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2015 International Conference on Communications, Signal Processing, and their Applications (ICCSPA'15)最新文献

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Performance analysis of cooperative cognitive radio networks with imperfect sensing 不完全感知协同认知无线网络性能分析
2015 International Conference on Communications, Signal Processing, and their Applications (ICCSPA'15) Pub Date : 2015-04-09 DOI: 10.1109/ICCSPA.2015.7081284
A. Homayounzadeh, M. Mahdavi
{"title":"Performance analysis of cooperative cognitive radio networks with imperfect sensing","authors":"A. Homayounzadeh, M. Mahdavi","doi":"10.1109/ICCSPA.2015.7081284","DOIUrl":"https://doi.org/10.1109/ICCSPA.2015.7081284","url":null,"abstract":"In this paper the performance of the secondary users (SUs) in an overlay cooperative cognitive radio network (CRN) with imperfect sensing is analyzed. Providing reliable communication for the SUs in CRNs requires elaborate considerations in various functionalities of the network. Here, a practical structure for the network is considered in which the cooperation among the SUs is taken into account to improve the reliability of the secondary data transmission on wireless fading channels. Furthermore, an efficient spectrum scheduling scheme is proposed which can effectively manage the data transmission for the SUs. A queueing framework is proposed to analyze the performance of the SUs in the network. Furthermore, the effects of spectrum sensing errors on the performance of the SUs are studied. The analytical results are also verified by simulations.","PeriodicalId":395644,"journal":{"name":"2015 International Conference on Communications, Signal Processing, and their Applications (ICCSPA'15)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122587425","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: 9
A proposed relay selection algorithm over Rayleigh fading channel 提出了一种瑞利衰落信道中继选择算法
2015 International Conference on Communications, Signal Processing, and their Applications (ICCSPA'15) Pub Date : 2015-04-09 DOI: 10.1109/ICCSPA.2015.7081274
A. El-Mahdy, Nada Tarek
{"title":"A proposed relay selection algorithm over Rayleigh fading channel","authors":"A. El-Mahdy, Nada Tarek","doi":"10.1109/ICCSPA.2015.7081274","DOIUrl":"https://doi.org/10.1109/ICCSPA.2015.7081274","url":null,"abstract":"In this paper a relay selection algorithm for decode and forward relaying is proposed to select one relay from multi-relay networks. Based on incremental best relay technique, the selected relay by the proposed algorithm is chosen to transmit only if the rely-to-destination link signal to noise ratio (SNR) is greater than the SNR of the source-destination. The proposed algorithm does not require cyclic redundancy check for error correction. The performance of the algorithm is evaluated in terms of bit error rate and outage probability for known and estimated channel. The performance of the proposed algorithm is compared with other existing schemes for relay selection. Channel estimation is performed by least square algorithm. Numerical results show that the proposed algorithm has better performance than some of the schemes.","PeriodicalId":395644,"journal":{"name":"2015 International Conference on Communications, Signal Processing, and their Applications (ICCSPA'15)","volume":"2007 23","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134475138","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
Secure communications with D2D cooperation 安全通信与D2D合作
2015 International Conference on Communications, Signal Processing, and their Applications (ICCSPA'15) Pub Date : 2015-04-09 DOI: 10.1109/ICCSPA.2015.7081278
Samah A. M. Ghanem, Munnujahan Ara
{"title":"Secure communications with D2D cooperation","authors":"Samah A. M. Ghanem, Munnujahan Ara","doi":"10.1109/ICCSPA.2015.7081278","DOIUrl":"https://doi.org/10.1109/ICCSPA.2015.7081278","url":null,"abstract":"Device to Device (D2D) communications provides a promising technique for 5G wireless networks, supporting higher data rates. Security of data transmission over wireless clouds could put constraints on devices; whether to cooperate or not. Therefore, our aim is to provide analytical framework for the security at the physical layer and to define the constraints embodied with cooperation in wireless clouds1. In this paper, two legitimate transmitters Alice and John cooperate to increase the reliable transmission rate received by their common legitimate receiver Bob, where one eavesdropper, Eve exists. We propose a distributed algorithm that allows the devices to select whether to cooperate or not and to adapt their optimal power allocation based on the cooperation framework selected. Moreover, we define distance constraints to enforce the benefits of cooperation between devices in a wireless cloud.","PeriodicalId":395644,"journal":{"name":"2015 International Conference on Communications, Signal Processing, and their Applications (ICCSPA'15)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115012246","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: 16
Extraction of thermal workload signatures in multicore processors using least angle regression 基于最小角度回归的多核处理器热负荷特征提取
2015 International Conference on Communications, Signal Processing, and their Applications (ICCSPA'15) Pub Date : 2015-04-09 DOI: 10.1109/ICCSPA.2015.7081301
R. Karn, I. Elfadel
{"title":"Extraction of thermal workload signatures in multicore processors using least angle regression","authors":"R. Karn, I. Elfadel","doi":"10.1109/ICCSPA.2015.7081301","DOIUrl":"https://doi.org/10.1109/ICCSPA.2015.7081301","url":null,"abstract":"Performance counters (PCs) embedded in microprocessor are frequently used to characterize workload and predict thermal behavior for multicore processors. These PCs are required to be highly accurate, very compact, and tunable to workload changes in real time. Traditionally these PCs are selected using correlation map or some sort of statistical trial-error techniques. These techniques have the disadvantage of requiring the large PC set regardless of the workload type which is computationally burden when scaling number of cores in processor. In this paper, we use the more recent algorithm of least-angle regression to choose specific set of PCs for definite workload characteristic and validate its accuracy by thermal modeling. It include only those PCs most correlated with thermal behavior of workload. Such PCs are considered as signatures to predict workload characteristic and to apply specific thermal management action. The PC sets are trained and tested on model using workloads from the PARSEC and SPEC CPU 2006 benchmarks.","PeriodicalId":395644,"journal":{"name":"2015 International Conference on Communications, Signal Processing, and their Applications (ICCSPA'15)","volume":"205 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123349169","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
LTE system level performance in the presence of CQI feedback uplink delay and mobility LTE系统级性能在CQI反馈存在下的上行延迟和移动性
2015 International Conference on Communications, Signal Processing, and their Applications (ICCSPA'15) Pub Date : 2015-04-09 DOI: 10.1109/ICCSPA.2015.7081294
K. Arshad
{"title":"LTE system level performance in the presence of CQI feedback uplink delay and mobility","authors":"K. Arshad","doi":"10.1109/ICCSPA.2015.7081294","DOIUrl":"https://doi.org/10.1109/ICCSPA.2015.7081294","url":null,"abstract":"Long Term Evolution (LTE) is a promising technology for the wireless and mobile communication systems and is being commercially launched in various countries of the world. The Third Generation of Partnership Project (3GPP), through design and optimisation of new radio access techniques, is further developing the future LTE-Advanced technology to remain on the forefront of wireless technologies. However, it is still challenging in LTE to provide the desired quality of service to the users particularly in the presence of high mobility and uplink feedback delay. In this paper, the impact of Channel Quality Indicator (CQI) uplink feedback delay on the overall network performance under different scheduling algorithms and mobility patterns is discussed. We study average user equipment (UE) throughput, average cell-edge UE throughput and average cell throughput under mobility and conclude that for an efficient LTE-Advanced scheduling algorithm, UE speed and CQI feedback delay must be taken into account.","PeriodicalId":395644,"journal":{"name":"2015 International Conference on Communications, Signal Processing, and their Applications (ICCSPA'15)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123103106","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: 11
Real-time micro-vibration measurement with laser phase modulation 激光相位调制实时微振动测量
2015 International Conference on Communications, Signal Processing, and their Applications (ICCSPA'15) Pub Date : 2015-04-09 DOI: 10.1109/ICCSPA.2015.7081288
Xiaoxiang Li, Xiaofeng Zhong, Zhiping Cai, Shidong Zhou
{"title":"Real-time micro-vibration measurement with laser phase modulation","authors":"Xiaoxiang Li, Xiaofeng Zhong, Zhiping Cai, Shidong Zhou","doi":"10.1109/ICCSPA.2015.7081288","DOIUrl":"https://doi.org/10.1109/ICCSPA.2015.7081288","url":null,"abstract":"Measurement accuracy is the most important criterion for laser distance measurement. The measurement accuracy can only reach half wavelength with the laser pulse method or laser interferometer. In this paper, a micro vibration detection method is proposed with laser phase modulation, whose measurement accuracy could reach 0.0179 wavelength. And it will have a better anti-interference ability to transmit signal with 40 MHz carrier. As verified by theoretical analysis, ESG simulation and the actual laser measurement experiments, the proposed measurement method with laser phase modulation can not only meet the real-time demand, but also improve the measurement accuracy.","PeriodicalId":395644,"journal":{"name":"2015 International Conference on Communications, Signal Processing, and their Applications (ICCSPA'15)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131563422","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
Histogram-based thresholding in discrete wavelet transform for partial discharge signal denoising 基于直方图阈值的离散小波变换局部放电信号去噪
2015 International Conference on Communications, Signal Processing, and their Applications (ICCSPA'15) Pub Date : 2015-04-09 DOI: 10.1109/ICCSPA.2015.7081289
R. Hussein, K. Shaban, A. El-Hag
{"title":"Histogram-based thresholding in discrete wavelet transform for partial discharge signal denoising","authors":"R. Hussein, K. Shaban, A. El-Hag","doi":"10.1109/ICCSPA.2015.7081289","DOIUrl":"https://doi.org/10.1109/ICCSPA.2015.7081289","url":null,"abstract":"White noise is a major interference source that affects the partial discharge (PD) signal detection and recognition. Wavelet shrinkage denoising methods can efficiently reject the white noise embedded in the PD signal acquisition and measurement processes. The wavelet threshold determination is a key factor in the quality of noise suppression from signals. A novel threshold estimation technique, namely histogram-based threshold estimation (HBTE), is introduced to obtain the optimal level-dependent wavelet thresholds of noisy partial discharge signals. Unlike existing wavelet thresholding techniques, HBTE obtains two different threshold values for each wavelet subband. The proposed method is applied on measured PD signals at different noise levels. Experimental results show that the proposed thresholding approach outperforms the conventional threshold selection rules in terms of signal-to-noise ratio, cross correlation coefficient, root mean square error, and reduction in noise level.","PeriodicalId":395644,"journal":{"name":"2015 International Conference on Communications, Signal Processing, and their Applications (ICCSPA'15)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127079696","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
FPGA methodology for power analysis of embedded adaptive beamforming 嵌入式自适应波束形成功率分析的FPGA方法
2015 International Conference on Communications, Signal Processing, and their Applications (ICCSPA'15) Pub Date : 2015-04-09 DOI: 10.1109/ICCSPA.2015.7081299
O. T. Waheed, A. Shabra, I. Elfadel
{"title":"FPGA methodology for power analysis of embedded adaptive beamforming","authors":"O. T. Waheed, A. Shabra, I. Elfadel","doi":"10.1109/ICCSPA.2015.7081299","DOIUrl":"https://doi.org/10.1109/ICCSPA.2015.7081299","url":null,"abstract":"In wireless communication systems, multipath and interference effects degrade the SNR and increase the BER of received signals. Antenna arrays and beamforming algorithms are typically used to improve system performance and noise immunity. For non-adaptive beamforming where signal-path gains remain unchanged, power dissipation is predictable but SNR and BER depend on the changing statistics of the received signals. On the other hand, in adaptive beamforming where signal-path gains are changed in real time according to the statistics of the received signals, the SNR is improved and BER is decreased, but power dissipation undergoes unpredictable transients during the gain adaptation process. Such transients are especially detrimental to battery-based power management systems in mobile applications. In this paper, we propose an FPGA-based methodology for the analysis, modeling and prediction of power dissipation in embedded array signal processing systems containing adaptive beamforming components. This FPGA-based methodology enables the exploration of the adaptive beamforming design space in terms of power, timing, overhead, arithmetic precision and computational resources. A distinct feature of this methodology is that it enables such design-space exploration in real-time and on actual received waveforms. We describe a specific implementation of this methodology using a hardware prototype based on Xilinx's Virtex 7 FPGA. We use this prototype to explore the design space of a four-channel Least-Mean-Squares (LMS) beamformer. The main result of this exploration is the selection of an adaptive algorithm design point that represents the best tradeoff between parameter convergence, machine precision and energy-efficiency for the embedded array signal processor.","PeriodicalId":395644,"journal":{"name":"2015 International Conference on Communications, Signal Processing, and their Applications (ICCSPA'15)","volume":"122 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114947326","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
Boosting speaker identification performance using a frame level based algorithm 使用基于帧级的算法提高说话人识别性能
2015 International Conference on Communications, Signal Processing, and their Applications (ICCSPA'15) Pub Date : 2015-04-09 DOI: 10.1109/ICCSPA.2015.7081273
R. Djemili, M. C. A. Korba, H. Bourouba, D. O'Shaughnessy
{"title":"Boosting speaker identification performance using a frame level based algorithm","authors":"R. Djemili, M. C. A. Korba, H. Bourouba, D. O'Shaughnessy","doi":"10.1109/ICCSPA.2015.7081273","DOIUrl":"https://doi.org/10.1109/ICCSPA.2015.7081273","url":null,"abstract":"In this paper, we propose an algorithm to improve the performance of speaker identification systems. A baseline speaker identification system uses a scoring of a test utterance against all speakers' models; this could be termed as an evaluation at the observation level. In the proposed approach, and prior to the standard evaluation phase, an algorithm based on a frame level evaluation is applied. The speaker identification study is conducted using IVIE corpus and a randomly selected 120 speakers from TIMIT. Mel-frequency cepstral coefficients (MFCC) and Gaussian mixture model (GMM) are the main components in state of the art speaker identification systems and will be adopted in this work. Experimental results based on several systems with different training and testing conditions, showed that our proposed algorithm yielded to relative reduction in error rates of 24.4 and 37.3% over the baseline systems respectively for IVIE and TIMIT. The final performances reached measured by identification error rates are 3.4% and 5.2% for IVIE and TIMIT corpuses.","PeriodicalId":395644,"journal":{"name":"2015 International Conference on Communications, Signal Processing, and their Applications (ICCSPA'15)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129389205","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
Parameter estimation using antenna arrays of directional sensors 方向传感器天线阵列参数估计
2015 International Conference on Communications, Signal Processing, and their Applications (ICCSPA'15) Pub Date : 2015-04-09 DOI: 10.1109/ICCSPA.2015.7081279
H. Gazzah
{"title":"Parameter estimation using antenna arrays of directional sensors","authors":"H. Gazzah","doi":"10.1109/ICCSPA.2015.7081279","DOIUrl":"https://doi.org/10.1109/ICCSPA.2015.7081279","url":null,"abstract":"An antenna array made of non-isotropic sensors is used to estimate the parameters of an emitting source. The estimation accuracy depends on the radiation pattern of the individual sensor, and so, in a non-trivial manner. Estimation performance is evaluated in terms of the Cramer-Rao bound for which an analytical expression is found and compared to the classic case of antenna arrays of isotropic sensors. A gain function is introduced that expresses the benefit from using directional sensors. It is interpreted to derive a certain number of general conclusions, independently from the actual sensors, algorithms or array configurations.","PeriodicalId":395644,"journal":{"name":"2015 International Conference on Communications, Signal Processing, and their Applications (ICCSPA'15)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129233640","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
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