among the data sets which have been used but it has been found out that the Genetic Algorithm based approach has the capability to beat other milestone techniques in the literature.
{"title":"Performance analysis of recent Word Sense Disambiguation techniques","authors":"Harsimran Singh, Vishal Gupta","doi":"10.1109/RAECS.2015.7453357","DOIUrl":"https://doi.org/10.1109/RAECS.2015.7453357","url":null,"abstract":"This paper presents recent advances in the in the area of Word Sense Disambiguation (WSD). While the supervised machine learning techniques have proven to be most efficient with the problem of availability of sense tagged data. While describing a few important techniques the paper then represents a comparative analysis among them. There is very less commonality among the data sets which have been used but it has been found out that the Genetic Algorithm based approach has the capability to beat other milestone techniques in the literature.","PeriodicalId":256314,"journal":{"name":"2015 2nd International Conference on Recent Advances in Engineering & Computational Sciences (RAECS)","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":"130319449","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}
Pub Date : 2015-12-01DOI: 10.1109/RAECS.2015.7453373
Bhim Singh, A. Mishra
In this paper, the topology of a single switch, single input and dual output SEPIC (Single Ended Primary Inductance Converter) is utilized for proposed SPV (Solar Photovoltaic) based water pumping system employing SRM (Switched Reluctance Motor). The proposed DC-DC converter has advantages of conventional SEPIC including capability to provide the efficient voltage balancing of DC link capacitors of a mid-point converter of SRM. Therefore, it eliminates the need of extra efforts to balance the DC link voltage across DC link capacitors and makes the proposed water pumping system cost effective and simple. A unique approach of variable DC link operation of SRM drive with an electronic commutation for switches of a mid-point converter is used with the elimination of current sensors at motor side which results in reduction in cost and losses of the system. The characteristic of providing dual output voltages with no polarity reversal and having features like minimal active components and low noise operation makes proposed dual output SEPIC suitable for solar water pumping using SRM drive. For increasing the efficiency of pumping system, an incremental conductance (InC) based MPPT technique is used to feed a SRM drive.
{"title":"SPV array fed SRM driven water pumping system utilizing dual output SEPIC converter","authors":"Bhim Singh, A. Mishra","doi":"10.1109/RAECS.2015.7453373","DOIUrl":"https://doi.org/10.1109/RAECS.2015.7453373","url":null,"abstract":"In this paper, the topology of a single switch, single input and dual output SEPIC (Single Ended Primary Inductance Converter) is utilized for proposed SPV (Solar Photovoltaic) based water pumping system employing SRM (Switched Reluctance Motor). The proposed DC-DC converter has advantages of conventional SEPIC including capability to provide the efficient voltage balancing of DC link capacitors of a mid-point converter of SRM. Therefore, it eliminates the need of extra efforts to balance the DC link voltage across DC link capacitors and makes the proposed water pumping system cost effective and simple. A unique approach of variable DC link operation of SRM drive with an electronic commutation for switches of a mid-point converter is used with the elimination of current sensors at motor side which results in reduction in cost and losses of the system. The characteristic of providing dual output voltages with no polarity reversal and having features like minimal active components and low noise operation makes proposed dual output SEPIC suitable for solar water pumping using SRM drive. For increasing the efficiency of pumping system, an incremental conductance (InC) based MPPT technique is used to feed a SRM drive.","PeriodicalId":256314,"journal":{"name":"2015 2nd International Conference on Recent Advances in Engineering & Computational Sciences (RAECS)","volume":"21 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":"125697617","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}
Pub Date : 2015-12-01DOI: 10.1109/RAECS.2015.7453343
Tarunpreet Kaur, Dilip Kumar
This paper presents a modern approach for surveillance at remote and border areas using multifunctional robot based on current 3G technology used in defence and military applications. This robotic vehicle has ability to substitute the solider at border areas to provide surveillance. The robotic vehicle works both as autonomous and manually controlled vehicle using internet as communication medium. This multisensory robot used to detect human, bombs, harmful gases and fire at remote and war field areas. Conventionally, wireless security robot obsoletes due to limited frequency range and limited manual control. These limitations are surmounted by using 3G technology which has limitless range. This system also enhances the use of renewable resource of energy by equipping with solar panel. An autonomous operation is controlled by ultrasonic sensor and infrared sensors. Manual operation is controlled by DTMF decoder and cell phones used as video camera by initializing 3G video call and change the path of robot according to real time information of surrounding. This paper also illustrates the experimental results of tilt angle selection of solar panel and power consumption in automatic and manual mode. This robotic vehicle is designed for reconnaissance as well as surveillance under certain circumstances.
{"title":"Wireless multifunctional robot for military applications","authors":"Tarunpreet Kaur, Dilip Kumar","doi":"10.1109/RAECS.2015.7453343","DOIUrl":"https://doi.org/10.1109/RAECS.2015.7453343","url":null,"abstract":"This paper presents a modern approach for surveillance at remote and border areas using multifunctional robot based on current 3G technology used in defence and military applications. This robotic vehicle has ability to substitute the solider at border areas to provide surveillance. The robotic vehicle works both as autonomous and manually controlled vehicle using internet as communication medium. This multisensory robot used to detect human, bombs, harmful gases and fire at remote and war field areas. Conventionally, wireless security robot obsoletes due to limited frequency range and limited manual control. These limitations are surmounted by using 3G technology which has limitless range. This system also enhances the use of renewable resource of energy by equipping with solar panel. An autonomous operation is controlled by ultrasonic sensor and infrared sensors. Manual operation is controlled by DTMF decoder and cell phones used as video camera by initializing 3G video call and change the path of robot according to real time information of surrounding. This paper also illustrates the experimental results of tilt angle selection of solar panel and power consumption in automatic and manual mode. This robotic vehicle is designed for reconnaissance as well as surveillance under certain circumstances.","PeriodicalId":256314,"journal":{"name":"2015 2nd International Conference on Recent Advances in Engineering & Computational Sciences (RAECS)","volume":"163 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":"127625258","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}
Pub Date : 2015-12-01DOI: 10.1109/RAECS.2015.7453351
Harish Pulluri, R. Naresh, Veena Sharma, Preeti
This paper presents a novel meta-heuristic algorithm called colliding bodies optimization (CBO) method to solve the optimal power flow (OPF) problems with non-smooth cost functions. It is based on the one-dimensional collision between two agents. Each agent in the search space is considered as an object or body and measured their performances with masses and velocities and the collision leads to move the objects with new velocities towards better positions. The performance of the proposed method is demonstrated on standard 9-bus and 26-bus systems with different objective functions that reflect the minimization of fuel cost, fuel cost minimization with voltage profile improvement and minimization of transmission loss. Based on comparison of the simulation results, it is confirmed that the proposed method is an alternative approach to tackle the OPF problems.
{"title":"Solving non-convex and non-linear optimal power flow problems using colliding bodies optimization","authors":"Harish Pulluri, R. Naresh, Veena Sharma, Preeti","doi":"10.1109/RAECS.2015.7453351","DOIUrl":"https://doi.org/10.1109/RAECS.2015.7453351","url":null,"abstract":"This paper presents a novel meta-heuristic algorithm called colliding bodies optimization (CBO) method to solve the optimal power flow (OPF) problems with non-smooth cost functions. It is based on the one-dimensional collision between two agents. Each agent in the search space is considered as an object or body and measured their performances with masses and velocities and the collision leads to move the objects with new velocities towards better positions. The performance of the proposed method is demonstrated on standard 9-bus and 26-bus systems with different objective functions that reflect the minimization of fuel cost, fuel cost minimization with voltage profile improvement and minimization of transmission loss. Based on comparison of the simulation results, it is confirmed that the proposed method is an alternative approach to tackle the OPF problems.","PeriodicalId":256314,"journal":{"name":"2015 2nd International Conference on Recent Advances in Engineering & Computational Sciences (RAECS)","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":"130810324","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}
Pub Date : 2015-12-01DOI: 10.1109/RAECS.2015.7453310
N. Mittal, Kulwinderpreet, B. S. Sohi, Urvinder Singh
Data gathering is a common but critical operation in many applications of wireless sensor networks (WSNs). Innovative techniques that improve Energy efficiency to prolong the network lifetime are highly required. The lifetime of a sensor system is the time during which it gathers information from all the sensors to the base station (BS). Given the location of sensors, BS and the available energy at each sensor, there is a requirement of an efficient manner in which the data should be collected from all the sensors and transmitted to BS, such that the system lifetime is maximized. In this paper, the researchers investigated a mobility based application specific low power routing (M-ASLPR) protocol for mobile WSNs (MWSNs). In this protocol, a sensor node gets elected as CH depending upon some parameters like residual energy, mobility and connection time etc. Simulation results show that the performance of M-ASLPR protocol is varied in terms of network lifetime according to the dynamic node densities and speed. The network lifetime gets affected on increasing the number of mobile nodes and speed which is due to high traffic in the network as mobile nodes interfere with each other.
{"title":"Mobility based application specific low power routing protocol for wireless sensor networks","authors":"N. Mittal, Kulwinderpreet, B. S. Sohi, Urvinder Singh","doi":"10.1109/RAECS.2015.7453310","DOIUrl":"https://doi.org/10.1109/RAECS.2015.7453310","url":null,"abstract":"Data gathering is a common but critical operation in many applications of wireless sensor networks (WSNs). Innovative techniques that improve Energy efficiency to prolong the network lifetime are highly required. The lifetime of a sensor system is the time during which it gathers information from all the sensors to the base station (BS). Given the location of sensors, BS and the available energy at each sensor, there is a requirement of an efficient manner in which the data should be collected from all the sensors and transmitted to BS, such that the system lifetime is maximized. In this paper, the researchers investigated a mobility based application specific low power routing (M-ASLPR) protocol for mobile WSNs (MWSNs). In this protocol, a sensor node gets elected as CH depending upon some parameters like residual energy, mobility and connection time etc. Simulation results show that the performance of M-ASLPR protocol is varied in terms of network lifetime according to the dynamic node densities and speed. The network lifetime gets affected on increasing the number of mobile nodes and speed which is due to high traffic in the network as mobile nodes interfere with each other.","PeriodicalId":256314,"journal":{"name":"2015 2nd International Conference on Recent Advances in Engineering & Computational Sciences (RAECS)","volume":"23 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":"133926649","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}
Pub Date : 2015-12-01DOI: 10.1109/RAECS.2015.7453276
Ruchika Sharma, Harbinder Singh
Left Handed Metamaterial are the artificial material having negative value of refractive index thus following left hand property. Miniaturization is one of the best advantages offered by metamaterial. The paper presents the ideas about the use of metamaterials in innovative antenna designs from an engineering perspective. In the previous work, an eight shaped left handed metamaterial was designed with the help of FR4 substrate having μr = -4 and εr = -2 at 1.8 GHz. Present work includes the use of previously designed structure as a base substrate for rectangular microstrip patch antenna for size minimization and characteristics improvement. The traditionally designed antenna resonates at 1.8 GHz with -12 dB return loss with low cost FR4 as a base substrate on the other hand metamaterial loaded layer antenna resonates at 1.8 GHz with -34 dB return loss. By adding left-handed metamaterial return loss has been improved and the effective volume of the rectangular microstrip patch antenna is also shortened by 71% and 47% reduction was applied to the base substrate of the patch antenna. Line feeding technique is used for the excitation of the proposed antenna. The process of designing and simulation is done using CST Microwave Studio 2010 and MATLAB is used for the retrieval of complex dielectric parameters using NRW (Nicholson Ross-weir) approach. The fundamental parameters of the antenna such as return loss, Bandwidth, gain, radiation pattern are obtained and are compared with the traditionally designed antenna.
{"title":"Left Handed Metamaterial antenna design for GSM 1.8 GHz applications","authors":"Ruchika Sharma, Harbinder Singh","doi":"10.1109/RAECS.2015.7453276","DOIUrl":"https://doi.org/10.1109/RAECS.2015.7453276","url":null,"abstract":"Left Handed Metamaterial are the artificial material having negative value of refractive index thus following left hand property. Miniaturization is one of the best advantages offered by metamaterial. The paper presents the ideas about the use of metamaterials in innovative antenna designs from an engineering perspective. In the previous work, an eight shaped left handed metamaterial was designed with the help of FR4 substrate having μr = -4 and εr = -2 at 1.8 GHz. Present work includes the use of previously designed structure as a base substrate for rectangular microstrip patch antenna for size minimization and characteristics improvement. The traditionally designed antenna resonates at 1.8 GHz with -12 dB return loss with low cost FR4 as a base substrate on the other hand metamaterial loaded layer antenna resonates at 1.8 GHz with -34 dB return loss. By adding left-handed metamaterial return loss has been improved and the effective volume of the rectangular microstrip patch antenna is also shortened by 71% and 47% reduction was applied to the base substrate of the patch antenna. Line feeding technique is used for the excitation of the proposed antenna. The process of designing and simulation is done using CST Microwave Studio 2010 and MATLAB is used for the retrieval of complex dielectric parameters using NRW (Nicholson Ross-weir) approach. The fundamental parameters of the antenna such as return loss, Bandwidth, gain, radiation pattern are obtained and are compared with the traditionally designed antenna.","PeriodicalId":256314,"journal":{"name":"2015 2nd International Conference on Recent Advances in Engineering & Computational Sciences (RAECS)","volume":"105 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":"133341038","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}
Pub Date : 2015-12-01DOI: 10.1109/RAECS.2015.7453342
Bhawna Tandon, S. Narayan, J. Kumar
The paper reports on application of two available numerical solvers-HIFOO and HINFSTRUCT for structured and fixed-order controller design, to a feedback linearized Continuous Stirred tank Reactor (CSTR). These solvers constitute a most practical exploitation of the research in numerical techniques for non-convex non-smooth optimization and results in design of controllers that are easy to implement and fine-tune within a standard infrastructure based on PID. Simulation results are shown to compare these two powerful and useful computational tools.
{"title":"Structured MIMO H∞ design for feedback linearized CSTR based on non-smooth optimization","authors":"Bhawna Tandon, S. Narayan, J. Kumar","doi":"10.1109/RAECS.2015.7453342","DOIUrl":"https://doi.org/10.1109/RAECS.2015.7453342","url":null,"abstract":"The paper reports on application of two available numerical solvers-HIFOO and HINFSTRUCT for structured and fixed-order controller design, to a feedback linearized Continuous Stirred tank Reactor (CSTR). These solvers constitute a most practical exploitation of the research in numerical techniques for non-convex non-smooth optimization and results in design of controllers that are easy to implement and fine-tune within a standard infrastructure based on PID. Simulation results are shown to compare these two powerful and useful computational tools.","PeriodicalId":256314,"journal":{"name":"2015 2nd International Conference on Recent Advances in Engineering & Computational Sciences (RAECS)","volume":"4 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":"132230146","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}
Pub Date : 2015-12-01DOI: 10.1109/RAECS.2015.7453355
Jaipreet Kaur, M. Singh, R. Sohal
In this paper, we combine the benefits of the diversity transmission and forward error correction coding that provides considerable bit error rate performance gain. Alamouti Space Time Block code for 2 transmit antennas with 1 receive antenna and 2 transmit antennas with 2 receive antennas are explored by using BPSK and 16-QAM modulation schemes with Convolution coding. This paper investigates the Bit Error Rate performance comparison between MIMO and Alamouti using 2 transmit antennas and 2 receive antennas over Rayleigh fading channel by using Zero Forcing (ZF) and Minimum Mean Squared Error (MMSE) receivers.
在本文中，我们结合了分集传输和前向纠错编码的优点，提供了相当大的误码率性能增益。采用卷积编码的BPSK和16-QAM调制方案，分别研究了2个发射天线1个接收天线和2个发射天线2个接收天线的Alamouti时空分组编码。采用零强迫(Zero Forcing, ZF)和最小均方误差(Minimum Mean Squared Error, MMSE)接收机，研究了在瑞利衰落信道上使用2个发射天线和2个接收天线的MIMO和Alamouti误码率性能的比较。
{"title":"Performance of Alamouti scheme with convolution for MIMO system","authors":"Jaipreet Kaur, M. Singh, R. Sohal","doi":"10.1109/RAECS.2015.7453355","DOIUrl":"https://doi.org/10.1109/RAECS.2015.7453355","url":null,"abstract":"In this paper, we combine the benefits of the diversity transmission and forward error correction coding that provides considerable bit error rate performance gain. Alamouti Space Time Block code for 2 transmit antennas with 1 receive antenna and 2 transmit antennas with 2 receive antennas are explored by using BPSK and 16-QAM modulation schemes with Convolution coding. This paper investigates the Bit Error Rate performance comparison between MIMO and Alamouti using 2 transmit antennas and 2 receive antennas over Rayleigh fading channel by using Zero Forcing (ZF) and Minimum Mean Squared Error (MMSE) receivers.","PeriodicalId":256314,"journal":{"name":"2015 2nd International Conference on Recent Advances in Engineering & Computational Sciences (RAECS)","volume":"726 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":"116132418","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}
Pub Date : 2015-12-01DOI: 10.1109/RAECS.2015.7453341
S. Attri, Charu Narula, Sanjiv Kumar
Free space optical communication (FSO) is a technique based on transmission of data by propagating the light in free space. FSO is inexpensive, providing high data rates, high capacity, high security, low power and use the license free frequency spectrum. That's why recently FSO is an active area of research. This is an effective technique to transmit the data at high bit rate over short distance. Nevertheless FSO is still facing many problems like bad weather conditions, atmospheric turbulence and multipath fading. Fading is the major challenge faced by FSO. In this paper, we discussed some techniques like coherent detection and OFDM to reduce fading effects and improve the system performance.
{"title":"Techniques to mitigate fading effect in FSO using OFDM","authors":"S. Attri, Charu Narula, Sanjiv Kumar","doi":"10.1109/RAECS.2015.7453341","DOIUrl":"https://doi.org/10.1109/RAECS.2015.7453341","url":null,"abstract":"Free space optical communication (FSO) is a technique based on transmission of data by propagating the light in free space. FSO is inexpensive, providing high data rates, high capacity, high security, low power and use the license free frequency spectrum. That's why recently FSO is an active area of research. This is an effective technique to transmit the data at high bit rate over short distance. Nevertheless FSO is still facing many problems like bad weather conditions, atmospheric turbulence and multipath fading. Fading is the major challenge faced by FSO. In this paper, we discussed some techniques like coherent detection and OFDM to reduce fading effects and improve the system performance.","PeriodicalId":256314,"journal":{"name":"2015 2nd International Conference on Recent Advances in Engineering & Computational Sciences (RAECS)","volume":"88 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":"122085100","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}
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