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2009 Second International Workshop on Cognitive Radio and Advanced Spectrum Management最新文献

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Wireless LAN protected distributed cognitive MAC protocol for secondary system 二级系统无线局域网保护分布式认知MAC协议
2009 Second International Workshop on Cognitive Radio and Advanced Spectrum Management Pub Date : 2009-07-21 DOI: 10.1109/COGART.2009.5167250
So Tanaka, T. Fujii
{"title":"Wireless LAN protected distributed cognitive MAC protocol for secondary system","authors":"So Tanaka, T. Fujii","doi":"10.1109/COGART.2009.5167250","DOIUrl":"https://doi.org/10.1109/COGART.2009.5167250","url":null,"abstract":"This paper focuses on a primary and secondary spectrum sharing system with a modified MAC protocol at the secondary network. The assumed primary system is the wireless LAN (WLAN) operated with the protocol of IEEE 802.11 Distributed Coordination Function (DCF). In such spectrum sharing system, it is required that the primary system is protected from the signals of the secondary system. In this paper, in order to keep the communication of the primary systems over the existence of the secondary systems, we propose a modified novel secondary MAC protocol, which can flexibly share the spectrum between WLAN and the secondary system. The proposed secondary MAC protocol of the packet transmission controls the packet transmission by the permission probability according to the primary system channel occupation ratio. The proposed method can keep the communication chance of the primary system without any change of the primary MAC protocol.","PeriodicalId":154100,"journal":{"name":"2009 Second International Workshop on Cognitive Radio and Advanced Spectrum Management","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114901444","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Cogito test-bed - wireless research evolved 认知试验台——无线研究的发展
2009 Second International Workshop on Cognitive Radio and Advanced Spectrum Management Pub Date : 2009-05-18 DOI: 10.1109/COGART.2009.5167245
N. Pratas, Filippo Meucci, D. Zrno, N. Prasad, A. Rodrigues, R. Prasad
{"title":"Cogito test-bed - wireless research evolved","authors":"N. Pratas, Filippo Meucci, D. Zrno, N. Prasad, A. Rodrigues, R. Prasad","doi":"10.1109/COGART.2009.5167245","DOIUrl":"https://doi.org/10.1109/COGART.2009.5167245","url":null,"abstract":"With each ensuing generation, radio networks are envisioned to support more advanced and differentiated services, enabling new user applications, translating therefore on the need for more bandwidth.","PeriodicalId":154100,"journal":{"name":"2009 Second International Workshop on Cognitive Radio and Advanced Spectrum Management","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127019782","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Performance bounds for Detect and Avoid signal sensing 检测和避免信号感知的性能界限
2009 Second International Workshop on Cognitive Radio and Advanced Spectrum Management Pub Date : 2009-05-18 DOI: 10.1109/COGART.2009.5167248
S. Reisenfeld
{"title":"Performance bounds for Detect and Avoid signal sensing","authors":"S. Reisenfeld","doi":"10.1109/COGART.2009.5167248","DOIUrl":"https://doi.org/10.1109/COGART.2009.5167248","url":null,"abstract":"Detect and Avoid (DAA) is a Cognitive Radio technique for a primary user and secondary users sharing the same spectrum. The DAA spectral sensing system must provide both low decision delay and highly reliable decisions on the presence/absence of primary user transmission. These results provide upper and lower bounds on the decision error rate performance of sensing systems as a function of SNR (signal-to-noise ratio) and the number of samples used in the sensing decision. The bounds represent benchmarks on the performances of practical detection systems and give insight into the trade-off between sensing performance and decision delay.","PeriodicalId":154100,"journal":{"name":"2009 Second International Workshop on Cognitive Radio and Advanced Spectrum Management","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130568373","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Queueing analysis of opportunistic access in cognitive radios 认知无线电中机会接入的排队分析
2009 Second International Workshop on Cognitive Radio and Advanced Spectrum Management Pub Date : 2009-05-18 DOI: 10.1109/COGART.2009.5167252
I. Suliman, J. Lehtomaki
{"title":"Queueing analysis of opportunistic access in cognitive radios","authors":"I. Suliman, J. Lehtomaki","doi":"10.1109/COGART.2009.5167252","DOIUrl":"https://doi.org/10.1109/COGART.2009.5167252","url":null,"abstract":"This paper presents queueing analysis of opportunistic access in cognitive radios. The primary (licensed user) has priority over the secondary user and it does not need to care about the secondary user transmissions. A time slotted system is assumed, so that the secondary user can perform spectrum sensing at the beginning of the slot to know if it is occupied by primary or not. If the slot is free, it can be utilized for secondary transmissions. This leads to no interference with primary user communication, assuming perfect sensing. Finding waiting time and queue length of this type of system has not, according to our best knowledge, been performed before. We perform theoretical analysis by applying M/D/1 priority queueing scheme. The results were used to evaluate the performance of the cognitive network. Simulation are used to validate the results, and simulation results demonstrate a high degree of accuracy for the derived expressions. Results indicate that the performance of the secondary user depends on the data traffic characteristics of the primary user, and under high arrival rate for the primary, the average waiting and average queueing length of the secondary user grow especially when the combined arrival rate approach the queue utilization factor.","PeriodicalId":154100,"journal":{"name":"2009 Second International Workshop on Cognitive Radio and Advanced Spectrum Management","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127142049","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 75
A survey on spectrum sensing techniques for cognitive radio 认知无线电频谱感知技术综述
2009 Second International Workshop on Cognitive Radio and Advanced Spectrum Management Pub Date : 2009-05-18 DOI: 10.1109/COGART.2009.5167237
D. D. Ariananda, M. Lakshmanan, H. Nikookar
{"title":"A survey on spectrum sensing techniques for cognitive radio","authors":"D. D. Ariananda, M. Lakshmanan, H. Nikookar","doi":"10.1109/COGART.2009.5167237","DOIUrl":"https://doi.org/10.1109/COGART.2009.5167237","url":null,"abstract":"Spectrum sensing is an important functionality of cognitive radio (CR). Accuracy and speed of estimation are the key indicators to select the appropriate spectrum sensing technique. Conventional spectrum estimation techniques which are based on short time Fourier transform (STFT) suffer from familiar problems such as low frequency resolution, high variance of estimated power spectrum and high side lobes/leakages. Methods such as multitaper spectrum estimation successfully alleviate these infarctions but exact a high price in terms of complexity. On these accounts, it appears that the filter bank spectrum estimation formulated by F. Boroujeny and wavelet based spectrum estimates are the most promising and pragmatic approaches for CR applications. This article surveys and appraises available literature on various spectrum sensing techniques and discusses spectrum sensing as a key element of CR system design.","PeriodicalId":154100,"journal":{"name":"2009 Second International Workshop on Cognitive Radio and Advanced Spectrum Management","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130934607","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 75
Polyphase channelizer as bandpass filters in multi-standard Software Defined Radios 多标准软件无线电中作为带通滤波器的多相信道化器
2009 Second International Workshop on Cognitive Radio and Advanced Spectrum Management Pub Date : 2009-05-18 DOI: 10.1109/COGART.2009.5167234
Mehmood-ur-Rehman Awan, P. Koch
{"title":"Polyphase channelizer as bandpass filters in multi-standard Software Defined Radios","authors":"Mehmood-ur-Rehman Awan, P. Koch","doi":"10.1109/COGART.2009.5167234","DOIUrl":"https://doi.org/10.1109/COGART.2009.5167234","url":null,"abstract":"The aim of this work is to design efficient bandpass filters for multistandard software defined radios. Software Defined Radio (SDR) based applications which demand high sampling rate to eleminate the most of the analog components require high-performance technology and digital signal processing methods to handle and process the high sample rate data. State of the art technology such as FPGAs can support several hundred MHz of I/O data transfer rate. The internal hardware architecture, however, would limit the maximum operating frequency of the design. An alternative is therefore to use advanced DSP methods to overcome this bottleneck. Polyphase channelizers having spectral shifter to move the filter position are used in a scenario of dual standard (WLAN and UMTS) SDR receiver for the bandpass filtering. It will not only split the data in multiple paths to reduce the per arm data rate but the filter also operates at lower rate than the input sample frequency. Furthermore it can also eleminate the need of IQ demodulator.","PeriodicalId":154100,"journal":{"name":"2009 Second International Workshop on Cognitive Radio and Advanced Spectrum Management","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130956020","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
On the necessity of sensing the non Gaussianity of the interference: Application to uwb systems 干扰非高斯性检测的必要性:在超宽带系统中的应用
2009 Second International Workshop on Cognitive Radio and Advanced Spectrum Management Pub Date : 2009-05-18 DOI: 10.1109/COGART.2009.5167241
J. Fiorina, D. Panaitopol, D. Domenicali
{"title":"On the necessity of sensing the non Gaussianity of the interference: Application to uwb systems","authors":"J. Fiorina, D. Panaitopol, D. Domenicali","doi":"10.1109/COGART.2009.5167241","DOIUrl":"https://doi.org/10.1109/COGART.2009.5167241","url":null,"abstract":"Interference management is a crucial point in cognitive radio. To deal with the interference, systems are used to consider the interference power and its spectral occupation. The negative effects of such interference are often estimated considering that the interference is Gaussian. Ultra Wide Band (UWB) systems are typical systems to be considered in a cognitive radio framework; their huge spectral occupation requires the mechanisms provided by cognitive radio and as they often operate in ad-hoc networks they have to manage the multiuser interference (MUI). However the UWB MUI is often not Gaussian. We propose to investigate the characterization and the management of the non-gaussianity of the MUI.","PeriodicalId":154100,"journal":{"name":"2009 Second International Workshop on Cognitive Radio and Advanced Spectrum Management","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126376854","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Cognitive pilot channel: Enabler for radio systems coexistence 认知导频信道:无线电系统共存的推动者
2009 Second International Workshop on Cognitive Radio and Advanced Spectrum Management Pub Date : 2009-05-18 DOI: 10.1109/COGART.2009.5167226
Marcin Filo, A. Hossain, A. Biswas, R. Piesiewicz
{"title":"Cognitive pilot channel: Enabler for radio systems coexistence","authors":"Marcin Filo, A. Hossain, A. Biswas, R. Piesiewicz","doi":"10.1109/COGART.2009.5167226","DOIUrl":"https://doi.org/10.1109/COGART.2009.5167226","url":null,"abstract":"With an increasing number of collocated personal, local and cellular wireless communication systems, the question of optimum coexistence and inter-networking are raised. Although some mitigation techniques, like DAA, LDC, Frequency band notching etc. are being widely studied by industries, regulation bodies and standardization authorities, none of them show good performance in terms of detection and energy consumption without having a priori knowledge about the primary system which is not usually available. Cognitive radios and networks with cognitive signaling and data-aided mitigation techniques can become then key enablers for true heterogeneous communication environment with optimal sharing of the spectrum and coexistence. Cognitive pilot channel (CPC) is a novel, recently proposed approach which could guarantee a conflict-free coexistence. In this paper we show a generic scheme to achieve better coexistence between UWB and WIMAX through enhancing existing mitigation techniques.","PeriodicalId":154100,"journal":{"name":"2009 Second International Workshop on Cognitive Radio and Advanced Spectrum Management","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124871657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 49
A low-cost protocol and application for UWB localization, exploiting cross-layer design and cognitive radio aspects 一种低成本的超宽带定位协议和应用，利用跨层设计和认知无线电方面
2009 Second International Workshop on Cognitive Radio and Advanced Spectrum Management Pub Date : 2009-05-18 DOI: 10.1109/COGART.2009.5167229
C. Kocks, E. Scheiber, A. Vießmann, Dong Xu, Shangbo Wang, G. Bruck, P. Jung
{"title":"A low-cost protocol and application for UWB localization, exploiting cross-layer design and cognitive radio aspects","authors":"C. Kocks, E. Scheiber, A. Vießmann, Dong Xu, Shangbo Wang, G. Bruck, P. Jung","doi":"10.1109/COGART.2009.5167229","DOIUrl":"https://doi.org/10.1109/COGART.2009.5167229","url":null,"abstract":"The EUWB (Coexisting Short Range Radio by Advanced Ultra-Wideband Radio Technology, FP7-ICT-215669, www.euwb.eu) project has been an industry-led initiative of twenty-one major industrial and excellent academic organizations from Europe and Israel targeting innovative improvement, adaptation, integration and application of short-range Ultra-Wideband Radio Technology (UWB-RT). Started in April 2008, the EUWB project has leveraged and enhanced the scientific knowledge base in the advanced UWB-RT and has provided sophisticated new applications enabled by UWB and highly demanded in several European key industrial sectors such as home entertainment consumer electronics, automotive, public transportation, and heterogeneous cellular networks. Within EUWB, major fields of this emerging challenge have been identified, such as the cognitive radio related Detect-And-Avoid (DAA) technology and the localization and tracking (LT) technology. An important aspect is to design an LT protocol. In this manuscript the authors will first illustrate the technical approach of EUWB, giving a brief overview of the project.","PeriodicalId":154100,"journal":{"name":"2009 Second International Workshop on Cognitive Radio and Advanced Spectrum Management","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127649796","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Design of an RF-subsampling based tri-band AIS and DSC radio receiver 基于射频次采样的三波段AIS和DSC无线电接收机的设计
2009 Second International Workshop on Cognitive Radio and Advanced Spectrum Management Pub Date : 2009-05-18 DOI: 10.1109/COGART.2009.5167235
Malek Naoues, R. Barrak, A. Ghazel
{"title":"Design of an RF-subsampling based tri-band AIS and DSC radio receiver","authors":"Malek Naoues, R. Barrak, A. Ghazel","doi":"10.1109/COGART.2009.5167235","DOIUrl":"https://doi.org/10.1109/COGART.2009.5167235","url":null,"abstract":"This paper proposes the design of a tri-band AIS1, AIS2 and DCS VHF Receiver. Original highly integrated and single path RF front-end is defined by replacing conventional analog mixers with a Sample and Hold circuit for frequency downconversion. Detailed system level design based on RF-subsampling theory allowed the choice of an optimized sampling frequency of 48.93 MHz for the three radio bands by considering anti-aliasing and noises constraints. The receiver design is based on commercial components with relaxed characteristics. Simulation results with ADS models for selected components shows good performances with an SNR degradation of 7 dB.","PeriodicalId":154100,"journal":{"name":"2009 Second International Workshop on Cognitive Radio and Advanced Spectrum Management","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133926798","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
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