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Signal denoising using line-adaptive lifting wavelet transform 基于线自适应提升小波变换的信号去噪方法
Journal of Measurement Science and Instrumentation Pub Date : 2001-05-21 DOI: 10.1109/IMTC.2001.928301
J. Stepien, T.P. Zielinski
{"title":"Signal denoising using line-adaptive lifting wavelet transform","authors":"J. Stepien, T.P. Zielinski","doi":"10.1109/IMTC.2001.928301","DOIUrl":"https://doi.org/10.1109/IMTC.2001.928301","url":null,"abstract":"This paper describes denoising methods of 1D signals using soft thresholding of wavelet transform coefficients. Some adaptive techniques based on classical and lifting versions of the wavelet transform are implemented in software. A new method based on the line-adaptive \"update first\" lifting scheme is implemented and compared with scale-adaptive denoising based on classical and lifting wavelet transforms. The results show that the line-adaptive \"update first\" algorithm gives the best results. However, the least-squares (SNR) efficiency of all the methods is very similar. In non-adaptive techniques the denoising quality strongly depends on the proper choice of decomposition filter length according to the signal characteristics. Therefore, application of the adaptive schemes is signal independent. Computer experiments reveal that the line-adaptive \"update-first\" lifting signal denoising is characterised by very good SNR and the lowest maximum-absolute reconstruction error.","PeriodicalId":68878,"journal":{"name":"Journal of Measurement Science and Instrumentation","volume":"33 1","pages":"1386-1391 vol.2"},"PeriodicalIF":0.0,"publicationDate":"2001-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88742743","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
An efficient method to improve amplifier accuracy 一种提高放大器精度的有效方法
Journal of Measurement Science and Instrumentation Pub Date : 2001-05-21 DOI: 10.1109/IMTC.2001.928241
Z. Román, I. Zoltán
{"title":"An efficient method to improve amplifier accuracy","authors":"Z. Román, I. Zoltán","doi":"10.1109/IMTC.2001.928241","DOIUrl":"https://doi.org/10.1109/IMTC.2001.928241","url":null,"abstract":"The gain and phase error of amplifiers can be measured precisely and consequently reduced with at least one order of magnitude in the frequency range of 0...100 kHz. Better performance can be achieved in the 0...1 kHz range, where gain error can be reduced below 10 ppm. No precision component or instrument is needed. Implementation of the method is simple, inexpensive and suitable for industrial applications.","PeriodicalId":68878,"journal":{"name":"Journal of Measurement Science and Instrumentation","volume":"118 1","pages":"1055-1058 vol.2"},"PeriodicalIF":0.0,"publicationDate":"2001-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77426848","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: 0
Channel modeling based on comprehensive measurements for DVB-T mobile applications 基于DVB-T移动应用综合测量的信道建模
Journal of Measurement Science and Instrumentation Pub Date : 2001-05-21 DOI: 10.1109/IMTC.2001.928878
S. Bug, C. Wengerter, I. Gaspard, R. Jakoby
{"title":"Channel modeling based on comprehensive measurements for DVB-T mobile applications","authors":"S. Bug, C. Wengerter, I. Gaspard, R. Jakoby","doi":"10.1109/IMTC.2001.928878","DOIUrl":"https://doi.org/10.1109/IMTC.2001.928878","url":null,"abstract":"Due to the increasing interest on mobile multimedia applications with high data rate, new channel models (WSSUS-models) have to be derived, which are adapted for broadband mobile radio channels. Previously defined models (e.g. for GSM by COST 207) are not valid for systems having greater bandwidth. The presented procedure is based on measurements taken by a channel sounder applied in a regular DVB-T network in Berlin.","PeriodicalId":68878,"journal":{"name":"Journal of Measurement Science and Instrumentation","volume":"57 1","pages":"544-548 vol.1"},"PeriodicalIF":0.0,"publicationDate":"2001-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77463885","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 full switched-current S/sup 2/I second order sigma-delta modulator 全开关电流S/sup 2/I二阶σ - δ调制器
Journal of Measurement Science and Instrumentation Pub Date : 2001-05-21 DOI: 10.1109/IMTC.2001.928181
S. Boujelben, D. Dallet, P. Marchegay
{"title":"A full switched-current S/sup 2/I second order sigma-delta modulator","authors":"S. Boujelben, D. Dallet, P. Marchegay","doi":"10.1109/IMTC.2001.928181","DOIUrl":"https://doi.org/10.1109/IMTC.2001.928181","url":null,"abstract":"This paper presents a low pass sigma delta modulator for analog-to-digital conversion which uses the S/sup 2/I switched current technique. At circuit level, we propose a new differential pseudo bilinear integrator. Other building blocks such as the 1 bit digital to analogue converter and the quantizer are discussed as well. The whole modulator was implemented in a 0.6 /spl mu/m three-metal layers digital CMOS process with single 3.3 V power supply. The measured dynamic range is over 8 bits.","PeriodicalId":68878,"journal":{"name":"Journal of Measurement Science and Instrumentation","volume":"10 1","pages":"761-764 vol.2"},"PeriodicalIF":0.0,"publicationDate":"2001-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87657229","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
A vehicle classification based on inductive loop detectors 基于电感回路检测器的车辆分类
Journal of Measurement Science and Instrumentation Pub Date : 2001-05-21 DOI: 10.1109/IMTC.2001.928860
J. Gajda, R. Sroka, M. Stencel, A. Wajda, T. Zeglen
{"title":"A vehicle classification based on inductive loop detectors","authors":"J. Gajda, R. Sroka, M. Stencel, A. Wajda, T. Zeglen","doi":"10.1109/IMTC.2001.928860","DOIUrl":"https://doi.org/10.1109/IMTC.2001.928860","url":null,"abstract":"The class of vehicle is one of more important parameters in the process of road traffic measurement. Up to now, strip piezoelectric sensors and video systems have been used. The use of very cheap inductive loop detectors for vehicle classification is also possible. Such vehicle classification systems are based on magnetic profiles recorded from inductive loops. The magnetic profile is sensitive to the loop dimensions. This paper presents a discussion concerning the influence of loop length (in direction of vehicle movement) on differences between characteristics describing the magnetic profiles of the vehicles belonging to the different classes. As characteristics describing the magnetic profile of the vehicle have been used: magnetic profiles in time domain (normalized in amplitude), probability density function and magnetic profiles in vehicle length domain. For real time applications, the conversion of the measured signal into a vector of numerical parameters (a few only) is also proposed. The influence of loop dimensions on a chosen signal parameter was investigated. The case of extremely short loop (10 cm), which allows detection of the number of axles, was also analyzed.","PeriodicalId":68878,"journal":{"name":"Journal of Measurement Science and Instrumentation","volume":"45 1","pages":"460-464 vol.1"},"PeriodicalIF":0.0,"publicationDate":"2001-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87345225","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: 154
Recent advances in sensor technology 传感器技术的最新进展
Journal of Measurement Science and Instrumentation Pub Date : 2001-05-21 DOI: 10.1109/IMTC.2001.928831
H.-R. Trankler, O. Kanoun
{"title":"Recent advances in sensor technology","authors":"H.-R. Trankler, O. Kanoun","doi":"10.1109/IMTC.2001.928831","DOIUrl":"https://doi.org/10.1109/IMTC.2001.928831","url":null,"abstract":"The recent advances of sensor technologies have been powered by high-speed and low-cost electronic circuits, novel signal processing methods and innovative advances in manufacturing technologies. The synergetic interaction of new developments in these fields allow completely novel approaches increasing the performance of technical products. Innovative sensor structures have been designed permitting self-monitoring or self-calibration. The rapid progress of sensor manufacturing technologies allows the production of systems and components with a low cost-to-performance ratio. Among microsystem manufacturing technologies, surface and bulk micromachining are increasingly winning recognition. The potential in the field of digital signal processing involves new approaches for the improvement of sensor properties. Multi-sensor systems can significantly contribute to the enhancement of the quality and availability of information. For this purpose, sophisticated signal processing methods based on data fusion techniques are more effective for an accurate computation of measurement values or a decision than usually used threshold based algorithms. In this state-of-the-art lecture we give an overview of the recent advances and future development trends in the field of sensor technology. We focus on novel sensor structures, manufacturing technologies and signal processing methods in individual and multi-sensor systems. The predominantly observed future development trends are: the miniaturization of sensors and components, the widespread use of multi-sensor systems and the increasing relevance of radio wireless and autonomous sensors.","PeriodicalId":68878,"journal":{"name":"Journal of Measurement Science and Instrumentation","volume":"122 1","pages":"309-316 vol.1"},"PeriodicalIF":0.0,"publicationDate":"2001-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87737119","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: 35
An automated method for BER characteristics measurement 一种自动测量误码率的方法
Journal of Measurement Science and Instrumentation Pub Date : 2001-05-21 DOI: 10.1109/IMTC.2001.929454
S. Berber
{"title":"An automated method for BER characteristics measurement","authors":"S. Berber","doi":"10.1109/IMTC.2001.929454","DOIUrl":"https://doi.org/10.1109/IMTC.2001.929454","url":null,"abstract":"Traditionally the bit error rate characteristics (BER) was measured for a certain number of bit-energy-to-noise ratio, Eb/No. For each point a sample of r bits is used which depends on the expected BER value. The smaller BER value the bigger the sample r. Thus, to obtain the same accuracy at each point a method of errors and trials should be used. Therefore this method extends the time of measurement and measure BER values at all points with different accuracy. This paper presents a method which allows the automated and accurate measurement of the BER characteristics at a number of points with equal accuracy at each point by using the minimum sample size r. The method is tested by measuring BER characteristics of a FFSK modem.","PeriodicalId":68878,"journal":{"name":"Journal of Measurement Science and Instrumentation","volume":"47 1","pages":"1491-1495 vol.3"},"PeriodicalIF":0.0,"publicationDate":"2001-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90636960","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
Slow-wave structures based method of measurements 基于慢波结构的测量方法
Journal of Measurement Science and Instrumentation Pub Date : 2001-05-21 DOI: 10.1109/IMTC.2001.928226
Y. Pchelnikov, D. Nyce
{"title":"Slow-wave structures based method of measurements","authors":"Y. Pchelnikov, D. Nyce","doi":"10.1109/IMTC.2001.928226","DOIUrl":"https://doi.org/10.1109/IMTC.2001.928226","url":null,"abstract":"A novel electromagnetic measurement method if described from physical point of view. Based on the application of slow-wave structures, this method combines the advantages of relatively high and relatively low frequency bands. Concentration of an electromagnetic field caused by wave deceleration leads to a significant increase in sensitivity. The main parameters and peculiarities of the sensitive elements built as sections of slow-wave structures are considered. It is shown that, in sensors based on coupled slow-wave structures, electric and magnetic fields split in the transverse direction lead to additional increase in sensitivity. The examples of practical applications of slow-wave structures based method of measurements are also presented.","PeriodicalId":68878,"journal":{"name":"Journal of Measurement Science and Instrumentation","volume":"18 1","pages":"979-983 vol.2"},"PeriodicalIF":0.0,"publicationDate":"2001-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85661132","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
Thermal dynamic model of precision wire-wound resistors 精密线绕电阻的热动力学模型
Journal of Measurement Science and Instrumentation Pub Date : 2001-05-21 DOI: 10.1109/IMTC.2001.929523
Z. Szepessy, I. Zoltán
{"title":"Thermal dynamic model of precision wire-wound resistors","authors":"Z. Szepessy, I. Zoltán","doi":"10.1109/IMTC.2001.929523","DOIUrl":"https://doi.org/10.1109/IMTC.2001.929523","url":null,"abstract":"Wire-wound type resistors are often used as reference elements in high precision electronic instruments of industrial frequencies (50-60 Hz). One of the main factors in the measurement uncertainty of these instruments is the \"self-heating\" affected drift of the built-in wire-wound resistors. The materials, geometry, construction and the thermal environment of the resistors determine the dynamics of the load-affected drift. This paper investigates a thermal model that can be used for online estimation of the load affected thermal dynamic drift of commercially available encapsulated precision wire-wound resistors. Using the suggested model, the achievable estimation error of the relative change in resistance is below 10%. The model and the model-based online error estimation allowed us to reduce the measurement uncertainty of industrial high precision calibrators and to extend the power range of standard resistors in laboratories.","PeriodicalId":68878,"journal":{"name":"Journal of Measurement Science and Instrumentation","volume":"06 1","pages":"1866-1871 vol.3"},"PeriodicalIF":0.0,"publicationDate":"2001-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86019401","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
Tin oxide gas sensing: comparison among different measurement techniques for gas mixture classification 氧化锡气敏:混合气体分类不同测量技术的比较
Journal of Measurement Science and Instrumentation Pub Date : 2001-05-21 DOI: 10.1109/IMTC.2001.928211
A. Fort, N. Machetti, S. Rocchi, M. B. Serrano-Santos, L. Tondi, N. Ulivieri, V. Vignoli, G. Sberveglieri
{"title":"Tin oxide gas sensing: comparison among different measurement techniques for gas mixture classification","authors":"A. Fort, N. Machetti, S. Rocchi, M. B. Serrano-Santos, L. Tondi, N. Ulivieri, V. Vignoli, G. Sberveglieri","doi":"10.1109/IMTC.2001.928211","DOIUrl":"https://doi.org/10.1109/IMTC.2001.928211","url":null,"abstract":"In this paper a study is presented aiming at the selection of the most appropriate measurement technique for wine classification. In particular the problem of detecting typical wine aroma components in mixtures where ethanol is present is taken into account. Literature proposes different solutions in order to enhance metal-oxide sensor selectivity. An interesting approach concerns the application of different measurement techniques. In this work three methods based on chemical transient, AC measurements and temperature modulation have been investigated.","PeriodicalId":68878,"journal":{"name":"Journal of Measurement Science and Instrumentation","volume":"77 1","pages":"910-914 vol.2"},"PeriodicalIF":0.0,"publicationDate":"2001-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91195508","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: 50
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