Pub Date : 2014-03-27DOI: 10.1109/ICACT.2014.6778963
Arttapol Reangsuntea, Pornpawit Boonsrimuang, P. Reangsuntea, P. Boonsrimuang, Hideo Kobayashi
We have proposed one of the distortion-less PAPR reduction methods which employs the Permutation Sequence (PS) in the frequency domain with embedded side information. However, the proposed PS method has high computation complexity. To improve the computation complexity for the previous proposed PS method, this paper proposes a low-complexity PS method which can keep the better peak-to-average power ratio (PAPR). In the proposed PS method, the signals at the middle stages of an N-point radix IFFT using decimation in frequency (DIF) is considered for PS processing. This paper shows that the proposed method has a lower multiplicative complexity than conventional PS method with keeping the PAPR reduction performance. The proposed method is called PS based radix IFFT, where DIF-IFFT is assigned through different stages of the IFFT transform. This proposed method can reduce the multiplicative complexity relatively with keeping the similar PAPR reduction to other methods such as C-PTS and C-PS. The proposed method also can reduce the side information as compared with the C-PTS. This paper presents the various computer simulation results to verify the effectiveness of proposed method.
{"title":"A low-complexity PS based radix IFFT method for PAPR reduction in OFDM systems","authors":"Arttapol Reangsuntea, Pornpawit Boonsrimuang, P. Reangsuntea, P. Boonsrimuang, Hideo Kobayashi","doi":"10.1109/ICACT.2014.6778963","DOIUrl":"https://doi.org/10.1109/ICACT.2014.6778963","url":null,"abstract":"We have proposed one of the distortion-less PAPR reduction methods which employs the Permutation Sequence (PS) in the frequency domain with embedded side information. However, the proposed PS method has high computation complexity. To improve the computation complexity for the previous proposed PS method, this paper proposes a low-complexity PS method which can keep the better peak-to-average power ratio (PAPR). In the proposed PS method, the signals at the middle stages of an N-point radix IFFT using decimation in frequency (DIF) is considered for PS processing. This paper shows that the proposed method has a lower multiplicative complexity than conventional PS method with keeping the PAPR reduction performance. The proposed method is called PS based radix IFFT, where DIF-IFFT is assigned through different stages of the IFFT transform. This proposed method can reduce the multiplicative complexity relatively with keeping the similar PAPR reduction to other methods such as C-PTS and C-PS. The proposed method also can reduce the side information as compared with the C-PTS. This paper presents the various computer simulation results to verify the effectiveness of proposed method.","PeriodicalId":6380,"journal":{"name":"16th International Conference on Advanced Communication Technology","volume":"2004 1","pages":"273-278"},"PeriodicalIF":0.0,"publicationDate":"2014-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90324476","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 : 2014-03-27DOI: 10.1109/ICACT.2014.6779035
Miyoung Huh, Wook Hyun, Sung Hei Kim, Shin-Gak Kang
It is very important sevice to provide disaster alerting function via digital signage. In this paper, we describe the design of functionality to provide disaster alert event produced from the disaster alert agency to the digital signage terminal through the digital signage server.
{"title":"Design of disaster alerting functionality for digital signage service","authors":"Miyoung Huh, Wook Hyun, Sung Hei Kim, Shin-Gak Kang","doi":"10.1109/ICACT.2014.6779035","DOIUrl":"https://doi.org/10.1109/ICACT.2014.6779035","url":null,"abstract":"It is very important sevice to provide disaster alerting function via digital signage. In this paper, we describe the design of functionality to provide disaster alert event produced from the disaster alert agency to the digital signage terminal through the digital signage server.","PeriodicalId":6380,"journal":{"name":"16th International Conference on Advanced Communication Technology","volume":"21 1","pages":"618-621"},"PeriodicalIF":0.0,"publicationDate":"2014-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82267994","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 : 2014-03-27DOI: 10.1109/ICACT.2014.6778952
Z. Adhoni, H. Al Hamad, A. A. Siddiqi, Zaheer Ahmed Adhonid
In this paper, we describe a Cloud-Based Cross LANGUAGE Search engine, which aims at providing a unifying framework for searching the Quranic verses in multi-language. It uses Drupal technology for the implementation Includes all necessary components for searching, building mobile applications and social networks around the central theme of Qur'an. A salient feature of the proposed API is the ability to retrieve Qur'anic verses in Arabic using search phrases in languages other than Arabic. The other part is design of a Mushaf recitation which is also cloud based and multi-language., we describe the core components and design patterns of the proposed API with emphasis on key design criteria.
{"title":"A Cloud-Based Cross Language Search engine for Quranic application","authors":"Z. Adhoni, H. Al Hamad, A. A. Siddiqi, Zaheer Ahmed Adhonid","doi":"10.1109/ICACT.2014.6778952","DOIUrl":"https://doi.org/10.1109/ICACT.2014.6778952","url":null,"abstract":"In this paper, we describe a Cloud-Based Cross LANGUAGE Search engine, which aims at providing a unifying framework for searching the Quranic verses in multi-language. It uses Drupal technology for the implementation Includes all necessary components for searching, building mobile applications and social networks around the central theme of Qur'an. A salient feature of the proposed API is the ability to retrieve Qur'anic verses in Arabic using search phrases in languages other than Arabic. The other part is design of a Mushaf recitation which is also cloud based and multi-language., we describe the core components and design patterns of the proposed API with emphasis on key design criteria.","PeriodicalId":6380,"journal":{"name":"16th International Conference on Advanced Communication Technology","volume":"12 1","pages":"218-221"},"PeriodicalIF":0.0,"publicationDate":"2014-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85129064","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 : 2014-03-27DOI: 10.1109/ICACT.2014.6778988
W. Ding, ZhiMin Gu, Feng Gao
Recently, research community has advanced in type reconstruction technology for reverse engineering, but emerging with obfuscate technology, data type reconstruction is difficult and obfuscated code is easier to be monitored and analyzed by attacker or hacker. Therefore, we present a novel approach for automatic establish data type inference rules and reconstruct type from obfuscated binary programs using machine learning algorithm.
{"title":"Reconstruction of data type in obfuscated binary programs","authors":"W. Ding, ZhiMin Gu, Feng Gao","doi":"10.1109/ICACT.2014.6778988","DOIUrl":"https://doi.org/10.1109/ICACT.2014.6778988","url":null,"abstract":"Recently, research community has advanced in type reconstruction technology for reverse engineering, but emerging with obfuscate technology, data type reconstruction is difficult and obfuscated code is easier to be monitored and analyzed by attacker or hacker. Therefore, we present a novel approach for automatic establish data type inference rules and reconstruct type from obfuscated binary programs using machine learning algorithm.","PeriodicalId":6380,"journal":{"name":"16th International Conference on Advanced Communication Technology","volume":"44 1","pages":"393-396"},"PeriodicalIF":0.0,"publicationDate":"2014-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79447654","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 : 2014-03-27DOI: 10.1109/ICACT.2014.6779023
Abdelhakim Khlifi, R. Bouallègue
LTE is defined as the 4G generation network providing high data rates. Channel estimation is important in the wireless system conception. Classical LMMSE channel estimation techniques require O(N3) floating operations and O(N2) memory locations (N is the size of the channel autocorrelation). In this paper, we propose fast channel estimation techniques for LTE based on fast solver for linear Toeplitz system with reconstructible Cauchy-like structure. Proposed fast algorithms require only O(N2) floating operations and O(N) memory locations. Performances of proposed fast algorithms are verified via Monte-Carlo MATLAB simulations.
{"title":"Fast channel estimation techniques for LTE downlink systems based on fast linear Toeplitz system solver","authors":"Abdelhakim Khlifi, R. Bouallègue","doi":"10.1109/ICACT.2014.6779023","DOIUrl":"https://doi.org/10.1109/ICACT.2014.6779023","url":null,"abstract":"LTE is defined as the 4G generation network providing high data rates. Channel estimation is important in the wireless system conception. Classical LMMSE channel estimation techniques require O(N3) floating operations and O(N2) memory locations (N is the size of the channel autocorrelation). In this paper, we propose fast channel estimation techniques for LTE based on fast solver for linear Toeplitz system with reconstructible Cauchy-like structure. Proposed fast algorithms require only O(N2) floating operations and O(N) memory locations. Performances of proposed fast algorithms are verified via Monte-Carlo MATLAB simulations.","PeriodicalId":6380,"journal":{"name":"16th International Conference on Advanced Communication Technology","volume":"2 1","pages":"563-567"},"PeriodicalIF":0.0,"publicationDate":"2014-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79730669","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 : 2014-03-27DOI: 10.1109/ICACT.2014.6779181
Inès Ben Hassine, R. Bouallègue
With their very Algebraic-construction based on Quaternionic algebra, Algebraic Space Time Codes (ASTC), called the Golden codes, have a full rate, full diversity and non-vanishing constant minimum determinant for increasing spectral efficiency. They have also uniform average transmitted energy per antenna and good shaping, readily lend themselves to high data rate situations. In this paper, we first analyze the performances of the ASTC codes in correlated Rayleigh channel. We consider a coherent demodulator using different decoding schemes and we analyze the Bit Error Rate (BER). In order to increase the spectral efficiency and to maximize the coding gain, ASTC have been proposed for MIMO flat fading channels. To deal with the frequency selectivity, we use the OFDM modulation. So we analyze the performances of an ASTC-MIMO-OFDM system in terms of BER. Finally, we investigate the impact of spatial correlation on the ASTC code design in terms of BER and capacity.
{"title":"Performances analysis of Algebraic Space Time Code under correlated and uncorrelated channels","authors":"Inès Ben Hassine, R. Bouallègue","doi":"10.1109/ICACT.2014.6779181","DOIUrl":"https://doi.org/10.1109/ICACT.2014.6779181","url":null,"abstract":"With their very Algebraic-construction based on Quaternionic algebra, Algebraic Space Time Codes (ASTC), called the Golden codes, have a full rate, full diversity and non-vanishing constant minimum determinant for increasing spectral efficiency. They have also uniform average transmitted energy per antenna and good shaping, readily lend themselves to high data rate situations. In this paper, we first analyze the performances of the ASTC codes in correlated Rayleigh channel. We consider a coherent demodulator using different decoding schemes and we analyze the Bit Error Rate (BER). In order to increase the spectral efficiency and to maximize the coding gain, ASTC have been proposed for MIMO flat fading channels. To deal with the frequency selectivity, we use the OFDM modulation. So we analyze the performances of an ASTC-MIMO-OFDM system in terms of BER. Finally, we investigate the impact of spatial correlation on the ASTC code design in terms of BER and capacity.","PeriodicalId":6380,"journal":{"name":"16th International Conference on Advanced Communication Technology","volume":"57 1","pages":"262-268"},"PeriodicalIF":0.0,"publicationDate":"2014-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80330816","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 : 2014-03-27DOI: 10.1109/ICACT.2014.6778914
T. Hemmati, M. H. Y. Moghadam
Due the complexity of the wireless environments, single technology cannot be efficient to provide demands of mobile users. Hence, in cooperation with heterogeneous wireless technologies, the next generation of wireless systems makes it possible to communicate everywhere. Providing high performance and data rate is what this cooperation has promised to meet. So issues related to the heterogeneity of wireless environment like handover should be addressed. With the appearance of overlapping wireless networks, MNs have to switch their connections between different access technologies having different capabilities and characteristics. In this case, the handover process is more complex and is known as Vertical Handover. In this paper, we focus on the vertical handover management and use an extension of SIP to support vertical handover with bicasting. Delay reduction and SIP signaling messages overhead reduction are the challenges we have tried to improve with our proposed method. To evaluate our proposed method, we use the OPNET Modeler 14.5 and it's Performance for real-time service besides examining the VoIP. Simulation has been performed on UMTS/WLAN networks. The results show that our technique can improve latency and throughput.
{"title":"SIP-based vertical handover scheme with bicasting","authors":"T. Hemmati, M. H. Y. Moghadam","doi":"10.1109/ICACT.2014.6778914","DOIUrl":"https://doi.org/10.1109/ICACT.2014.6778914","url":null,"abstract":"Due the complexity of the wireless environments, single technology cannot be efficient to provide demands of mobile users. Hence, in cooperation with heterogeneous wireless technologies, the next generation of wireless systems makes it possible to communicate everywhere. Providing high performance and data rate is what this cooperation has promised to meet. So issues related to the heterogeneity of wireless environment like handover should be addressed. With the appearance of overlapping wireless networks, MNs have to switch their connections between different access technologies having different capabilities and characteristics. In this case, the handover process is more complex and is known as Vertical Handover. In this paper, we focus on the vertical handover management and use an extension of SIP to support vertical handover with bicasting. Delay reduction and SIP signaling messages overhead reduction are the challenges we have tried to improve with our proposed method. To evaluate our proposed method, we use the OPNET Modeler 14.5 and it's Performance for real-time service besides examining the VoIP. Simulation has been performed on UMTS/WLAN networks. The results show that our technique can improve latency and throughput.","PeriodicalId":6380,"journal":{"name":"16th International Conference on Advanced Communication Technology","volume":"52 1","pages":"19-22"},"PeriodicalIF":0.0,"publicationDate":"2014-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79155757","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 : 2014-03-27DOI: 10.1109/ICACT.2014.6778965
Joonyoung Jung, Dong-oh Kang, C. Bae
The distance estimation between mobile devices is a fundamental issue for a lot of applications of indoor wireless body area network (WBAN). The RSSI have been used to estimate the distance based on the received signal strength from another mobile device. Theoretically, the signal strength is inversely proportional to squared distance, and there is a known radio propagation model that is used to convert the signal strength into distance. However, in real environments, it is hard to measure distance using RSSI because of noises, obstacles, and the type of antenna. Distance estimation using RSSI in real-world applications is still questionable because of inaccuracy. However, RSSI could become the most used technology of distance estimation from the cost/precision viewpoint because of low cost. Mobile devices need to recognize each other in office environment automatically. However, distance estimation using the RSSI of Bluetooth is difficult because of large deviation of RSSI value. This paper provides the experimental results of RSSI measurement between mobile devices in office environment. And it applies the Low Pass Filter (LPF) to reduce the deviation of RSSI value. This paper shows that the distance estimation to recognize WBAN area is possible clearly when Bluetooth RSSI LPF data are used.
{"title":"Automatic WBAN area recognition using P2P signal strength in office environment","authors":"Joonyoung Jung, Dong-oh Kang, C. Bae","doi":"10.1109/ICACT.2014.6778965","DOIUrl":"https://doi.org/10.1109/ICACT.2014.6778965","url":null,"abstract":"The distance estimation between mobile devices is a fundamental issue for a lot of applications of indoor wireless body area network (WBAN). The RSSI have been used to estimate the distance based on the received signal strength from another mobile device. Theoretically, the signal strength is inversely proportional to squared distance, and there is a known radio propagation model that is used to convert the signal strength into distance. However, in real environments, it is hard to measure distance using RSSI because of noises, obstacles, and the type of antenna. Distance estimation using RSSI in real-world applications is still questionable because of inaccuracy. However, RSSI could become the most used technology of distance estimation from the cost/precision viewpoint because of low cost. Mobile devices need to recognize each other in office environment automatically. However, distance estimation using the RSSI of Bluetooth is difficult because of large deviation of RSSI value. This paper provides the experimental results of RSSI measurement between mobile devices in office environment. And it applies the Low Pass Filter (LPF) to reduce the deviation of RSSI value. This paper shows that the distance estimation to recognize WBAN area is possible clearly when Bluetooth RSSI LPF data are used.","PeriodicalId":6380,"journal":{"name":"16th International Conference on Advanced Communication Technology","volume":"41 1","pages":"282-285"},"PeriodicalIF":0.0,"publicationDate":"2014-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78376456","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 : 2014-03-27DOI: 10.1109/ICACT.2014.6779010
Laurent Cailleux, A. Bouabdallah, J. Bonnin
Despite all the current controversies, the success of the email service is still valid. The ease of use of its various features contributed to its widespread adoption. In general, the email system provides for all its users the same set of features controlled by a single monolithic policy. Such solutions are efficient but limited because they grant no place for the concept of usage which denotes a user's intention of communication: private, professional, administrative, official, military. The ability to efficiently send emails from mobile devices creates new interesting opportunities. We argue that the context (location, time, device, operating system, access network...) of the email sender appears as a new dimension we have to take into account to complete the picture. Context is clearly orthogonal to usage because a same usage may require different features depending of the context. It is clear that there is no global policy meeting requirements of all possible usages and contexts. To address this problem, we propose to define a correspondence model which for a given usage and context allows to derive a correspondence type encapsulating the exact set of required features. With this model, it becomes possible to define an advanced email system which may cope with multiple policies instead of a single monolithic one. By allowing a user to select the exact policy coping with her needs, we argue that our approach reduces the risk-taking allowing the email system to slide from a trusted one to a confident one.
{"title":"A confident email system based on a new correspondence model","authors":"Laurent Cailleux, A. Bouabdallah, J. Bonnin","doi":"10.1109/ICACT.2014.6779010","DOIUrl":"https://doi.org/10.1109/ICACT.2014.6779010","url":null,"abstract":"Despite all the current controversies, the success of the email service is still valid. The ease of use of its various features contributed to its widespread adoption. In general, the email system provides for all its users the same set of features controlled by a single monolithic policy. Such solutions are efficient but limited because they grant no place for the concept of usage which denotes a user's intention of communication: private, professional, administrative, official, military. The ability to efficiently send emails from mobile devices creates new interesting opportunities. We argue that the context (location, time, device, operating system, access network...) of the email sender appears as a new dimension we have to take into account to complete the picture. Context is clearly orthogonal to usage because a same usage may require different features depending of the context. It is clear that there is no global policy meeting requirements of all possible usages and contexts. To address this problem, we propose to define a correspondence model which for a given usage and context allows to derive a correspondence type encapsulating the exact set of required features. With this model, it becomes possible to define an advanced email system which may cope with multiple policies instead of a single monolithic one. By allowing a user to select the exact policy coping with her needs, we argue that our approach reduces the risk-taking allowing the email system to slide from a trusted one to a confident one.","PeriodicalId":6380,"journal":{"name":"16th International Conference on Advanced Communication Technology","volume":"74 1","pages":"489-492"},"PeriodicalIF":0.0,"publicationDate":"2014-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78145755","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 : 2014-03-27DOI: 10.1109/ICACT.2014.6779190
F. Mustafa, A. Khalaf, F. A. Elgeldawy
Fiber Raman amplifiers in ultra wideband wavelength division multiplexing (UW-WDM) systems have recently received much more attention because of their greatly extended bandwidth and distributed amplification with the installed fiber as gain medium. It has been shown that the bandwidth of the amplifier can be further increased and gain spectrum can be tailored by using pumping with multiple wavelengths. In this paper, the distributed multi-pumping Raman amplifier has been studied and analyzed by testing two designed model of amplifier to obtain the gain of maximum flatness and bandwidth. Also we have investigated the effects of many parameters on the gain and bandwidth of Raman amplifier such as: pumping wavelength, offset wavelength, the relative refractive index difference and the number and location of the cascaded units used in the amplifier model design. The models is analyzed where six and eight Raman pumping of special pumping power and pumping wavelengths are lunched in the forward direction where each model is analyzed by two different way. The gain is computed over the spectral optical wavelengths (1.45μm ≤ λ signal ≤ 1.65μm). The differential gain of each unit of the amplifier is obtained according to the straight line-exponential model of a small maximum constant gain of 7.4×10-14 m/W over an optical wavelength interval of 16 nm.
{"title":"Gain and bandwidth improvements for distributed Raman amplifier in UW-WDM communication systems","authors":"F. Mustafa, A. Khalaf, F. A. Elgeldawy","doi":"10.1109/ICACT.2014.6779190","DOIUrl":"https://doi.org/10.1109/ICACT.2014.6779190","url":null,"abstract":"Fiber Raman amplifiers in ultra wideband wavelength division multiplexing (UW-WDM) systems have recently received much more attention because of their greatly extended bandwidth and distributed amplification with the installed fiber as gain medium. It has been shown that the bandwidth of the amplifier can be further increased and gain spectrum can be tailored by using pumping with multiple wavelengths. In this paper, the distributed multi-pumping Raman amplifier has been studied and analyzed by testing two designed model of amplifier to obtain the gain of maximum flatness and bandwidth. Also we have investigated the effects of many parameters on the gain and bandwidth of Raman amplifier such as: pumping wavelength, offset wavelength, the relative refractive index difference and the number and location of the cascaded units used in the amplifier model design. The models is analyzed where six and eight Raman pumping of special pumping power and pumping wavelengths are lunched in the forward direction where each model is analyzed by two different way. The gain is computed over the spectral optical wavelengths (1.45μm ≤ λ signal ≤ 1.65μm). The differential gain of each unit of the amplifier is obtained according to the straight line-exponential model of a small maximum constant gain of 7.4×10-14 m/W over an optical wavelength interval of 16 nm.","PeriodicalId":6380,"journal":{"name":"16th International Conference on Advanced Communication Technology","volume":"88 1","pages":"329-336"},"PeriodicalIF":0.0,"publicationDate":"2014-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78367399","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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