发布求助
文献互助 智能选刊 最新文献

2010 17th International Conference on Telecommunications最新文献

筛选
英文 中文
A reconfigurable non-uniform filter bank architecture for military radio receivers 军用无线电接收机的可重构非均匀滤波器组结构
2010 17th International Conference on Telecommunications Pub Date : 2010-04-04 DOI: 10.1109/ICTEL.2010.5478659
K. G. Smitha, A. P. Vinod
{"title":"A reconfigurable non-uniform filter bank architecture for military radio receivers","authors":"K. G. Smitha, A. P. Vinod","doi":"10.1109/ICTEL.2010.5478659","DOIUrl":"https://doi.org/10.1109/ICTEL.2010.5478659","url":null,"abstract":"In this paper, we propose a reconfigurable low complexity non-uniform filter bank architecture based on the fast filter bank design for channelization in military radio receivers. The proposed method is able to reconfigure the filter bank architecture so as to adapt to non-uniform bandwidth channels of military radio signals. The flexibility in realizing multiple bandwidth channels is achieved by suitably designing the prototype filter and efficiently selecting the channels using the information from the spectrum detection unit. A nonuniform bandwidth filter bank is shown as the design example and the complexity comparison shows that our method is 58% less complex than the best known non-uniform discrete Fourier transform filter bank.","PeriodicalId":208094,"journal":{"name":"2010 17th International Conference on Telecommunications","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125200671","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
A neural approach for compensation of nonlinear distortion effect in up to 1600bps Data Communication over voice-dedicated channels 语音专用信道中高达1600bps数据通信非线性失真效应的神经补偿方法
2010 17th International Conference on Telecommunications Pub Date : 2010-04-04 DOI: 10.1109/ICTEL.2010.5478776
H. Peyvandi, A. Ebrahimi
{"title":"A neural approach for compensation of nonlinear distortion effect in up to 1600bps Data Communication over voice-dedicated channels","authors":"H. Peyvandi, A. Ebrahimi","doi":"10.1109/ICTEL.2010.5478776","DOIUrl":"https://doi.org/10.1109/ICTEL.2010.5478776","url":null,"abstract":"Data communication over Voice-dedicated (DoV) channels of wireless telecommunication networks provides possibility of transmission of bit stream obtained from speech encoder over desired channels. On the other hand, compression techniques of wireless networks, generally by vocoders, cause severe non-linear distortions to DoV systems. Indeed, it is network that compensates the distortion which is produced by its channel and produces distortion to upper system of DoV by its vocoder. In channels with minimum phase or linear one; Linear Equalizer (LE) with LMS is a quite practical solution. Even though normal channels with fading or non-minimum phase have destructive effects, equalizers with Viterbi decision device such as Maximum Likelihood Sequence Detection (MLSD) equalizer are able to compensate distortions. Nevertheless, LE and MLSD are not able to combat with the whole distortions of DoV systems, theoretically and practically. Although Decision Feedback Equalizer (DFE) is a proper choice for non-linear channels, due to its capability of non-linear modeling, but it would be preferable to improve for applications of DoV. This paper considers a neural based DFE with fast and reliable neural networks. We represent the results of proposed method for DoV in an experimental state. The final empirical results on GSM network show that proposed method is reliable for DoV systems.","PeriodicalId":208094,"journal":{"name":"2010 17th International Conference on Telecommunications","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131813864","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
Heterogeneous multiuser transmission with BEM-based limited feedback over doubly selective MIMO downlink channels 双选择性MIMO下行信道上基于bem的有限反馈异构多用户传输
2010 17th International Conference on Telecommunications Pub Date : 2010-04-04 DOI: 10.1109/ICTEL.2010.5478876
H. Nguyen-Le, T. Le-Ngoc, Loïc Canonne-Velasquez
{"title":"Heterogeneous multiuser transmission with BEM-based limited feedback over doubly selective MIMO downlink channels","authors":"H. Nguyen-Le, T. Le-Ngoc, Loïc Canonne-Velasquez","doi":"10.1109/ICTEL.2010.5478876","DOIUrl":"https://doi.org/10.1109/ICTEL.2010.5478876","url":null,"abstract":"This paper studies the problem of limited feedback design for heterogeneous multiuser transmissions over time- and frequency-selective (doubly selective) multiple-input multiple-output (MIMO) downlink channels. In limited feedback design over the channels, the discrete prolate spheroidal basis expansion model (DPS-BEM) is used as a fitting parametric model for capturing the time-variation of the multiuser downlink channels and for reducing the number of the channel parameters. The resulting dimension reduction in the channel representation, in turn, translates into a reduced feedback load of channel state information (CSI) to the base station (BS). To exploit the considerable reduction in CSI feedback load, vector quantization (VQ) of the DPS-BEM coefficients is performed at users under the assumption that perfect BEM coefficient estimation has been established by existing algorithms. The output indices of the quantized BEM coefficient vectors are assumed to be sent to the BS via error-free, zero-latency feedback links. With the quantized CSI, the block-diagonalization (BD) precoding and greedy scheduling techniques are employed for the heterogeneous multiuser transmission (i.e., users with different numbers of receive antennas and different signal-to-noise ratios). Numerical results show that the BEM-based limited feedback scheme is able to significantly alleviate the detrimental effect of outdated CSI feedback over the time-varying channels.","PeriodicalId":208094,"journal":{"name":"2010 17th International Conference on Telecommunications","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133477890","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: 2
Transmit selection for imperfect threshold-based receive MRC in Rayleigh fading channels 瑞利衰落信道中基于不完全阈值接收MRC的发射选择
2010 17th International Conference on Telecommunications Pub Date : 2010-04-04 DOI: 10.1109/ICTEL.2010.5478642
R. Radaydeh, Mohamed-Slim Alouini
{"title":"Transmit selection for imperfect threshold-based receive MRC in Rayleigh fading channels","authors":"R. Radaydeh, Mohamed-Slim Alouini","doi":"10.1109/ICTEL.2010.5478642","DOIUrl":"https://doi.org/10.1109/ICTEL.2010.5478642","url":null,"abstract":"The performance of multiple-antenna diversity systems in which the receiver combines signal replicas per threshold-based maximal ratio combining (MRC) and the transmitter uses only a single antenna according to receive combined signal strength is studied. The impact of imperfect channel estimation is considered when the received signal replicas undergo independent and flat multipath fading. The analysis is applicable for arbitrary transmit antenna selection when the multiple-antenna channels experience identically distributed and non-identically distributed Rayleigh fading conditions. New closed-form expressions for the combined SNR statistics and some performance measures are presented. The system models adopted herein and the presented analytical results can be used to study the performance of different system architectures under various channel conditions when the implementation complexity is of interest.","PeriodicalId":208094,"journal":{"name":"2010 17th International Conference on Telecommunications","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133863081","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
Reduction of electromagnetic interference by means of frequency selective devices 用频率选择装置减少电磁干扰
2010 17th International Conference on Telecommunications Pub Date : 2010-04-04 DOI: 10.1109/ICTEL.2010.5478745
R. Stefanelli, D. Trinchero
{"title":"Reduction of electromagnetic interference by means of frequency selective devices","authors":"R. Stefanelli, D. Trinchero","doi":"10.1109/ICTEL.2010.5478745","DOIUrl":"https://doi.org/10.1109/ICTEL.2010.5478745","url":null,"abstract":"This paper introduces an efficient approach to lower the reciprocal disturbance between indoor and outdoor environments, by using frequency selective surfaces, specifically designed in order to widen the radiofrequency attenuation through housing apertures, without cancelling visible light transmission. The identified solution can be manufactured by means of inexpensive and massive industrial processes, it can be easily installed and the design procedure can be efficiently adapted to any case of application. Some simulations and experimental data are reported, confirming the validity of the proposed approach.","PeriodicalId":208094,"journal":{"name":"2010 17th International Conference on Telecommunications","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114602842","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
Enhanced cooperative collision avoidance in sudden vehicle braking scenarios 增强车辆突然制动场景下的协同防撞能力
2010 17th International Conference on Telecommunications Pub Date : 2010-04-04 DOI: 10.1109/ICTEL.2010.5478818
A. Fawaz, H. Artail
{"title":"Enhanced cooperative collision avoidance in sudden vehicle braking scenarios","authors":"A. Fawaz, H. Artail","doi":"10.1109/ICTEL.2010.5478818","DOIUrl":"https://doi.org/10.1109/ICTEL.2010.5478818","url":null,"abstract":"This paper describes a vehicle-to-vehicle safety communication protocol to improve accident prevention from sudden car braking. We are encouraged by recent work on inter-vehicle communications that studies the importance of enhancing vehicle and occupant safety through forwarding packets that contain information about road traffic and accidents. Our work involves the design and implementation of a protocol that works by combining braking and lane-changing maneuvering around the braking car to offer better results relative to recent work in terms of collision rate reduction. We used the TraNS vehicle network simulators to implement the protocol and generate results that verify its effectiveness and improved performance.","PeriodicalId":208094,"journal":{"name":"2010 17th International Conference on Telecommunications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114423645","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
Harmonic and intermodulation performance of dual-electrode Mach-Zehnder electro-optic modulators with multicarrier RF input 多载波射频输入双电极马赫-曾德尔电光调制器的谐波和互调性能
2010 17th International Conference on Telecommunications Pub Date : 2010-04-04 DOI: 10.1109/ICTEL.2010.5478864
M. Abuelma'atti
{"title":"Harmonic and intermodulation performance of dual-electrode Mach-Zehnder electro-optic modulators with multicarrier RF input","authors":"M. Abuelma'atti","doi":"10.1109/ICTEL.2010.5478864","DOIUrl":"https://doi.org/10.1109/ICTEL.2010.5478864","url":null,"abstract":"Large signal analysis of the dual-electrode Mach-Zender modulator (DE-MZM) is presented and closed-form expressions are obtained for harmonics and intermodulation performance of the DE-MZM excited by a multi-carrier RF input signal. The special case of a DE-MZM excited by three equal-amplitude carriers is considered in detail. The results obtained show that the amplitude of the second-order components is highly sensitive to the phase bias. The results also show that for values of phase bias close to zero or 180 degrees the second-order components are dominant and for small range values around 90 degrees the odd-order components are dominant.","PeriodicalId":208094,"journal":{"name":"2010 17th International Conference on Telecommunications","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123910001","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
A note on optimum MMSE/ZF multichannel equalization delay 关于最佳MMSE/ZF多通道均衡延迟的注意事项
2010 17th International Conference on Telecommunications Pub Date : 2010-04-04 DOI: 10.1109/ICTEL.2010.5478791
H. Gazzah
{"title":"A note on optimum MMSE/ZF multichannel equalization delay","authors":"H. Gazzah","doi":"10.1109/ICTEL.2010.5478791","DOIUrl":"https://doi.org/10.1109/ICTEL.2010.5478791","url":null,"abstract":"The reconstruction delay has been, for long time, recognized a significant impact on the performance of an equalizer. Still, no proofs were given that sustain the experimental observations. In this note, we develop a formal analysis that shows that optimum equalization performance is met at a delay larger than the channel memory and smaller than the equalizer order. While it is expected that the optimum delay is larger than the channel memory, we demonstrate, here, the less intuitive fact that increasing the delay beyond the channel memory affects equalization MMSE only slightly.","PeriodicalId":208094,"journal":{"name":"2010 17th International Conference on Telecommunications","volume":"105 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123981762","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: 7
Rate-distortion modeling for scalable video coding 可扩展视频编码的率失真建模
2010 17th International Conference on Telecommunications Pub Date : 2010-04-04 DOI: 10.1109/ICTEL.2010.5478827
M. Ardestani, A. Beheshti, M. Hashemi
{"title":"Rate-distortion modeling for scalable video coding","authors":"M. Ardestani, A. Beheshti, M. Hashemi","doi":"10.1109/ICTEL.2010.5478827","DOIUrl":"https://doi.org/10.1109/ICTEL.2010.5478827","url":null,"abstract":"Scalable video coding allows for post-encoding adaptation of the coded bit stream. An appropriate ratedistortion model of the embedded bit stream can be useful for deriving closed-form relations between the parameters of the scalable encoder and the time-varying channel condition values. With a well-defined model, an adaptation mechanism can quickly update the optimal values of the encoder parameters within each transmission period, and hence, a real-time implementation may be realized. In this paper, two simple and accurate empirical (hyperbolic and exponential) models are developed for modeling the rate-distortion characteristics of a scalable video encoder based on motion-compensated temporal filtering (MCTF) and two-dimensional (spatial) discrete wavelet transform (2D-DWT). The experimental results demonstrate that the hyperbolic model has an acceptable approximation error (0.2~0.85dB) relative to the actual measurements, however, the exponential model demonstrates more error (0.75~3dB) relative to the actual measurements.","PeriodicalId":208094,"journal":{"name":"2010 17th International Conference on Telecommunications","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128515656","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: 13
CERA: A Channel Estimation Reconfigurable Architecture CERA:信道估计可重构体系结构
2010 17th International Conference on Telecommunications Pub Date : 2010-04-04 DOI: 10.1109/ICTEL.2010.5478854
Céline Azar, M. Ojail, S. Chevobbe, R. David
{"title":"CERA: A Channel Estimation Reconfigurable Architecture","authors":"Céline Azar, M. Ojail, S. Chevobbe, R. David","doi":"10.1109/ICTEL.2010.5478854","DOIUrl":"https://doi.org/10.1109/ICTEL.2010.5478854","url":null,"abstract":"In this paper, a new reconfigurable processor for channel estimation in Orthogonal Frequency Division Multiplexing systems (OFDM) is proposed. The channel estimation algorithms are discussed and compared following the computational complexity criteria and the signal performances. Some representative algorithms are chosen to illustrate the different techniques of channel estimation, and are implemented. The processor CERA (Channel Estimation Reconfigurable Architecture) offers a wide flexibility and can manage the arithmetic operations of the channel estimation algorithms, in addition to those of other functionalities of the baseband OFDM system. It is compared, in terms of silicon area and power consumption, with other dedicated units in order to estimate the processor flexibility overhead.","PeriodicalId":208094,"journal":{"name":"2010 17th International Conference on Telecommunications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130062337","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
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信