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2012 International Conference on Emerging Technologies for Information Systems, Computing, and Management, ICM 2012

作者： Yan, Fangmin Li, Ming You, Ling Science and Technology on Blind Signal Processing Laboratory Chengdu China

ISBN: (纸本)9781461470090

This paper proposed a new algorithm for burst signal sorting. The proposed algorithm can be used to identify and locate TDMA users based on the continuity of carrier phase. In the proposed algorithm, the continuity of carrier phase between TDMA burst signals is evaluated according to their frequency deviations, initial phases and initial positions. Then burst signals are sorted based on their degree of continuity. The proposed algorithm is effective when researchers do not know the information which the burst carries. Some simulations and experiments in this paper show that the accurate rate of the proposed sorting algorithm is greater than 0.9 when the ES/N0 > 6 dB. Specially, and the performance is stable when the frequency deviation changes. © 2013 Springer science+Business Media New York.

关键词： Time division multiple access

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Size estimation of space target using cross-range profile 3

Size estimation of space target using cross-range profile

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2013 3rd International Conference on Computer science and Network technology, ICCSNT 2013

作者： Li, Long Sun, Tao Sun, Zhengbo Science and Technology on Blind Signal Processing Laboratory Chengdu China

ISBN: (纸本)9781479905614

The size estimation of space target is useful to help monitor the collision of space targets. The traditional methods cannot obtain accurate size of three-axis stabilized targets via narrow-band radar. This paper presents a new algorithm based on cross-range profile. Through single range cell motion compensation and cross-range scaling, we can finally make the estimation of cross-range length. Simulation results verify the effectiveness of the algorithm. © 2013 IEEE.

关键词： Motion compensation

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A new adaptive time delay estimation algorithm based on MMSE criterion

A new adaptive time delay estimation algorithm based on MMSE...

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2013 IEEE International Conference on Signal processing, Communications and Computing, ICSPCC 2013

作者： Liang, Qiao Hui, Zheng National Key Laboratory of Science and Technology on Blind Signal Processing Chengdu China

ISBN: (纸本)9781479910274

In this paper, we adress the problem of time delay estimation between signals received at two spatially separated sensors at low signal-to-noise ration levels. By replacing the instantaneous square error in ETDE with time mean of square error as the cost function, we develop a new adaptive time delay estimation algorithm based on MMSE criterion (MMSE-TDE). The proposed algorithm significantly improve the performance at low SNRs, while it has the same convergence speed with the traditional ETDE algorithm. Convergence analysis is given and simulation results are also included to validate the performance of the MMSE-TDE. © 2013 IEEE.

关键词： Cost functions

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Secure Communications for Two-Way Relay Networks Via Relay Chatting

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Communications and Network 2013年第3期5卷 42-47页

作者： Jun Xiong Dongtang Ma Chunguo Liu Xin Wang National Key Laboratory of Blind Signals Processing Chengdu China School of Electronic Science and Engineering National University of Defense Technology Changsha China

In this paper, we investigate a two-way relay network consisting of two sources, multiple cooperative relays and an eavesdropper. To enhance secure communications, a new relay chatting based on transmission scheme is proposed. Specifically, the proposed scheme selects a best relay that maximize the sum mutual information among the sources to forward the sources’ signals using an amplify-and-forward protocol, and the remaining relays transmit interference signals to confuse the eavesdropper via distributed beam forming. It can be found that the proposed scheme with relay chatting does not require the knowledge of the eavesdropper’s channel, and outperforms the joint relay and jammer selection scheme, which introduces the interference into the sources. Numerical results show that the secrecy outage probability of the proposed scheme converges to zero as the transmit power increases.

关键词： Two-way Relay Networks Physical Layer Security Relay Chatting

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Secure Communications for Two-Way Relay Networks Via Relay Chatting

Secure Communications for Two-Way Relay Networks Via Relay C...

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The 9th International Conference on Wireless Communications,Networking and Mobile Computing(WICOM 2013)

作者： Jun Xiong Dongtang Ma Chunguo Liu Xin Wang School of Electronic Science and Engineering National University of Defense Technology National Key Laboratory of Blind Signals Processing

In this paper, we investigate a two-way relay network consisting of two sources, multiple cooperative relays and an eavesdropper. To enhance secure communications, a new relay chatting based on transmission scheme is proposed. Specifically, the proposed scheme selects a best relay that maximize the sum mutual information among the sources to forward the sources' signals using an amplify-and-forward protocol, and the remaining relays transmit interference signals to confuse the eavesdropper via distributed beam forming. It can be found that the proposed scheme with relay chatting does not require the knowledge of the eavesdropper's channel, and outperforms the joint relay and jammer selection scheme, which introduces the interference into the sources. Numerical results show that the secrecy outage probability of the proposed scheme converges to zero as the transmit power increases.

关键词： Two-way Relay Networks Physical Layer Security Relay Chatting

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Dual-station Geolocation Using TDOA and GROA of a Known Altitude Object

Dual-station Geolocation Using TDOA and GROA of a Known Alti...

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International Conference on Computer science and Network technology

作者： Yang Lei Jingmin Cao Wenzhong Qu Hewen Wei Jian Yu Science and Technology On Blind Signal Processing Laboratory

ISBN: (纸本)9781479905607

Passive source location attracts a growing interest due to its usefulness in various applications such as wireless communications, microphone arrays, sensor networks and so on. This paper combines the time differences of arrival (TDOA) and gain ratios of arrival (GROA) techniques to present a novel dual-station source location method of a known altitude object in 3D space. The closed form solution and performance evaluation are also given in the following section. The final simulation shows that the proposed method is feasible when the constraint height error is small and can reach the CRLB. GDOP analysis shows that the error is large on the midperpendicular line of the two stations.

关键词： Dual-station geolocation Gain Ratios Of Arrival (GROA) Time Differences Of Arrival (TDOA) CRLB GDOP

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A brain-computer interface test-bench based on EEG signals for research and student training

A brain-computer interface test-bench based on EEG signals f...

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2013 1st IEEE Symposium on Computational Intelligence in Healthcare and e-Health, CICARE 2013 - 2013 IEEE Symposium Series on Computational Intelligence, SSCI 2013

作者： Raif, Pawel Mahmud, Mufti Hussain, Amir Klos-Witkowska, Aleksandra Suchanek, Renata Dept. of Biosensors and Biomedical Signals Processing Silesian University of Technology Gliwice Poland NeuroChip Laboratory University of Padova Padova Italy Division of Computing Science and Maths University of Stirling United Kingdom Department of Electrical Engineering and Automation University of Bielsko-Biala Bielsko-Biala Poland Department of Medical Genetics Medical University of Silesia Sosnowiec Poland

The paper describes a test-bench model for braincomputer interface research based on EEG signals. The test-bench is going to be used for students training and education. The goal is to prepare modern Brain-Computer In... 详细信息

ISBN: (纸本)9781467358835

关键词： Brain computer interface

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The observability analysis of aerial moving target location based on dual-satellite geolocation system

The observability analysis of aerial moving target location ...

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2012 International Conference on Computer science and Information processing, CSIP 2012

作者： Deng, Bing Xiong, Jinyu Xia, Changxiong Science and Technology on Blind Signal Processing Laboratory Chengdu China

ISBN: (纸本)9781467314114

Dual-satellite geolocation system is an effective passive location technique. This method can locate a stationary emitter on Earth by using time and frequency differences of arrival (TDOA/FDOA).In this paper, the rank of the observation matrix was proposed as standards of location observability, established location models, analysed the observability of aerial moving target location with the representative motion, such as uniform linear model and maneuvering turn model. Finally, simulation results presented a conclusion that Dual-satellite geolocation system could implement location for aerial moving target under some restrictions. In this paper, the rank of the observation matrix was proposed as standards of location observability, established location models, analysed the observability of aerial moving target location with the representative motion, such as uniform linear model and maneuvering turn model. Finally, simulation results presented a conclusion that Dual-satellite geolocation system could implement location for aerial moving target under some restrictions. © 2012 IEEE.

关键词： Observability

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Weighted constrained total least-square algorithm for source localization using TDOA measurements

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2011 International Conference on Future Wireless Networks and Information Systems, ICFWI 2011

作者： Jing-Min, Cao He-Wen, Wei Jian, Yu Science and Technology on Blind Signal Processing Laboratory Chengdu 610041 China

ISBN: (纸本)9783642273223

A weight constrained total least-square (WCTLS) is developed for source localization by using time difference of arrival (TDOA) measurements. The WCTLS algorithm not only exploits the structure information of the measurement matrix, but also utilizes the prior knowledge of the TDOA measurements. The bias and covariance of the proposed WCTLS algorithm are also analyzed. Simulation results show that the proposed estimator achieves better performance than that of the constrained total least square, and it attains the Cramer-Rao lower bound at a sufficiently low noise level. © 2012 Springer-Verlag GmbH.

关键词： Time difference of arrival

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Semantic social network analysis with text corpora

Semantic social network analysis with text corpora

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16th Pacific-Asia Conference on Advances in Knowledge Discovery and Data Mining, PAKDD 2012

作者： Yang, Dong-Mei Zheng, Hui Yan, Ji-Kun Jin, Ye Science and Technology on Blind Signal Processing Laboratory China Southwest Electronics and Telecommunication Technology Research Institute China

ISBN: (纸本)9783642302169

We present the Document-Entity-Topic (DET) model for semantic social network analysis which tries to find out the interested entities through the topics we aim at, detect groups according to the entities which concern the similar topics, and rank the plentiful entities in a document to figure out the most valuable ones. DET model learns the topic distributions by the literal descriptions of entities. The model is similar to Author-Topic (AT) model, adding the key attribute that the distribution of entities in a document is not uniform but Dirichlet allocation. We experiment on the "Libya Event" data set which is collected from the Internet. DET model increases the precision on tasks of social network analysis and gives much lower perplexity than AT model. © 2012 Springer-Verlag.

关键词： Semantic Web

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