Pub Date : 2009-04-22DOI: 10.1109/WTS.2009.5069004
V. K. Konopilko, A. Korolov, A. S. Alalem
In the introduced method, detection of method is carried out without any decrease in correcting ability of codes and use interleaver code symbols, that essentially reduces an information delay at decoding. It is established, that the method on the basis of soft decision-making by demodulator DCC provides many times smaller probability of the erroneous admission of a packet of deleting.
{"title":"Method correction of grouped errors and detection of not corrected packets of obliteration","authors":"V. K. Konopilko, A. Korolov, A. S. Alalem","doi":"10.1109/WTS.2009.5069004","DOIUrl":"https://doi.org/10.1109/WTS.2009.5069004","url":null,"abstract":"In the introduced method, detection of method is carried out without any decrease in correcting ability of codes and use interleaver code symbols, that essentially reduces an information delay at decoding. It is established, that the method on the basis of soft decision-making by demodulator DCC provides many times smaller probability of the erroneous admission of a packet of deleting.","PeriodicalId":313087,"journal":{"name":"2009 Wireless Telecommunications Symposium","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127284325","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 : 2009-04-22DOI: 10.1109/WTS.2009.5069001
M. Klymash, V. Pelishok, I. Demydov, N. Kryvinska
In this paper, the theoretical expressions for 1-st to 10-th order optimum Wiener filter with the input assumed to be a discrete harmonic informative signal are estimated. The analytical values of transmission characteristics depending on the order of filter are obtained.
{"title":"Comparative analysis of maximal signal output for adaptive filters of different order","authors":"M. Klymash, V. Pelishok, I. Demydov, N. Kryvinska","doi":"10.1109/WTS.2009.5069001","DOIUrl":"https://doi.org/10.1109/WTS.2009.5069001","url":null,"abstract":"In this paper, the theoretical expressions for 1-st to 10-th order optimum Wiener filter with the input assumed to be a discrete harmonic informative signal are estimated. The analytical values of transmission characteristics depending on the order of filter are obtained.","PeriodicalId":313087,"journal":{"name":"2009 Wireless Telecommunications Symposium","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125657400","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 : 2009-04-22DOI: 10.1109/WTS.2009.5068964
M. Lasanen, Matti Weissenfelt, Jari Perttu, A. Byman
A user terminal must first be timing synchronized with a base station to continue with further actions. Critical issues in timing synchronization are timing accuracy and complexity of the algorithms. In this paper, we present a low complexity downlink timing synchronization implementation for the mobile IEEE802.16e OFDMA WiMAX system. The design can use information from multiple receiver antennas. In addition, averaging of estimates over a number of successive frames is possible. The implementation compensates DC offset from the signal before actual synchronization. Performance of different options of the design in terms of estimation accuracy is demonstrated.
{"title":"Implementation and performance of low complexity SIMO OFDM timing synchronization","authors":"M. Lasanen, Matti Weissenfelt, Jari Perttu, A. Byman","doi":"10.1109/WTS.2009.5068964","DOIUrl":"https://doi.org/10.1109/WTS.2009.5068964","url":null,"abstract":"A user terminal must first be timing synchronized with a base station to continue with further actions. Critical issues in timing synchronization are timing accuracy and complexity of the algorithms. In this paper, we present a low complexity downlink timing synchronization implementation for the mobile IEEE802.16e OFDMA WiMAX system. The design can use information from multiple receiver antennas. In addition, averaging of estimates over a number of successive frames is possible. The implementation compensates DC offset from the signal before actual synchronization. Performance of different options of the design in terms of estimation accuracy is demonstrated.","PeriodicalId":313087,"journal":{"name":"2009 Wireless Telecommunications Symposium","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132471523","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 : 2009-04-22DOI: 10.1109/WTS.2009.5068968
M. Höyhtyä, Tao Chen, A. Mämmelä
In order to minimize interference with primary users (PU), cognitive radios should operate multidimensionally over time, frequency, and space. This paper addresses the problem with power control and predictive frequency selection. Both the methods are coupled with spectrum sensing. The proposed frequency selection method minimizes the amount of channel switches, which increases the capacity of the system and decreases the number of collisions with PUs. It is shown that the allowed transmission power of an SU scales linearly with increasing primary transmission power. The results illustrate the effect of the antenna height to the maximum power; a high-antenna PU transmitter allows more powerful SUs. Moreover, simulations indicate that the power control method reduces greatly the amount of interference imposed towards PUs.
{"title":"Interference management in frequency, time, and space domains for cognitive radios","authors":"M. Höyhtyä, Tao Chen, A. Mämmelä","doi":"10.1109/WTS.2009.5068968","DOIUrl":"https://doi.org/10.1109/WTS.2009.5068968","url":null,"abstract":"In order to minimize interference with primary users (PU), cognitive radios should operate multidimensionally over time, frequency, and space. This paper addresses the problem with power control and predictive frequency selection. Both the methods are coupled with spectrum sensing. The proposed frequency selection method minimizes the amount of channel switches, which increases the capacity of the system and decreases the number of collisions with PUs. It is shown that the allowed transmission power of an SU scales linearly with increasing primary transmission power. The results illustrate the effect of the antenna height to the maximum power; a high-antenna PU transmitter allows more powerful SUs. Moreover, simulations indicate that the power control method reduces greatly the amount of interference imposed towards PUs.","PeriodicalId":313087,"journal":{"name":"2009 Wireless Telecommunications Symposium","volume":"227 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132861301","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 : 2009-04-22DOI: 10.1109/WTS.2009.5068969
B. Benyó, A. Vilmos, G. Fördös, B. Sódor, L. Kovács
NFC is one of the latest wireless communication technologies, making possible variety of business opportunities. StoLPaN, a pan-European consortium of companies, universities and user groups aims to define open commercial and technical frameworks for the remote management of NFC-enabled services on mobile devices. These frameworks will facilitate the deployment of NFC-enabled mobile applications regardless of the phone type and the nature of the services required. This paper describes the latest results of StoLPan consortium, the technical and business challenges of the NFC service development, interesting findings about the current issues of the NFC market, and a summary about the StoLPan application framework containing NFC technological details. Application opportunities of NFC services in the retail environment are also introduced.
{"title":"The StoLPan view of the NFC ecosystem","authors":"B. Benyó, A. Vilmos, G. Fördös, B. Sódor, L. Kovács","doi":"10.1109/WTS.2009.5068969","DOIUrl":"https://doi.org/10.1109/WTS.2009.5068969","url":null,"abstract":"NFC is one of the latest wireless communication technologies, making possible variety of business opportunities. StoLPaN, a pan-European consortium of companies, universities and user groups aims to define open commercial and technical frameworks for the remote management of NFC-enabled services on mobile devices. These frameworks will facilitate the deployment of NFC-enabled mobile applications regardless of the phone type and the nature of the services required. This paper describes the latest results of StoLPan consortium, the technical and business challenges of the NFC service development, interesting findings about the current issues of the NFC market, and a summary about the StoLPan application framework containing NFC technological details. Application opportunities of NFC services in the retail environment are also introduced.","PeriodicalId":313087,"journal":{"name":"2009 Wireless Telecommunications Symposium","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131004323","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 : 2009-04-22DOI: 10.1109/WTS.2009.5068983
Hyeran Mun, Kyusuk Han, Kwangjo Kim
The 3rd Generation Partnership Project(3GPP) standard is developing System Architecture Evolution(SAE)/Long Term Evolution(LTE) architecture for the next generation mobile communication system. The SAE/LTE architecture provides secure service and 3G-WLAN interworking [9]. To provide secure 3G-WLAN interworking in the SAE/LTE architecture, Extensible Authentication Protocol-Authentication and Key Agreement(EAP-AKA) is used. However, EAP-AKA has several vulnerabilities such as disclosure of user identity, man-in-the-middle attack, Sequence Number(SQN) synchronization, and additional bandwidth consumption. Therefore, this paper analyzes threats and attacks in 3G-WLAN interworking and proposes a new authentication and key agreement protocol based on EAPAKA. The proposed protocol combines Elliptic Curve Diffie-Hellman(ECDH) with symmetric key cryptosystem to overcome these vulnerabilities. Moreover, our protocol provides Perfect Forward Secrecy(PFS) to guarantee stronger security, mutual authentication, and resistance to replay attack. Compared with previous protocols which use public key cryptosystem with certificates, our protocol can reduce computational overhead.
{"title":"3G-WLAN interworking: security analysis and new authentication and key agreement based on EAP-AKA","authors":"Hyeran Mun, Kyusuk Han, Kwangjo Kim","doi":"10.1109/WTS.2009.5068983","DOIUrl":"https://doi.org/10.1109/WTS.2009.5068983","url":null,"abstract":"The 3rd Generation Partnership Project(3GPP) standard is developing System Architecture Evolution(SAE)/Long Term Evolution(LTE) architecture for the next generation mobile communication system. The SAE/LTE architecture provides secure service and 3G-WLAN interworking [9]. To provide secure 3G-WLAN interworking in the SAE/LTE architecture, Extensible Authentication Protocol-Authentication and Key Agreement(EAP-AKA) is used. However, EAP-AKA has several vulnerabilities such as disclosure of user identity, man-in-the-middle attack, Sequence Number(SQN) synchronization, and additional bandwidth consumption. Therefore, this paper analyzes threats and attacks in 3G-WLAN interworking and proposes a new authentication and key agreement protocol based on EAPAKA. The proposed protocol combines Elliptic Curve Diffie-Hellman(ECDH) with symmetric key cryptosystem to overcome these vulnerabilities. Moreover, our protocol provides Perfect Forward Secrecy(PFS) to guarantee stronger security, mutual authentication, and resistance to replay attack. Compared with previous protocols which use public key cryptosystem with certificates, our protocol can reduce computational overhead.","PeriodicalId":313087,"journal":{"name":"2009 Wireless Telecommunications Symposium","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129267790","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 : 2009-04-22DOI: 10.1109/WTS.2009.5068990
V. Cossiavelou, Philemon Bantimaroudis
Mediation in news industries is being revisiting. Gatekeepers decide which information should be allowed to be delivered into a particular audience. In the modern globalized media landscape, journalists are subject to various influences -- intra-organization and extra-media pressures interplay with cultural and ideological factors. Gatekeeping is a process that interconnects people, routines, institutions, extra-media pressures, and the ideological environment. ICTs related to media technologies influence interactivity among these pillars and wireless technologies have changed the global media gatekeeping landscape. The European Union has experienced dramatic changes in its member-states regulation environment and has initiated processes for the allocation of spectrum resources.
{"title":"Mediation of the message in a wireless global environment: Revisiting the media gatekeeping model","authors":"V. Cossiavelou, Philemon Bantimaroudis","doi":"10.1109/WTS.2009.5068990","DOIUrl":"https://doi.org/10.1109/WTS.2009.5068990","url":null,"abstract":"Mediation in news industries is being revisiting. Gatekeepers decide which information should be allowed to be delivered into a particular audience. In the modern globalized media landscape, journalists are subject to various influences -- intra-organization and extra-media pressures interplay with cultural and ideological factors. Gatekeeping is a process that interconnects people, routines, institutions, extra-media pressures, and the ideological environment. ICTs related to media technologies influence interactivity among these pillars and wireless technologies have changed the global media gatekeeping landscape. The European Union has experienced dramatic changes in its member-states regulation environment and has initiated processes for the allocation of spectrum resources.","PeriodicalId":313087,"journal":{"name":"2009 Wireless Telecommunications Symposium","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122328995","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 : 2009-04-22DOI: 10.1109/WTS.2009.5068949
Ryouhei Kaneko, F. Maehara
This paper derives the theoretical bit error rate (BER) of the multiband orthogonal frequency division multiplexing (MB-OFDM) system for ultra wideband (UWB) communication. The proposed derivation takes into account the fading correlation caused by time and frequency spreading, which is one of the most significant factors in MB-OFDM UWB system. Moreover, the proposed formula gives consideration to the frequency characteristics of propagation loss that are not negligible in UWB systems. The theoretical results by the proposed approach are compared with the computer simulation results in order to confirm the validity of the proposed derivation.
{"title":"Theoretical derivation of bit error rate in MB-OFDM UWB system","authors":"Ryouhei Kaneko, F. Maehara","doi":"10.1109/WTS.2009.5068949","DOIUrl":"https://doi.org/10.1109/WTS.2009.5068949","url":null,"abstract":"This paper derives the theoretical bit error rate (BER) of the multiband orthogonal frequency division multiplexing (MB-OFDM) system for ultra wideband (UWB) communication. The proposed derivation takes into account the fading correlation caused by time and frequency spreading, which is one of the most significant factors in MB-OFDM UWB system. Moreover, the proposed formula gives consideration to the frequency characteristics of propagation loss that are not negligible in UWB systems. The theoretical results by the proposed approach are compared with the computer simulation results in order to confirm the validity of the proposed derivation.","PeriodicalId":313087,"journal":{"name":"2009 Wireless Telecommunications Symposium","volume":"2020 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121198790","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 : 2009-04-22DOI: 10.1109/WTS.2009.5068946
Christopher Holmes, A. Ibing, David Kühling
This paper deals with the implementation of protocol handling in radio link control and medium access control layers using network processing elements, where the focus is on 4G wireless system parameters. We describe the software design and implementation for the Intel IXP2350 processor as an example and provide implementation results. Results are given in terms of feasible and achieved throughput, processor element utilization, thread execution times and memory bus utilization. For the protocol functionality we use the LTE (Advanced) draft standard as a guideline. The software design criteria and consequential implementation choices (such as number of threads and memory access budgets) are easily adaptable to other network processors and similar wireless standards.
{"title":"On network processor based protocol stack implementation for 4G base stations","authors":"Christopher Holmes, A. Ibing, David Kühling","doi":"10.1109/WTS.2009.5068946","DOIUrl":"https://doi.org/10.1109/WTS.2009.5068946","url":null,"abstract":"This paper deals with the implementation of protocol handling in radio link control and medium access control layers using network processing elements, where the focus is on 4G wireless system parameters. We describe the software design and implementation for the Intel IXP2350 processor as an example and provide implementation results. Results are given in terms of feasible and achieved throughput, processor element utilization, thread execution times and memory bus utilization. For the protocol functionality we use the LTE (Advanced) draft standard as a guideline. The software design criteria and consequential implementation choices (such as number of threads and memory access budgets) are easily adaptable to other network processors and similar wireless standards.","PeriodicalId":313087,"journal":{"name":"2009 Wireless Telecommunications Symposium","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116669998","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 : 2009-04-22DOI: 10.1109/WTS.2009.5068951
F. Nadeem, B. Geiger, Max Henkel, E. Leitgeb, Markus Löschnigg, M. S. Awan, A. C. Motlagh, G. Kandus
High bandwidth optical wireless communication links are of prime importance, having tremendous potential to serve for the future huge data transmission requirements especially for the next generation optical networks. The inherent electromagnetic nature of the transmitted optical signals and the stochastic nature of the earth atmosphere create a number of technical challenges preventing widespread acceptance of technology and its implementation. One of the major concerns for Free Space Optics (FSO) links is fog that causes very high attenuation over non-negligible amounts of time. Another technology offering negligible fog attenuation and acceptable data rates is license free ISM band, which can be used as back up link. However, a switch-over mechanism is required for optimal selection of any link depending on weather condition and link quality maintaining an acceptable data rate. Moreover, synchronization of transceivers is the basic requirement of a communication link. This paper presents an implementation of a self-synchronizing switch-over system and the behaviour of this hybrid network is simulated for measured fog events.
{"title":"Switch over implementation and analysis for hybrid wireless network of optical wireless and GHz links","authors":"F. Nadeem, B. Geiger, Max Henkel, E. Leitgeb, Markus Löschnigg, M. S. Awan, A. C. Motlagh, G. Kandus","doi":"10.1109/WTS.2009.5068951","DOIUrl":"https://doi.org/10.1109/WTS.2009.5068951","url":null,"abstract":"High bandwidth optical wireless communication links are of prime importance, having tremendous potential to serve for the future huge data transmission requirements especially for the next generation optical networks. The inherent electromagnetic nature of the transmitted optical signals and the stochastic nature of the earth atmosphere create a number of technical challenges preventing widespread acceptance of technology and its implementation. One of the major concerns for Free Space Optics (FSO) links is fog that causes very high attenuation over non-negligible amounts of time. Another technology offering negligible fog attenuation and acceptable data rates is license free ISM band, which can be used as back up link. However, a switch-over mechanism is required for optimal selection of any link depending on weather condition and link quality maintaining an acceptable data rate. Moreover, synchronization of transceivers is the basic requirement of a communication link. This paper presents an implementation of a self-synchronizing switch-over system and the behaviour of this hybrid network is simulated for measured fog events.","PeriodicalId":313087,"journal":{"name":"2009 Wireless Telecommunications Symposium","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123867263","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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