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检索条件"主题词=detection algorithms"

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BDD based detection algorithm for XOR-type logic

BDD based detection algorithm for XOR-type logic

引用

International Conference on Communication Technology (ICCT)

作者： Fei Sun Yinshui Xia Institute of Circuits and Systems Ningbo University Zhejiang China

Based on the characteristics study of binary decision diagrams (BDDs) of logic functions, a method using the characteristic triangle (CT) to detect logic functions suitable for XOR logic implementation is presented and a corresponding algorithm is developed. The proposed algorithm is implemented in C and tested on MCNC benchmarks. The experimental results show that the proposed algorithm is efficient compared with published results.

关键词： Binary decision diagrams detection algorithms Boolean functions Logic functions Data structures Logic circuits Reactive power Logic design Sun Circuits and systems

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Research on detection Algorithm of Multi-Class Telephone Signal Tones

Research on Detection Algorithm of Multi-Class Telephone Sig...

引用

2008 International Conference on Audio，Language and Image Processing(2008国际声音、语言、图像过程大会)

作者： Shan Zhong Weiqiang Zhang Jia Liu Department of Electronic Engineering Tsinghua University Beijing 100084 China

This paper not only proposes the detection algorithm of traditional ring signal tones, but also researches the Color Ring Back Tone which is well popular recent years. Different testing methods are given according to the difference of music color ring tone and voice prompt color ring tone. Tested on RMTS (Real-world Multi-channel Telephone Speech) database, experiments show that the detection rates of ring tone, music color ring tone, voice prompt color ring tone and virtual speech reach 100%, 98.5%, 98% and 97.5% respectively, 98.5% totally.

关键词： Music Speech Training detection algorithms Color Testing Speech recognition

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detection Algorithm for Hybrid Space-Time and Spatial Multiplexing Wireless Communications Systems

Detection Algorithm for Hybrid Space-Time and Spatial Multip...

引用

International Conference on Electronics, Communications and Computers (CONIELECOMP)

作者： Joaquín Cortez Miguel Bazdresch Deni Torres Ramón Parra ITSON University Cd. Obregón México ITESO University Guadalajara México CINVESTAV Zapopan Mexico CINVESTAV-GDL Zapopan México

In this paper we propose a new architecture for detection of hybrid layered space-time block codes (LSTBC). The proposed receiver is based on a successive interference cancellation (SIC) scheme and the QR decomposition, which leads to a suitable hardware implementation. It was designed for zero-forcing (ZF) criterion; reduced complexity is achieved by means of an adequate rearrangement of the channel matrix elements. Simulation results show that this new architecture outperforms similar, recently reported detectors in terms of bit error rate under spatially correlated channels.

关键词： detection algorithms Wireless communication Transmitters MIMO Receiving antennas Transmitting antennas Block codes Matrix decomposition Space time codes Computer architecture

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A Novel Algorithm of Blind detection of Frequency Hopping Signal Based on Second-Order Cyclostationarity

A Novel Algorithm of Blind Detection of Frequency Hopping Si...

引用

Congress on Image and Signal Processing, CISP

作者： Haining Fan Ying Guo Yaohua Xu

An algorithm to blindly detect frequency hopping (FH) signals corrupted by white Gaussian noise (WGN) is presented. Any parameters of FH are assumed to be unknown, and the noise power can be either known or unknown. The algorithm is based on the difference in cyclostationarity (CS) between FH signal and WGN. The module of estimation of cyclic autocorrelation is picked up with available received signal as the test statistic. A WGN of which power equals to the average power of received signal is constructed at the received end, and then the maximum module of estimation of cyclic autocorrelation is computed with this WGN as the detection threshold. Simulation results have proved that the proposed algorithm is adequate to the environments in which signal-to-noise ratio (SNR) is higher than -3dB.

关键词： Frequency Autocorrelation Signal processing algorithms Signal detection detection algorithms Signal processing Power engineering and energy Testing Signal analysis Radio communication countermeasures

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A study on scene change detection in H.264/AVC videos

A study on scene change detection in H.264/AVC videos

引用

IEEE Signal Processing and Communications Applications (SIU)

作者： Sevtap Kustutan Aylin Kantarci Bilgisayar Muhendisligi Bolumu Ege Universitesi Izmir Turkey

This study focuses on testing and improving the available scene change detection methods developed for bit streams compressed with the latest coding standard H.264/AVC.

关键词： Videos Transform coding Automatic voltage control detection algorithms Art Video coding Testing

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A Novel Reputation Model for Malicious Node detection in Wireless Sensor Network

A Novel Reputation Model for Malicious Node Detection in Wir...

引用

International Conference on Wireless Communications, Networking and Mobile Computing (WiCom)

作者： Guisheng Yin Guang Yang Yang Wu Xiang Yu Dongmei Zuo College of Computer Science and Technology Harbin Engineering University Harbin Heilongjiang China Information Security Research Center Harbin Engineering University Harbin Heilongjiang China

With the development of WSNs in the military and commercial fields, the security of WSNs is becoming more and more important. The security threats of wireless sensor networks (WSNs) come from not only the attacks of external attackers but also the byzantine behaviors and selfish behaviors of internal nodes. The classical security mechanisms, namely cryptography and authentication, can prevent some outsider attacks, however, they are noneffective to the attacks and the anomaly behaviors of internal nodes. A reputation-based model for malicious node detection in WSNs is proposed in this paper. In this model, the beta distribution is used to describe the reputation distribution, and the indirect reliability of third-party nodes is introduced. The simulation results show that the proposed model has better performance in terms of resisting the malicious deceit behaviors of high credit-grade nodes.

关键词： Wireless sensor networks Educational institutions Computer science Routing Information security Condition monitoring detection algorithms Military computing Computer security Cryptography

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detection of QRS Complexes Based on Biorthogonal Spline Wavelet

Detection of QRS Complexes Based on Biorthogonal Spline Wave...

引用

International Symposium on Information Science and Engineering, ISISE

作者： Xiuyu Zheng Zhen Li LinLin Shen Zhen Ji Texas Instruments DSPs Laboratory Shenzhen University Shenzhen China College of Information Engineering Shenzhen University Shenzhen China

Biorthogonal spline wavelet is used to detect the QRS complex of ECG signal. Mallat algorithm is applied in the decomposition of ECG signal by using the equivalent filter of a biorthogonal spline wavelet. Lipschitz exponent is introduced to investigate the relationship between the signal singularity (R Peak) and the zero-crossing point of the modulus maximum pair of the signal's wavelet transform. Adaptive threshold, refractory period and expiating are applied to improve the anti-interference performance. Experimental results demonstrated that this method is robust against time varying characteristics of QRS complex and noise. A correct detection rate of 99.905% has been achieved when the MIT-BIH arrhythmia database is used to test the proposed QRS complex detection algorithm.

关键词： Spline Electrocardiography Filters Instruments Digital signal processing Wavelet transforms Noise robustness Databases detection algorithms Signal analysis

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Joint Iterative detection for Multi-Code MIMO-OFCDM Systems

Joint Iterative Detection for Multi-Code MIMO-OFCDM Systems

引用

IEEE International Conference on Circuits and Systems for Communications (ICCSC)

作者： Yiqing Zhou Tung-Sang Ng Department of Electrical and Electronic Engineering University of Hong Kong Hong Kong China

This paper investigates a two-dimensionally spread orthogonal frequency and code division multiplexing (OFCDM) system with multi-code transmission and multiple input multiple output (MIMO) multiplexing, where desired data signals are interfered by not only co-channel signals from other transmit antennas (or multi-antenna interference (MAI)), but also multi- code interference (MCI) from other code channels on the same antenna. Combining the iterative detection in the space domain and the hybrid MCI cancellation and minimum mean square error (MMSE) detection in the frequency domain, a joint iterative detection algorithm is proposed to cancel out MAI and MCI. For the 0 th loop of the joint iterative detection, a 2-stage hybrid detection is needed in the frequency domain, while for later loops, a 0-stage hybrid detection or pure MMSE is sufficient. The system performance improves as the number of loops in the joint iterative detection increases. Moreover, using joint iterative detection, larger frequency diversity gain can be achieved and the performance improves as the frequency domain spreading factor increases.

关键词： Frequency domain analysis Code division multiplexing OFDM MIMO Transmitting antennas Multiple access interference Mean square error methods detection algorithms System performance Frequency diversity

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Real-Time Fade detection in Compressed Domain

Real-Time Fade Detection in Compressed Domain

引用

Congress on Image and Signal Processing, CISP

作者： Zhengming Li Huifang Qu Jin Zhang Industry Training Centre Guangdong Polytechnic Normal University Guangzhou China Department of Economics & Management South of China Normal University Guangzhou China

A fast and effective fade detection algorithm is proposed in this paper, which directly operates in compressed domain and suitable for real-time implementation. By analyzing the prediction directions of B frames, which are revealed in the macroblock types, the candidate fades can be found. Then, uncommon intracoded macroblocks of the P frame can be applied as an indicator of fade. As a result, locating fades are operated by a sliding window. Extensive experiments illustrate that the proposed algorithm achieves superiority measured by recall and precision rates, providing a useful technique for fast and on-line video content processing.

关键词： Solids Layout Industrial training detection algorithms Algorithm design and analysis Signal processing algorithms Image coding Management training Video sequences Histograms

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A Distributed Algorithm for Critical Area detection in Satellite Imagery

A Distributed Algorithm for Critical Area Detection in Satel...

引用

International Symposium on Symbolic and Numeric algorithms for Scientific Computing (SYNASC)

作者： Razvan Alecsandrescu Florin Pop Valentin Cristea Faculty of Automatics and Computer Science University Politehnica of Bucharest Romania

This paper presents a distributed algorithm for critical area detection in satellite imagery. The detection of critical area is very important in natural disaster detection and control. The algorithm uses the distributed change detection methods for multiple spectral bands in satellite images and combines changes which have appeared during a period of time. The result shows a critical area for analyzed time interval. The algorithm is distributed for support a large amount of data. The distributed approach shows a decrease in processing time with the increase of the number of workers. The presented algorithm represents a component from MedioGRID system, which implemented a real-time satellite image processing system for extracting relevant environmental and meteorological parameters on Grid systems. The critical area detection application will be integrated in Grid environments.

关键词： Distributed algorithms Satellites Change detection algorithms Clustering algorithms Earthquakes detection algorithms Grid computing Iterative algorithms Image processing MODIS

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