Pub Date : 2013-12-01DOI: 10.1109/JEC-ECC.2013.6766404
Ayman Mousa, El-Sayed M. El-Rabaie, E. Nigm, O. Faragallah
Chaos in cryptography is of huge interest in many areas such as databases, e-business, and security of communication channels, in order to preserve sensible data from attacks of unauthorized persons. The chaotic maps are becoming increasingly popular in real-time image encryption/ decryption systems for its high security, speed, computational overheads. In this paper we apply two processes: chaotic confusion and diffusion of the pixel values, which provide images cryptosystem of the databases based on chaotic maps. It is implemented by development our database encryption simulation in a previous work done by the authors. This developing conforms by adding chaotic standard and henon map in our simulation. Examining its implementation for image encryption based on chaotic maps along with its detailed performance evaluation and security analysis. Experimental results demonstrate that the image cryptosystem has satisfactory efficient and very secure, which makes it a possible candidate for images encryption in the databases.
{"title":"Images cryptosystem based on chaotic maps for databases security","authors":"Ayman Mousa, El-Sayed M. El-Rabaie, E. Nigm, O. Faragallah","doi":"10.1109/JEC-ECC.2013.6766404","DOIUrl":"https://doi.org/10.1109/JEC-ECC.2013.6766404","url":null,"abstract":"Chaos in cryptography is of huge interest in many areas such as databases, e-business, and security of communication channels, in order to preserve sensible data from attacks of unauthorized persons. The chaotic maps are becoming increasingly popular in real-time image encryption/ decryption systems for its high security, speed, computational overheads. In this paper we apply two processes: chaotic confusion and diffusion of the pixel values, which provide images cryptosystem of the databases based on chaotic maps. It is implemented by development our database encryption simulation in a previous work done by the authors. This developing conforms by adding chaotic standard and henon map in our simulation. Examining its implementation for image encryption based on chaotic maps along with its detailed performance evaluation and security analysis. Experimental results demonstrate that the image cryptosystem has satisfactory efficient and very secure, which makes it a possible candidate for images encryption in the databases.","PeriodicalId":379820,"journal":{"name":"2013 Second International Japan-Egypt Conference on Electronics, Communications and Computers (JEC-ECC)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125811163","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 : 2013-12-01DOI: 10.1109/JEC-ECC.2013.6766380
Dina M. Rashed, M. Sayed, M. Abdalla
Moving object detection is the first step in video-surveillance that aims to detect the moving objects to be classified and tracked. There are many challenges in moving object detection such as lighting changes, dynamic backgrounds, occlusions, and shadows. Many complicated algorithms were proposed in the literature to face these challenges at the cost of increasing the processing time that may deteriorate the performance of the whole surveillance system. SOBS is an efficient algorithm using self-organization approach that was presented in [1] and improved in [2]. In this paper, we introduce a new algorithm based on adaptive background subtraction that has reduced computation complexity, hence, lower processing time while maintaining a competitive performance in terms of the recall and precision parameters. The proposed algorithm construct background model and compares its pixels with the current images to identify foreground/background pixels and minimizes the number of updated pixels in background model to reduce the processing time. The processing time is decreased by 74% compared to the SOBS algorithm. In addition, the proposed algorithm has competitive performance with respect to state-of-the-art algorithms in moving object detection.
{"title":"Improved moving object detection algorithm based on adaptive background subtraction","authors":"Dina M. Rashed, M. Sayed, M. Abdalla","doi":"10.1109/JEC-ECC.2013.6766380","DOIUrl":"https://doi.org/10.1109/JEC-ECC.2013.6766380","url":null,"abstract":"Moving object detection is the first step in video-surveillance that aims to detect the moving objects to be classified and tracked. There are many challenges in moving object detection such as lighting changes, dynamic backgrounds, occlusions, and shadows. Many complicated algorithms were proposed in the literature to face these challenges at the cost of increasing the processing time that may deteriorate the performance of the whole surveillance system. SOBS is an efficient algorithm using self-organization approach that was presented in [1] and improved in [2]. In this paper, we introduce a new algorithm based on adaptive background subtraction that has reduced computation complexity, hence, lower processing time while maintaining a competitive performance in terms of the recall and precision parameters. The proposed algorithm construct background model and compares its pixels with the current images to identify foreground/background pixels and minimizes the number of updated pixels in background model to reduce the processing time. The processing time is decreased by 74% compared to the SOBS algorithm. In addition, the proposed algorithm has competitive performance with respect to state-of-the-art algorithms in moving object detection.","PeriodicalId":379820,"journal":{"name":"2013 Second International Japan-Egypt Conference on Electronics, Communications and Computers (JEC-ECC)","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124050945","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 : 2013-12-01DOI: 10.1109/JEC-ECC.2013.6766385
A. Sallam
The goal is to determine spectral dielectric properties ∈ of a dielectric material (sample) machined to fit X-band rectangular waveguide (WG). Two approaches were utilized to achieve this goal, field approach (FA) and circuit approach (CA) in FA the boundary conditions at interfaces of the rectangular sample were used to address the reflection coefficient Γ at the sample input. In CA the ABCD matrices of WG sections (air-sample-air) were cascaded and transformed to obtain system transmission/reflection properties (scattering matrix[S]), in both FA and CA a deterministic equation roots were scanned using Muller's algorithm. Data fitting is carried using complex nonlinear least square (CNLS). An agreement was noticed for FA and CA at low and mid ranges of WG working band. Teflon and Polystrene results match the publishing data.
{"title":"Comparison of field and circuit analysis for retrieving complex dielectric constant from dielectric material scattering coefficient","authors":"A. Sallam","doi":"10.1109/JEC-ECC.2013.6766385","DOIUrl":"https://doi.org/10.1109/JEC-ECC.2013.6766385","url":null,"abstract":"The goal is to determine spectral dielectric properties ∈ of a dielectric material (sample) machined to fit X-band rectangular waveguide (WG). Two approaches were utilized to achieve this goal, field approach (FA) and circuit approach (CA) in FA the boundary conditions at interfaces of the rectangular sample were used to address the reflection coefficient Γ at the sample input. In CA the ABCD matrices of WG sections (air-sample-air) were cascaded and transformed to obtain system transmission/reflection properties (scattering matrix[S]), in both FA and CA a deterministic equation roots were scanned using Muller's algorithm. Data fitting is carried using complex nonlinear least square (CNLS). An agreement was noticed for FA and CA at low and mid ranges of WG working band. Teflon and Polystrene results match the publishing data.","PeriodicalId":379820,"journal":{"name":"2013 Second International Japan-Egypt Conference on Electronics, Communications and Computers (JEC-ECC)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126918893","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 : 2013-12-01DOI: 10.1109/JEC-ECC.2013.6766378
Suliman A. Boshehba, Ehab Farouk Badran, Mohamed Mahmoud
This paper proposes a modified efficient blind deterministic carrier frequency offset (CFO) estimation method for orthogonal frequency division multiplexing (OFDM) systems. In the proposed method, Four OFDM symbols with time difference are generated by exploiting both the oversampled OFDM signal and the cyclic prefix, and a cost function is introduced for CFO estimation. The cost function is expressed as a cosine function. The estimator of the CFO requires three independent cost function values calculated at three different frequency offsets. Using the formula, the CFO can be estimated without searching all the frequency offset range. The proposed method is very suitable for real wireless environments since it requires only one OFDM symbol for blind reliable estimation of CFO. The computer simulations show that the performance of the proposed modified method is superior to that of the original method.
{"title":"A modified blind deterministic carrier frequency offset estimator for OFDM systems","authors":"Suliman A. Boshehba, Ehab Farouk Badran, Mohamed Mahmoud","doi":"10.1109/JEC-ECC.2013.6766378","DOIUrl":"https://doi.org/10.1109/JEC-ECC.2013.6766378","url":null,"abstract":"This paper proposes a modified efficient blind deterministic carrier frequency offset (CFO) estimation method for orthogonal frequency division multiplexing (OFDM) systems. In the proposed method, Four OFDM symbols with time difference are generated by exploiting both the oversampled OFDM signal and the cyclic prefix, and a cost function is introduced for CFO estimation. The cost function is expressed as a cosine function. The estimator of the CFO requires three independent cost function values calculated at three different frequency offsets. Using the formula, the CFO can be estimated without searching all the frequency offset range. The proposed method is very suitable for real wireless environments since it requires only one OFDM symbol for blind reliable estimation of CFO. The computer simulations show that the performance of the proposed modified method is superior to that of the original method.","PeriodicalId":379820,"journal":{"name":"2013 Second International Japan-Egypt Conference on Electronics, Communications and Computers (JEC-ECC)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125539781","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 : 2013-12-01DOI: 10.1109/JEC-ECC.2013.6766390
M. Mahmoud, A. Wassal
Moore's law still offers more transistors to fit per die unit area and this leads to the expectation of having thousands of cores fit on a single chip soon. Thus, Network-on-Chip proved to be a successful approach to accommodate this increasing number of cores on chip. However, the previously proposed 2D architectures still lack the scalability to more than few tens of cores where the inefficiencies of those architectures come in the form of long interconnect delays leading to performance degradation and high power consumption due to long wires. Fortunately, the rapid advances in 3D die-stacking technology as a promising trend for the state of the art high-performance processor designs raised the possibilities of having new approaches towards a scalable interconnection network. Thus, in this paper, we propose a novel 3D crossbar-based architecture that separates cores from cache modules in different 3D stacked dies.We introduce area model of the adopted crossbar and analyze the scalability of the proposed architecture up to 1024 communicating entities; cores and L2 cache banks.
{"title":"A novel 3D crossbar-based chip multiprocessor architecture","authors":"M. Mahmoud, A. Wassal","doi":"10.1109/JEC-ECC.2013.6766390","DOIUrl":"https://doi.org/10.1109/JEC-ECC.2013.6766390","url":null,"abstract":"Moore's law still offers more transistors to fit per die unit area and this leads to the expectation of having thousands of cores fit on a single chip soon. Thus, Network-on-Chip proved to be a successful approach to accommodate this increasing number of cores on chip. However, the previously proposed 2D architectures still lack the scalability to more than few tens of cores where the inefficiencies of those architectures come in the form of long interconnect delays leading to performance degradation and high power consumption due to long wires. Fortunately, the rapid advances in 3D die-stacking technology as a promising trend for the state of the art high-performance processor designs raised the possibilities of having new approaches towards a scalable interconnection network. Thus, in this paper, we propose a novel 3D crossbar-based architecture that separates cores from cache modules in different 3D stacked dies.We introduce area model of the adopted crossbar and analyze the scalability of the proposed architecture up to 1024 communicating entities; cores and L2 cache banks.","PeriodicalId":379820,"journal":{"name":"2013 Second International Japan-Egypt Conference on Electronics, Communications and Computers (JEC-ECC)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130155798","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 : 2013-12-01DOI: 10.1109/JEC-ECC.2013.6766397
C. Dikmen, S. Cimen, G. Çakir
In this study, an octagonal shaped ultra wide band (UWB) antenna which radiates at 2.5-18 GHz is designed. The designed antenna covering the entire band is assigned for the UWB applications, which is about 150%. The RCS (radar cross section) of the designed antenna is reduced by modifying the physical structure. RCS of the antenna is reduced up to 25 dB. The proposed antenna is fabricated and the experimental results of the radiation performance are in a good agreement with the simulation results.
{"title":"An octagonal shaped ultra wide band antenna with reduced RCS","authors":"C. Dikmen, S. Cimen, G. Çakir","doi":"10.1109/JEC-ECC.2013.6766397","DOIUrl":"https://doi.org/10.1109/JEC-ECC.2013.6766397","url":null,"abstract":"In this study, an octagonal shaped ultra wide band (UWB) antenna which radiates at 2.5-18 GHz is designed. The designed antenna covering the entire band is assigned for the UWB applications, which is about 150%. The RCS (radar cross section) of the designed antenna is reduced by modifying the physical structure. RCS of the antenna is reduced up to 25 dB. The proposed antenna is fabricated and the experimental results of the radiation performance are in a good agreement with the simulation results.","PeriodicalId":379820,"journal":{"name":"2013 Second International Japan-Egypt Conference on Electronics, Communications and Computers (JEC-ECC)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123401142","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 : 2013-12-01DOI: 10.1109/JEC-ECC.2013.6766375
Saly S. Hassaneen, H. Soliman, K. Elbarbary, A. Elhennawy
Multiple input multiple output (MIMO) orthogonal frequency division multiplexing (OFDM) technology is one of the most attractive candidates for fourth generation (4G) mobile radio communications. It effectively combats the multipath fading channel and improves the bandwidth efficiency. At the same time, it also increases system capacity so as to provide a reliable transmission. However, the main drawback of MIMO OFDM systems is high peak to average power ratio (PAPR), which result in many restrictions for practical applications. In this paper, the low complexity partial transmit sequences (PTS) is adopted to be modified using circular shifting, it exploits the extra degree of freedom provided by MIMO, to improve PAPR reduction in MIMO OFDM systems. Merging the circular shifting with phase rotation in low complexity PTS is also proposed, to provide more PAPR reduction.
{"title":"Modified PTS with circular shifting for PAPR reduction in MIMO OFDM systems","authors":"Saly S. Hassaneen, H. Soliman, K. Elbarbary, A. Elhennawy","doi":"10.1109/JEC-ECC.2013.6766375","DOIUrl":"https://doi.org/10.1109/JEC-ECC.2013.6766375","url":null,"abstract":"Multiple input multiple output (MIMO) orthogonal frequency division multiplexing (OFDM) technology is one of the most attractive candidates for fourth generation (4G) mobile radio communications. It effectively combats the multipath fading channel and improves the bandwidth efficiency. At the same time, it also increases system capacity so as to provide a reliable transmission. However, the main drawback of MIMO OFDM systems is high peak to average power ratio (PAPR), which result in many restrictions for practical applications. In this paper, the low complexity partial transmit sequences (PTS) is adopted to be modified using circular shifting, it exploits the extra degree of freedom provided by MIMO, to improve PAPR reduction in MIMO OFDM systems. Merging the circular shifting with phase rotation in low complexity PTS is also proposed, to provide more PAPR reduction.","PeriodicalId":379820,"journal":{"name":"2013 Second International Japan-Egypt Conference on Electronics, Communications and Computers (JEC-ECC)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132910511","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 : 2013-12-01DOI: 10.1109/JEC-ECC.2013.6766377
Ehab Farouk Badran, Marwa Samara, M. Aly
Orthogonal Frequency Division Multiplexing (OFDM) has been widely adopted in wireless communication. The aim of this paper is to analysis and improve performance of frame synchronization in OFDM system using wavelet packet transform. It is well known in OFDM that a cyclic prefix (CP) is appended to each symbol in order to mitigate the effect of Inter-Symbol-Interference (ISI). In this paper ternary sequences are added to the CP in the time domain. Wavelet packet transform is employed besides FFT-OFDM system. This improves the BER (Bit Error Rate) over Rayleigh fading channel. Also, the detection of the frame position is improved by evaluating the correlation characteristic. Wavelet families such as Daubechies and biorthogonal are studied.
{"title":"A Novel Frame Synchronization Scheme Via Wavelet Packet Transform for OFDM systems","authors":"Ehab Farouk Badran, Marwa Samara, M. Aly","doi":"10.1109/JEC-ECC.2013.6766377","DOIUrl":"https://doi.org/10.1109/JEC-ECC.2013.6766377","url":null,"abstract":"Orthogonal Frequency Division Multiplexing (OFDM) has been widely adopted in wireless communication. The aim of this paper is to analysis and improve performance of frame synchronization in OFDM system using wavelet packet transform. It is well known in OFDM that a cyclic prefix (CP) is appended to each symbol in order to mitigate the effect of Inter-Symbol-Interference (ISI). In this paper ternary sequences are added to the CP in the time domain. Wavelet packet transform is employed besides FFT-OFDM system. This improves the BER (Bit Error Rate) over Rayleigh fading channel. Also, the detection of the frame position is improved by evaluating the correlation characteristic. Wavelet families such as Daubechies and biorthogonal are studied.","PeriodicalId":379820,"journal":{"name":"2013 Second International Japan-Egypt Conference on Electronics, Communications and Computers (JEC-ECC)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125516925","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 : 2013-12-01DOI: 10.1109/JEC-ECC.2013.6766405
Ahmed Abdalrahman, Abdalhalim Zekry
This paper is aimed to present the practical implementation of a control algorithm for the grid-connected inverter (GCI) using dsPIC microcontroller. The GCI is considered an important section in renewable-energy conversion systems, of which its performance has a direct influence on the entire renewable-energy generation system. The control of the GCI must ensure the capability of matching inverter output voltage and frequency with continuous fluctuating grid voltage and frequency. In this paper, different types of control algorithms for the GCI are reviewed. Then their performances are compared and a particular control algorithm is chosen to be implemented. The proposed control algorithm including the whole system control is implemented on a low cost, single-chip microcontroller dsPIC30F3010. The hardware configuration of the microcontroller circuit, algorithm, and flowchart are presented. Finally, the experimental results are shown in this paper.
{"title":"Control of the grid-connected inverter using dsPIC microcontroller","authors":"Ahmed Abdalrahman, Abdalhalim Zekry","doi":"10.1109/JEC-ECC.2013.6766405","DOIUrl":"https://doi.org/10.1109/JEC-ECC.2013.6766405","url":null,"abstract":"This paper is aimed to present the practical implementation of a control algorithm for the grid-connected inverter (GCI) using dsPIC microcontroller. The GCI is considered an important section in renewable-energy conversion systems, of which its performance has a direct influence on the entire renewable-energy generation system. The control of the GCI must ensure the capability of matching inverter output voltage and frequency with continuous fluctuating grid voltage and frequency. In this paper, different types of control algorithms for the GCI are reviewed. Then their performances are compared and a particular control algorithm is chosen to be implemented. The proposed control algorithm including the whole system control is implemented on a low cost, single-chip microcontroller dsPIC30F3010. The hardware configuration of the microcontroller circuit, algorithm, and flowchart are presented. Finally, the experimental results are shown in this paper.","PeriodicalId":379820,"journal":{"name":"2013 Second International Japan-Egypt Conference on Electronics, Communications and Computers (JEC-ECC)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129596595","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 : 2013-12-01DOI: 10.1109/JEC-ECC.2013.6766394
Hamada Esmaiel, D. Jiang
Due to multipath propagation and frequency selective fading, there are many obstacles for reliable and high data rate underwater acoustic (UWA) communication. The effective use of OFDM in underwater channel also suffers from its high sensitivity to carrier frequency offset, which distorts the orthogonality between subcarriers due to Inter-Carrier Interference (ICI). Bandwidth limited systems often employ pulse shaping techniques for the reduction of ICI, and minimize the likelihood of errors at the receiver. Such reduction can be achieved by minimizing the side lobes as much as possible. Since the side lobes contribute to the ICI power, which also results in the decrease of Signal to Interference Ratio (SIR). In this paper, the ICI and SIR performance under pulse shaping technique is studied for underwater acoustic channel. Performance comparison of OFDM Discrete Fourier Transform (DFT)-based pulses and Discrete Cosine Transform (DCT)-based pulses is conducted. Simulation results show that, the modified raised cosine pulse shape technique can achieve better performance of ICI power reduction, SIR and BER performances for underwater acoustic channel in comparison to several other commonly used pulses. The IDCT-OFDM is strongly resistant to inter-carrier interference in underwater acoustic channel. The resultant system can also demonstrate reasonably good bit error rate performance. A system scheme is then proposed based on the identified signal pulse.
{"title":"OFDM Inter-Carrier Interference reduction using pulse shaping function for underwater acoustic communications systems","authors":"Hamada Esmaiel, D. Jiang","doi":"10.1109/JEC-ECC.2013.6766394","DOIUrl":"https://doi.org/10.1109/JEC-ECC.2013.6766394","url":null,"abstract":"Due to multipath propagation and frequency selective fading, there are many obstacles for reliable and high data rate underwater acoustic (UWA) communication. The effective use of OFDM in underwater channel also suffers from its high sensitivity to carrier frequency offset, which distorts the orthogonality between subcarriers due to Inter-Carrier Interference (ICI). Bandwidth limited systems often employ pulse shaping techniques for the reduction of ICI, and minimize the likelihood of errors at the receiver. Such reduction can be achieved by minimizing the side lobes as much as possible. Since the side lobes contribute to the ICI power, which also results in the decrease of Signal to Interference Ratio (SIR). In this paper, the ICI and SIR performance under pulse shaping technique is studied for underwater acoustic channel. Performance comparison of OFDM Discrete Fourier Transform (DFT)-based pulses and Discrete Cosine Transform (DCT)-based pulses is conducted. Simulation results show that, the modified raised cosine pulse shape technique can achieve better performance of ICI power reduction, SIR and BER performances for underwater acoustic channel in comparison to several other commonly used pulses. The IDCT-OFDM is strongly resistant to inter-carrier interference in underwater acoustic channel. The resultant system can also demonstrate reasonably good bit error rate performance. A system scheme is then proposed based on the identified signal pulse.","PeriodicalId":379820,"journal":{"name":"2013 Second International Japan-Egypt Conference on Electronics, Communications and Computers (JEC-ECC)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131212807","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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