2011 International Conference on Communications and Signal Processing最新文献_第2页

An improved multiple access chaotic communication system using orthogonal chaotic vectors 一种改进的正交混沌矢量多址混沌通信系统

2011 International Conference on Communications and Signal Processing Pub Date : 2011-03-24 DOI: 10.1109/ICCSP.2011.5739404

S. Venkatesh, Poonam Singh

引用次数: 9

Generation of phase-only pencil-beam pair from concentric ring array antenna using Gravitational Search Algorithm 基于引力搜索算法的同心圆阵天线纯相位铅笔波束对生成

2011 International Conference on Communications and Signal Processing Pub Date : 2011-03-24 DOI: 10.1109/ICCSP.2011.5739343

A. Chatterjee, G. K. Mahanti, P. Mahapatra

引用次数: 16

Compression of iris images using DTCNN based Wavelet decomposition and Directional Filter Bank analysis 基于DTCNN的小波分解和方向滤波器组分析的虹膜图像压缩

2011 International Conference on Communications and Signal Processing Pub Date : 2011-03-24 DOI: 10.1109/ICCSP.2011.5739362

V. Mohan, Y. Venkataramani

{"title":"Compression of iris images using DTCNN based Wavelet decomposition and Directional Filter Bank analysis","authors":"V. Mohan, Y. Venkataramani","doi":"10.1109/ICCSP.2011.5739362","DOIUrl":"https://doi.org/10.1109/ICCSP.2011.5739362","url":null,"abstract":"In this paper, a compression scheme of iris images using Wavelet Based Directional Transform (WBDT) through Templates of Discrete Time Cellular Neural Network (DTCNN) and Directional Filter Bank (DFB) is presented. The complex annular part of the iris portion of the eye image contains many distinctive features such as arching ligaments, furrows and ridges. The compression algorithms developed for iris images have to preserve the details present in the iris part of the image, which are used for subsequent biometric processes. The directionality features can be very well analyzed by means of Directional Filter banks in WBDT than Wavelet decomposition. The decomposed image using WBDT can be coded effectively by using modified SPIHT encoding. The encoder output is further compressed using SOFM based VQ coder. The subjective quality of the reconstructed images obtained is comparable with the 2D wavelet decomposition. It is inferred that an average of 10dB improvement can be seen over wavelet based technique for the same entropy. The results obtained are tabulated and compared with those of the wavelet based ones.","PeriodicalId":408736,"journal":{"name":"2011 International Conference on Communications and Signal Processing","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123624057","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

Miniature slotted RFID tag antenna for metallic objects 用于金属物体的微型开槽RFID标签天线

2011 International Conference on Communications and Signal Processing Pub Date : 2011-03-24 DOI: 10.1109/ICCSP.2011.5739336

Apoorva Sharma, Syed Azeemuddin, A. Harish

引用次数: 13

Adaptive predistortion linearization based on orthogonal polynomial expansion for nonlinear power amplifiers in OFDM systems 基于正交多项式展开的OFDM系统非线性功率放大器自适应预失真线性化

2011 International Conference on Communications and Signal Processing Pub Date : 2011-03-24 DOI: 10.1109/ICCSP.2011.5739374

O. Muta, Isamu Kaneko, Y. Akaiwa, H. Furukawa

{"title":"Adaptive predistortion linearization based on orthogonal polynomial expansion for nonlinear power amplifiers in OFDM systems","authors":"O. Muta, Isamu Kaneko, Y. Akaiwa, H. Furukawa","doi":"10.1109/ICCSP.2011.5739374","DOIUrl":"https://doi.org/10.1109/ICCSP.2011.5739374","url":null,"abstract":"Adaptive predistorter is an effective technique to compensate for nonlinear distortion in a power amplifier. As a method to improve the parameter convergence speed in the predistorter, a series expansion technique with an orthogonal polynomials has been investigated. In this paper, we present an adaptive predistortion linearization method based on orthogonal polynomial expansion for a nonlinear power amplifier affected by memory effect in OFDM systems, where both memory and memoryless predistorter are constructed by the weighted sum of orthogonal polynomials. In addition, to achieve the parameter optimization speed improvement of the predistorter, we propose a method to determine step-size in a recursive calculation. The parameter convergence performance of the predistorter is investigated in OFDM systems with and without peak-to-average power ratio (PAPR) reduction, where the partial transmit sequence (PTS) technique is employed to reduce PAPR. Computer simulation results show that the proposed adaptive predistorter achieves faster parameter convergence time than that of non-orthogonal one in OFDM systems with nonlinear power amplifier affected by memory effect, even though PAPR of OFDM signal is reduced by using PTS. It is also confirmed that power added efficiency is further improved by combining the adaptive predistortion with PAPR reduction technique.","PeriodicalId":408736,"journal":{"name":"2011 International Conference on Communications and Signal Processing","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125567520","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

Enhancement of noisy speech signal based on variance and modified gain function 基于方差和修正增益函数的含噪语音信号增强

2011 International Conference on Communications and Signal Processing Pub Date : 2011-03-24 DOI: 10.1109/ICCSP.2011.5739290

D. Deepa, A. Vijay, D. Hema Priya, A. Shanmugam

引用次数: 9

Robust multiple target tracking under occlusion using fragmented mean shift and Kalman filter 基于碎片均值移位和卡尔曼滤波的多目标鲁棒跟踪

2011 International Conference on Communications and Signal Processing Pub Date : 2011-03-24 DOI: 10.1109/ICCSP.2011.5739376

G. Phadke

{"title":"Robust multiple target tracking under occlusion using fragmented mean shift and Kalman filter","authors":"G. Phadke","doi":"10.1109/ICCSP.2011.5739376","DOIUrl":"https://doi.org/10.1109/ICCSP.2011.5739376","url":null,"abstract":"Object tracking is critical to visual surveillance and activity analysis. The major issue in multiple visual target tracking is occlusion handling. In this paper, we investigate how to improve the robustness of visual tracking method for multiple target tracking with occlusion. Here we propose weighted fragment based mean shift with Kalman filter with the consideration of color features of the target. Discrete wavelet transform is used to detect the target automatically. Inter frame difference of LL-subband is used for detection of the target. Automatic fragments are acquired by calculating the mean and standard deviation of detected target. Here the weighted fragments are derived from the likelihood function of foreground and background of that particular fragment using color histogram. The output of weighted fragmented mean shift is updated with the help of Kalman filter. The Proposed tracking algorithm has been tested on several challenging videos of different situations and compared with mean shift method using Bhattacharyya coefficients and Bhattacharyya distance. Extensive experiments authenticate the robustness and reliability of the proposed method.","PeriodicalId":408736,"journal":{"name":"2011 International Conference on Communications and Signal Processing","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122549906","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

Comparison of single patch and patch antenna array for a microwave life detection system 微波生命探测系统中单贴片与贴片天线阵列的比较

2011 International Conference on Communications and Signal Processing Pub Date : 2011-03-24 DOI: 10.1109/ICCSP.2011.5739294

S. Shabu, M. James

{"title":"Comparison of single patch and patch antenna array for a microwave life detection system","authors":"S. Shabu, M. James","doi":"10.1109/ICCSP.2011.5739294","DOIUrl":"https://doi.org/10.1109/ICCSP.2011.5739294","url":null,"abstract":"For the rescue operation during natural calamities to be done efficiently, there must be a life detector that can provide reliable determination of a live person's presence in a place of search. Microwave sensors could bring some specific advantages for the detection of living victims. Primarily, microwaves are sensitive to small movements which are distinctive signs of life, independently of a possible loss of consciousness. It is at this juncture that microwave life detectors gain their significance. The antenna system is an integral part of microwave life rescuing system. The compactness and portability of a microwave life detection system depend largely on the miniaturization the antenna used which could be realised using micro strip patch antenna. The efficiency of the existing microwave life detection system can be raised by increasing the transmitted power and implementing appropriate digital signal processing techniques. Rapid developments in wireless communication go in parallel with advancements in compactness and efficiency of antennas. This work proposes the design of a single element microstrip patch antenna and a 1×4 microstrip patch antenna array for a microwave life detection system at 1.150 GHz. Also the directivity of the simulated patch and 1×4 patch antenna array are compared. The simulations are done in AWRDE Microwave office.","PeriodicalId":408736,"journal":{"name":"2011 International Conference on Communications and Signal Processing","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122161765","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: 12

A novel patch antenna for ultra wideband applications 一种新型的超宽带贴片天线

2011 International Conference on Communications and Signal Processing Pub Date : 2011-03-24 DOI: 10.1109/ICCSP.2011.5739318

N. S. Raghava, A. De, P. Arora, S. Malhotra, R. Bazaz, S. Kapur, R. Manocha

引用次数: 11

CMOS wide band Low Noise Amplifier with current reuse and noise cancellation 具有电流复用和噪声消除的CMOS宽带低噪声放大器

2011 International Conference on Communications and Signal Processing Pub Date : 2011-03-24 DOI: 10.1109/ICCSP.2011.5739401

P. Bindu, P. C. Subramaniam

引用次数: 1