Pub Date : 2010-05-23DOI: 10.1109/ICC.2010.5502567
A. Kabashi, J. Elmirghani
This study introduces a new concept of using data and storage management techniques to boost the reliability of challenged ad hoc and sensor networks by mitigating the effects of link and graph connectivity outages. Novel distributed uniform and multi-rate storage management approaches are proposed and through proper modeling of the stochastic disconnectivity patterns, network heterogeneity degrees, data resolution thresholds and various network design parameters, this work shows how these techniques can improve the overall network performance. Both analytical and simulation results are presented and various sensitivities are thoroughly investigated to give the network designer solid guidelines.
{"title":"Novel Distributed Multirate Data and Storage Management as a Reliability Booster for Challenged Ad-Hoc and Sensor Networks","authors":"A. Kabashi, J. Elmirghani","doi":"10.1109/ICC.2010.5502567","DOIUrl":"https://doi.org/10.1109/ICC.2010.5502567","url":null,"abstract":"This study introduces a new concept of using data and storage management techniques to boost the reliability of challenged ad hoc and sensor networks by mitigating the effects of link and graph connectivity outages. Novel distributed uniform and multi-rate storage management approaches are proposed and through proper modeling of the stochastic disconnectivity patterns, network heterogeneity degrees, data resolution thresholds and various network design parameters, this work shows how these techniques can improve the overall network performance. Both analytical and simulation results are presented and various sensitivities are thoroughly investigated to give the network designer solid guidelines.","PeriodicalId":6405,"journal":{"name":"2010 IEEE International Conference on Communications","volume":"12 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2010-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83639597","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 : 2010-05-23DOI: 10.1109/ICC.2010.5502786
M. Yabusaki, Y. Okumura, M. Tamura
This paper proposes a general architecture for the Next Mobile Network (NMN). NMN is composed of four planes: Advanced Mobile Access (AMA), Optical Mobile Network (OMN), Virtual Mobile Network (VMN), and Service Delivery Network (SDN). AMA, OMN, and VMN are revolutionary additions while SDN is an enhancement of that found in the All-IP network as SDP (Service Delivery Platform). NMN aims at offering sophisticated services along three service directions, "Multimedia", "Ubiquitous", and "Global". This paper describes the research being done on key NMN component technologies, e.g., advanced radio transmission, mobility management over the optical and virtual network, and ubiquitous service management.
本文提出了下一代移动网络(NMN)的通用架构。NMN由AMA (Advanced Mobile Access)、OMN (Optical Mobile Network)、VMN (Virtual Mobile Network)和SDN (Service Delivery Network)四个平面组成。AMA、OMN和VMN是革命性的增加，而SDN是全ip网络作为SDP(服务交付平台)的增强。NMN以“多媒体”、“泛在”、“全球”三大服务方向为目标，提供完善的服务。本文介绍了NMN关键组件技术的研究进展，如先进无线电传输、光与虚拟网络的移动性管理、泛在业务管理等。
{"title":"Next Mobile Network Architecture","authors":"M. Yabusaki, Y. Okumura, M. Tamura","doi":"10.1109/ICC.2010.5502786","DOIUrl":"https://doi.org/10.1109/ICC.2010.5502786","url":null,"abstract":"This paper proposes a general architecture for the Next Mobile Network (NMN). NMN is composed of four planes: Advanced Mobile Access (AMA), Optical Mobile Network (OMN), Virtual Mobile Network (VMN), and Service Delivery Network (SDN). AMA, OMN, and VMN are revolutionary additions while SDN is an enhancement of that found in the All-IP network as SDP (Service Delivery Platform). NMN aims at offering sophisticated services along three service directions, \"Multimedia\", \"Ubiquitous\", and \"Global\". This paper describes the research being done on key NMN component technologies, e.g., advanced radio transmission, mobility management over the optical and virtual network, and ubiquitous service management.","PeriodicalId":6405,"journal":{"name":"2010 IEEE International Conference on Communications","volume":"49 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2010-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90674142","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 : 2010-05-23DOI: 10.1109/ICC.2010.5502082
M. Senst, G. Ascheid, Helge Lüders
Recently, MIMO detectors which are based on Markov Chain Monte Carlo (MCMC) simulation techniques have been proposed as alternatives to, e.g., the well-known sphere detector. In this paper, we present a systematic analysis of the performance of MCMC detectors. We study the impact of several parameters such as the list size and the number of independently running chains. As a performance criterion, our analysis is based on the mutual information over an equivalent modulation channel, rather than on coded bit error rates, because this metric is independent of the outer channel code and provides valuable insights over the whole SNR range of interest. Furthermore, we show that combining the MCMC detector with a hard-output sphere detector removes the error floor at high SNR, which is a well-known problem of the MCMC principle.
{"title":"Performance Evaluation of the Markov Chain Monte Carlo MIMO Detector based on Mutual Information","authors":"M. Senst, G. Ascheid, Helge Lüders","doi":"10.1109/ICC.2010.5502082","DOIUrl":"https://doi.org/10.1109/ICC.2010.5502082","url":null,"abstract":"Recently, MIMO detectors which are based on Markov Chain Monte Carlo (MCMC) simulation techniques have been proposed as alternatives to, e.g., the well-known sphere detector. In this paper, we present a systematic analysis of the performance of MCMC detectors. We study the impact of several parameters such as the list size and the number of independently running chains. As a performance criterion, our analysis is based on the mutual information over an equivalent modulation channel, rather than on coded bit error rates, because this metric is independent of the outer channel code and provides valuable insights over the whole SNR range of interest. Furthermore, we show that combining the MCMC detector with a hard-output sphere detector removes the error floor at high SNR, which is a well-known problem of the MCMC principle.","PeriodicalId":6405,"journal":{"name":"2010 IEEE International Conference on Communications","volume":"50 29 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2010-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89815108","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 : 2010-05-23DOI: 10.1109/ICC.2010.5502065
N. Chatzidiamantis, H. Sandalidis, G. Karagiannidis, M. Matthaiou
In this paper, we propose the Inverse Gaussian (IG) distribution, as a less complex alternative to Log-normal (LN), to describe turbulence-induced fading in free-space optical (FSO) systems operating in weak turbulence conditions and/or in the presence of a large amount of aperture averaging. By conducting goodness of fit tests, we define the range of values of the scintillation index, where the two distributions approximate each other, with a certain significance level. The efficiency of the new model is pointed out by deriving analytical expressions for the calculation of the bit-error rate of two typical FSO systems; an intensity-modulation/direct detection FSO system with M-ary pulse position modulation and a heterodyne FSO system with differential phase shift keying. Numerical examples are provided to clearly illustrate the accuracy of the proposed approach in the weak turbulence regime.
{"title":"A Simple Statistical Model for Turbulence-Induced Fading in Free-Space Optical Systems","authors":"N. Chatzidiamantis, H. Sandalidis, G. Karagiannidis, M. Matthaiou","doi":"10.1109/ICC.2010.5502065","DOIUrl":"https://doi.org/10.1109/ICC.2010.5502065","url":null,"abstract":"In this paper, we propose the Inverse Gaussian (IG) distribution, as a less complex alternative to Log-normal (LN), to describe turbulence-induced fading in free-space optical (FSO) systems operating in weak turbulence conditions and/or in the presence of a large amount of aperture averaging. By conducting goodness of fit tests, we define the range of values of the scintillation index, where the two distributions approximate each other, with a certain significance level. The efficiency of the new model is pointed out by deriving analytical expressions for the calculation of the bit-error rate of two typical FSO systems; an intensity-modulation/direct detection FSO system with M-ary pulse position modulation and a heterodyne FSO system with differential phase shift keying. Numerical examples are provided to clearly illustrate the accuracy of the proposed approach in the weak turbulence regime.","PeriodicalId":6405,"journal":{"name":"2010 IEEE International Conference on Communications","volume":"51 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2010-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91288667","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 : 2010-05-23DOI: 10.1109/ICC.2010.5502657
A. Gadkar, S. Subramaniam
An all-optical approach to achieve finer bandwidth granularity is to time division multiplex low capacity circuits on each wavelength channel and to switch time-wavelength slots within the network. In such a Time-Wavelength-Switched- Network (TWSN), the Time-Wavelength-Space-Routers (TWSRs) are configured to change their routing pattern on a time slot basis. Another kind of time slotted network proposed in the literature is the Time-Wavelength-Interleaved Network (TWIN), which eliminates time switching within the network by using a non-reconfigurable core and an intelligent edge utilizing a fast tunable laser to emulate fast switching. A drawback of the TWIN network is that it assigns a unique wavelength to each node in the network. Thus it requires a total of W = N wavelengths for an N-node network and hence is not scalable. In this paper we propose to design a wavelength-constrained (i.e., W < N) TWIN network with no switching (TWIN-NS) by using a multicasting strategy. We also propose a variant of the TWIN network which possesses switching capabilities only at the edge nodes (TWIN-ES), and compare the performances of these TWIN networks to that of the TWSN. We present integer linear programs and heuristic algorithms to solve the connection scheduling problem in the TWSN and the TWIN, and investigate the benefits of having a fast reconfigurable switch as opposed to a non-reconfigurable core.
{"title":"Connection Scheduling in Wavelength-Constrained Optical Time-Slotted Networks","authors":"A. Gadkar, S. Subramaniam","doi":"10.1109/ICC.2010.5502657","DOIUrl":"https://doi.org/10.1109/ICC.2010.5502657","url":null,"abstract":"An all-optical approach to achieve finer bandwidth granularity is to time division multiplex low capacity circuits on each wavelength channel and to switch time-wavelength slots within the network. In such a Time-Wavelength-Switched- Network (TWSN), the Time-Wavelength-Space-Routers (TWSRs) are configured to change their routing pattern on a time slot basis. Another kind of time slotted network proposed in the literature is the Time-Wavelength-Interleaved Network (TWIN), which eliminates time switching within the network by using a non-reconfigurable core and an intelligent edge utilizing a fast tunable laser to emulate fast switching. A drawback of the TWIN network is that it assigns a unique wavelength to each node in the network. Thus it requires a total of W = N wavelengths for an N-node network and hence is not scalable. In this paper we propose to design a wavelength-constrained (i.e., W < N) TWIN network with no switching (TWIN-NS) by using a multicasting strategy. We also propose a variant of the TWIN network which possesses switching capabilities only at the edge nodes (TWIN-ES), and compare the performances of these TWIN networks to that of the TWSN. We present integer linear programs and heuristic algorithms to solve the connection scheduling problem in the TWSN and the TWIN, and investigate the benefits of having a fast reconfigurable switch as opposed to a non-reconfigurable core.","PeriodicalId":6405,"journal":{"name":"2010 IEEE International Conference on Communications","volume":"32 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2010-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89578905","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 : 2010-05-23DOI: 10.1109/ICC.2010.5501938
Wei Xu, Xiaodai Dong, Wu-Sheng Lu
This paper investigates the joint precoding optimization problem for a relay-assisted multi- antenna downlink system. Aiming at multiuser sum capacity maximization, we first propose an iterative optimization algorithm which exploits quadratic programming approaches. We observe that the iterative method always yields the optimized precoding matrices which diagonalize the compound channel of the system at high SNR regimes. Inspired by this observation, we further develop an efficient source and relay precoding strategy by diagonalizing the compound channel of the backward (source-to- relay) and the forward (relay-to-destination) links. Simulation results verify the effectiveness of our proposed precoding schemes.
{"title":"Joint Optimization for Source and Relay Precoding under Multiuser MIMO Downlink Channels","authors":"Wei Xu, Xiaodai Dong, Wu-Sheng Lu","doi":"10.1109/ICC.2010.5501938","DOIUrl":"https://doi.org/10.1109/ICC.2010.5501938","url":null,"abstract":"This paper investigates the joint precoding optimization problem for a relay-assisted multi- antenna downlink system. Aiming at multiuser sum capacity maximization, we first propose an iterative optimization algorithm which exploits quadratic programming approaches. We observe that the iterative method always yields the optimized precoding matrices which diagonalize the compound channel of the system at high SNR regimes. Inspired by this observation, we further develop an efficient source and relay precoding strategy by diagonalizing the compound channel of the backward (source-to- relay) and the forward (relay-to-destination) links. Simulation results verify the effectiveness of our proposed precoding schemes.","PeriodicalId":6405,"journal":{"name":"2010 IEEE International Conference on Communications","volume":"95 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2010-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90523946","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 : 2010-05-23DOI: 10.1109/ICC.2010.5501998
Alireza Kenarsari-Anhari, L. Lampe
Bit-interleaved coded modulation (BICM) has established itself as the prevalent coded modulation scheme for wireless communication systems. There are a number of semi-analytical approaches for BICM performance analysis, all of which have limitations in terms of applicability and/or complexity. In this paper, we present a novel analytical approach to approximate the bit error rate (BER) of BICM. Our approach is unified in the sense that a (i) large class of fading channels, (ii) arbitrary labeling rules, and (iii) all common signal constellations are encompassed, and it is preferable over previous work in that we provide closed-form expressions. We also derive expressions for the asymptotic BER, which reveals the diversity order and coding gain of BICM transmission over fading channels. The accuracy of proposed analytical approximations is validated through comparison with selective simulation results.
{"title":"Error-Rate Approximations for Bit-Interleaved Coded Modulation: A Flexible Analytical Approach","authors":"Alireza Kenarsari-Anhari, L. Lampe","doi":"10.1109/ICC.2010.5501998","DOIUrl":"https://doi.org/10.1109/ICC.2010.5501998","url":null,"abstract":"Bit-interleaved coded modulation (BICM) has established itself as the prevalent coded modulation scheme for wireless communication systems. There are a number of semi-analytical approaches for BICM performance analysis, all of which have limitations in terms of applicability and/or complexity. In this paper, we present a novel analytical approach to approximate the bit error rate (BER) of BICM. Our approach is unified in the sense that a (i) large class of fading channels, (ii) arbitrary labeling rules, and (iii) all common signal constellations are encompassed, and it is preferable over previous work in that we provide closed-form expressions. We also derive expressions for the asymptotic BER, which reveals the diversity order and coding gain of BICM transmission over fading channels. The accuracy of proposed analytical approximations is validated through comparison with selective simulation results.","PeriodicalId":6405,"journal":{"name":"2010 IEEE International Conference on Communications","volume":"39 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2010-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88468663","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 : 2010-05-23DOI: 10.1109/ICC.2010.5502821
Arash Zahedi-Ghasabeh, A. Tarighat, B. Daneshrad
Reliable spectrum sensing is the key requirement for secondary users to utilize the spectrum in the absence of primary users. Given the widespread deployment of OFDM modulation in recent and future multimedia broadcasting and wireless broad-band services, reliable spectrum sensing of OFDM waveforms is of great interest for future cognitive radio systems. This paper presents a new detection method for OFDM waveforms that exploits the available embedded pilot tones without any simplifying assumption or constraints on the pilots. Analytical performance characterization is presented and supported by simulation results for both AWGN and fading channels. This study shows that the new method can improve the performance by 5dB in comparison with other feature detectors.
{"title":"Spectrum Sensing of OFDM Waveforms Using Embedded Pilot Subcarriers","authors":"Arash Zahedi-Ghasabeh, A. Tarighat, B. Daneshrad","doi":"10.1109/ICC.2010.5502821","DOIUrl":"https://doi.org/10.1109/ICC.2010.5502821","url":null,"abstract":"Reliable spectrum sensing is the key requirement for secondary users to utilize the spectrum in the absence of primary users. Given the widespread deployment of OFDM modulation in recent and future multimedia broadcasting and wireless broad-band services, reliable spectrum sensing of OFDM waveforms is of great interest for future cognitive radio systems. This paper presents a new detection method for OFDM waveforms that exploits the available embedded pilot tones without any simplifying assumption or constraints on the pilots. Analytical performance characterization is presented and supported by simulation results for both AWGN and fading channels. This study shows that the new method can improve the performance by 5dB in comparison with other feature detectors.","PeriodicalId":6405,"journal":{"name":"2010 IEEE International Conference on Communications","volume":"24 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2010-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73490786","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 : 2010-05-23DOI: 10.1109/ICC.2010.5502753
Bo Yang, Yanyan Shen, M. Johansson, X. Guan
This paper considers multiaccess control for the uplink in orthogonal-frequency-division-multiple-access (OFDMA) wireless networks. To avoid extensive information exchange with the access point in centralized approaches, we propose a distributed threshold-based scheme, where each user accesses multiple channels simultaneously based on a comparison between measured channel gains and a channel gain threshold. Each user will adapts its channel gain threshold based on local measurements of collision on each channeland the energy consumption for channel contention. The problem is formulated as a constrained non-cooperative game. We show existence and uniqueness of the Nash equilibrium. A gradient-based algorithm is proposed to update the channel gain threshold. Furthermore, the convergence of this algorithm is proved. In addition, for heterogeneous systems, our proposed scheme can maintain multiuser diversity gains considering the time-varying channel gain and energy consumption. Compared with peer distributed OFDMA schemes and random channel selection algorithms, our proposed schemes reduce overhead and achieve a higher throughput.
{"title":"Threshold-Based Multichannel Access with Energy Constraint","authors":"Bo Yang, Yanyan Shen, M. Johansson, X. Guan","doi":"10.1109/ICC.2010.5502753","DOIUrl":"https://doi.org/10.1109/ICC.2010.5502753","url":null,"abstract":"This paper considers multiaccess control for the uplink in orthogonal-frequency-division-multiple-access (OFDMA) wireless networks. To avoid extensive information exchange with the access point in centralized approaches, we propose a distributed threshold-based scheme, where each user accesses multiple channels simultaneously based on a comparison between measured channel gains and a channel gain threshold. Each user will adapts its channel gain threshold based on local measurements of collision on each channeland the energy consumption for channel contention. The problem is formulated as a constrained non-cooperative game. We show existence and uniqueness of the Nash equilibrium. A gradient-based algorithm is proposed to update the channel gain threshold. Furthermore, the convergence of this algorithm is proved. In addition, for heterogeneous systems, our proposed scheme can maintain multiuser diversity gains considering the time-varying channel gain and energy consumption. Compared with peer distributed OFDMA schemes and random channel selection algorithms, our proposed schemes reduce overhead and achieve a higher throughput.","PeriodicalId":6405,"journal":{"name":"2010 IEEE International Conference on Communications","volume":"18 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2010-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76600564","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 : 2010-05-23DOI: 10.1109/ICC.2010.5502779
Ruolin Zhou, Qian Han, Reginald L. Cooper, V. Chakravarthy, Zhiqiang Wu
In this paper, we implement and demonstrate an adaptive interference avoidance TDCS (Transform-domain Communication System) based cognitive radio via software defined radio implementation. By dynamically notching the occupied bands prior to applying IDFT, the designed cognitive radio communicates without interference to primary users and from primary users, as well as provides coexistence between primary users and secondary users. The designed system applies GNU software radio as the platform, and USRP (Universal Software Radio Peripheral) as the hardware solution. This cognitive radio is capable of detecting primary users in real time and adaptively adjusting its transmission parameters to avoid interference to primary users. Additionally, we have demonstrated that when the primary user transmission changes, the cognitive radio dynamically adjusts its transmission accordingly. We have demonstrated seamless real time video transmission between two cognitive radio nodes, while avoiding interference from primary users and interference to primary users operating in the same spectrum.
在本文中，我们通过软件定义无线电实现实现并演示了基于认知无线电的自适应干扰避免TDCS(变换域通信系统)。通过在应用IDFT之前对已占用的频段进行动态切波，所设计的认知无线电与主要用户和来自主要用户的通信无干扰，并提供主要用户和次要用户之间的共存。设计的系统采用GNU软件无线电作为平台，USRP (Universal software radio Peripheral)作为硬件解决方案。该认知无线电能够实时检测主用户并自适应调整其传输参数以避免对主用户的干扰。此外，我们已经证明，当主要用户传输发生变化时，认知无线电会相应地动态调整其传输。我们已经演示了两个认知无线电节点之间的无缝实时视频传输，同时避免了来自主用户的干扰和对在同一频谱中操作的主用户的干扰。
{"title":"A Software Defined Radio Based Adaptive Interference Avoidance TDCS Cognitive Radio","authors":"Ruolin Zhou, Qian Han, Reginald L. Cooper, V. Chakravarthy, Zhiqiang Wu","doi":"10.1109/ICC.2010.5502779","DOIUrl":"https://doi.org/10.1109/ICC.2010.5502779","url":null,"abstract":"In this paper, we implement and demonstrate an adaptive interference avoidance TDCS (Transform-domain Communication System) based cognitive radio via software defined radio implementation. By dynamically notching the occupied bands prior to applying IDFT, the designed cognitive radio communicates without interference to primary users and from primary users, as well as provides coexistence between primary users and secondary users. The designed system applies GNU software radio as the platform, and USRP (Universal Software Radio Peripheral) as the hardware solution. This cognitive radio is capable of detecting primary users in real time and adaptively adjusting its transmission parameters to avoid interference to primary users. Additionally, we have demonstrated that when the primary user transmission changes, the cognitive radio dynamically adjusts its transmission accordingly. We have demonstrated seamless real time video transmission between two cognitive radio nodes, while avoiding interference from primary users and interference to primary users operating in the same spectrum.","PeriodicalId":6405,"journal":{"name":"2010 IEEE International Conference on Communications","volume":"1 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2010-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76872780","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：