Pub Date : 2008-07-10DOI: 10.1109/ECCSC.2008.4611657
A. Al-Ajlouni
Industrial noise often has a periodic or quasiperiodic component embedded within the broadband noise. An active noise control system is presented to cancel these harmonics. A combination of generalized phase-locked loop (PLL) and a Filtered-X Least Mean Square (FXLMS) method is used. Large changes in the fundamental frequency can be tracked. Simulations results are presented to demonstrate the effectiveness of the proposed technique.
{"title":"Adaptive ANC using generalized phase-locked loop","authors":"A. Al-Ajlouni","doi":"10.1109/ECCSC.2008.4611657","DOIUrl":"https://doi.org/10.1109/ECCSC.2008.4611657","url":null,"abstract":"Industrial noise often has a periodic or quasiperiodic component embedded within the broadband noise. An active noise control system is presented to cancel these harmonics. A combination of generalized phase-locked loop (PLL) and a Filtered-X Least Mean Square (FXLMS) method is used. Large changes in the fundamental frequency can be tracked. Simulations results are presented to demonstrate the effectiveness of the proposed technique.","PeriodicalId":249205,"journal":{"name":"2008 4th European Conference on Circuits and Systems for Communications","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123583317","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}
Pub Date : 2008-07-10DOI: 10.1109/ECCSC.2008.4611667
D. Karadimas, M. Papamichail, K. Efstathiou
The paper presents a MOST-Only, digitally calibrated DAC architecture, based on the R-2R ladder topology. The proposed DAC architecture employs circuitry that enables the fine trimming of each bitpsilas current contribution at the DACpsilas output, thus concluding in a high linear DAC architecture. The architecture of the proposed DAC is discussed in details along with simulation results that confirm its high linearity performance. The proposed DAC topology maintains the conventional ladderpsilas performance in speed and power dissipation without requiring large area for its implementation.
{"title":"A MOST-Only R-2R ladder-based architecture for high linearity DACs","authors":"D. Karadimas, M. Papamichail, K. Efstathiou","doi":"10.1109/ECCSC.2008.4611667","DOIUrl":"https://doi.org/10.1109/ECCSC.2008.4611667","url":null,"abstract":"The paper presents a MOST-Only, digitally calibrated DAC architecture, based on the R-2R ladder topology. The proposed DAC architecture employs circuitry that enables the fine trimming of each bitpsilas current contribution at the DACpsilas output, thus concluding in a high linear DAC architecture. The architecture of the proposed DAC is discussed in details along with simulation results that confirm its high linearity performance. The proposed DAC topology maintains the conventional ladderpsilas performance in speed and power dissipation without requiring large area for its implementation.","PeriodicalId":249205,"journal":{"name":"2008 4th European Conference on Circuits and Systems for Communications","volume":"215 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116822807","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}
Pub Date : 2008-07-10DOI: 10.1109/ECCSC.2008.4611681
E. Schmidhammer
This work deals with the nonlinear behavior of acousto-electric components. Besides the well known surface acoustic wave (SAW) components also bulk acoustic wave (BAW) devices are meanwhile used in the RF front-end of mobile phones. Especially duplexers have to face the challenge of handling high-power Tx signals together with low-power Rx signals. In order to investigate the nonlinear behavior of such devices single resonators are studied in detail first. Increasing the resonator area by means of cascading lowers the power density on the surface and allows for lower input intercept points of second and third order, IIP2 and IIP3. This investigation gives a first proposal about how to improve current available BAW duplexers. In advance SAW and BAW duplexers of various vendors are measured and compared to each other with respect to their IIP2 and IIP3 values for the very first time. These measurements have been performed at the 3GPP Band II frequency band, which has the same frequency allocation (Tx: 1850 - 1910 MHz, Rx: 1930 - 1990 MHz) like the IS-95 system.
{"title":"Nonlinear effects in acousto-electric devices","authors":"E. Schmidhammer","doi":"10.1109/ECCSC.2008.4611681","DOIUrl":"https://doi.org/10.1109/ECCSC.2008.4611681","url":null,"abstract":"This work deals with the nonlinear behavior of acousto-electric components. Besides the well known surface acoustic wave (SAW) components also bulk acoustic wave (BAW) devices are meanwhile used in the RF front-end of mobile phones. Especially duplexers have to face the challenge of handling high-power Tx signals together with low-power Rx signals. In order to investigate the nonlinear behavior of such devices single resonators are studied in detail first. Increasing the resonator area by means of cascading lowers the power density on the surface and allows for lower input intercept points of second and third order, IIP2 and IIP3. This investigation gives a first proposal about how to improve current available BAW duplexers. In advance SAW and BAW duplexers of various vendors are measured and compared to each other with respect to their IIP2 and IIP3 values for the very first time. These measurements have been performed at the 3GPP Band II frequency band, which has the same frequency allocation (Tx: 1850 - 1910 MHz, Rx: 1930 - 1990 MHz) like the IS-95 system.","PeriodicalId":249205,"journal":{"name":"2008 4th European Conference on Circuits and Systems for Communications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114424046","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}
Pub Date : 2008-07-10DOI: 10.1109/ECCSC.2008.4611680
N. Militaru, M. Banciu, L. Nedelcu, G. Lojewski
In this paper a new type of dual-mode compact resonator for mobile communication systems, in the 900 MHz frequency band, is investigated. This compact planar resonator, developed on a 0.635 mm substrate with a 10.8 dielectric constant, has a square shape with an edge of 20.5 mm. For this dual resonator, several methods of modes coupling were considered. The radiation characteristics of this new resonator were investigated.
{"title":"Radiation characteristics of a novel compact microstrip patch resonator","authors":"N. Militaru, M. Banciu, L. Nedelcu, G. Lojewski","doi":"10.1109/ECCSC.2008.4611680","DOIUrl":"https://doi.org/10.1109/ECCSC.2008.4611680","url":null,"abstract":"In this paper a new type of dual-mode compact resonator for mobile communication systems, in the 900 MHz frequency band, is investigated. This compact planar resonator, developed on a 0.635 mm substrate with a 10.8 dielectric constant, has a square shape with an edge of 20.5 mm. For this dual resonator, several methods of modes coupling were considered. The radiation characteristics of this new resonator were investigated.","PeriodicalId":249205,"journal":{"name":"2008 4th European Conference on Circuits and Systems for Communications","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117219406","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}
Pub Date : 2008-07-10DOI: 10.1109/ECCSC.2008.4611644
A. Brambilla, G. Storti-Gajani
This PowerPoint presentation discusses the numerical simulation of electrical circuits for radiofrequency applications.
本幻灯片讨论了射频应用电路的数值模拟。
{"title":"Numerical simulation of electrical circuits for radiofrequency applications","authors":"A. Brambilla, G. Storti-Gajani","doi":"10.1109/ECCSC.2008.4611644","DOIUrl":"https://doi.org/10.1109/ECCSC.2008.4611644","url":null,"abstract":"This PowerPoint presentation discusses the numerical simulation of electrical circuits for radiofrequency applications.","PeriodicalId":249205,"journal":{"name":"2008 4th European Conference on Circuits and Systems for Communications","volume":"91 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117326049","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}
Pub Date : 2008-07-10DOI: 10.1109/ECCSC.2008.4611676
D. Falie, V. Buzuloiu
The distance calibration of the time of flight camera is a difficult task due to the errors produced by multi reflections of the light inside the camera body and outside. In any room the active light emitted by the camera is reflected by the walls and the objects in the scene. Thus the reflected light by the objects in the scene is the sum of this light and the direct light emitted by the camera. The distance information is affected by this indirect light. The calibration method we propose can be performed not only in laboratory condition but also in any conditions. The distance errors for all objects in the scene can be corrected if white or black tags (labels) are attached on objects.
{"title":"Further investigations on ToF cameras distance errors and their corrections.","authors":"D. Falie, V. Buzuloiu","doi":"10.1109/ECCSC.2008.4611676","DOIUrl":"https://doi.org/10.1109/ECCSC.2008.4611676","url":null,"abstract":"The distance calibration of the time of flight camera is a difficult task due to the errors produced by multi reflections of the light inside the camera body and outside. In any room the active light emitted by the camera is reflected by the walls and the objects in the scene. Thus the reflected light by the objects in the scene is the sum of this light and the direct light emitted by the camera. The distance information is affected by this indirect light. The calibration method we propose can be performed not only in laboratory condition but also in any conditions. The distance errors for all objects in the scene can be corrected if white or black tags (labels) are attached on objects.","PeriodicalId":249205,"journal":{"name":"2008 4th European Conference on Circuits and Systems for Communications","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131482354","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}
Pub Date : 2008-07-10DOI: 10.1109/ECCSC.2008.4611663
S. Krutchinsky, E.I. Starchnko, A. I. Gavlicky
Schematic methods of analogous voltage multiplier with different supply voltage construction are considered. A schematic circuit examples and simulation results of analogous multiplier based on different master slice array components and SiGe technology are given.
{"title":"Analogous voltage multiplier based on bipolar transistors and MOSFET","authors":"S. Krutchinsky, E.I. Starchnko, A. I. Gavlicky","doi":"10.1109/ECCSC.2008.4611663","DOIUrl":"https://doi.org/10.1109/ECCSC.2008.4611663","url":null,"abstract":"Schematic methods of analogous voltage multiplier with different supply voltage construction are considered. A schematic circuit examples and simulation results of analogous multiplier based on different master slice array components and SiGe technology are given.","PeriodicalId":249205,"journal":{"name":"2008 4th European Conference on Circuits and Systems for Communications","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131718782","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}
Pub Date : 2008-07-10DOI: 10.1109/ECCSC.2008.4611692
Liang-Bi Chen, Y. Jeang, Tsung-Yu Ho, Ing-Jer Huang
Quality of transmission is very important in digital communication. The BER (bit error rate) of a PCM encoding method may be varied according to different working condition or different signal source. Theoretically, the BER of encoding method can be estimated mathematically. The BER is generally assumed as a constant value. The BER, however, is not deterministic in real world. In this paper, a Dynamic PCM Selector that can dynamically select an optimal PCM codec module is proposed. The system can dynamically switch to the encoding mode with possible lowest BER, according to the current type of the transmission. By way of this design, it can greatly reduce the overheads of the error correction process.
{"title":"A dynamic PCM codec selector for different working environments","authors":"Liang-Bi Chen, Y. Jeang, Tsung-Yu Ho, Ing-Jer Huang","doi":"10.1109/ECCSC.2008.4611692","DOIUrl":"https://doi.org/10.1109/ECCSC.2008.4611692","url":null,"abstract":"Quality of transmission is very important in digital communication. The BER (bit error rate) of a PCM encoding method may be varied according to different working condition or different signal source. Theoretically, the BER of encoding method can be estimated mathematically. The BER is generally assumed as a constant value. The BER, however, is not deterministic in real world. In this paper, a Dynamic PCM Selector that can dynamically select an optimal PCM codec module is proposed. The system can dynamically switch to the encoding mode with possible lowest BER, according to the current type of the transmission. By way of this design, it can greatly reduce the overheads of the error correction process.","PeriodicalId":249205,"journal":{"name":"2008 4th European Conference on Circuits and Systems for Communications","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123827908","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}
Pub Date : 2008-07-10DOI: 10.1109/ECCSC.2008.4611679
N. Prokopenko, A. Budyakov, S. Kryukov
The architecture and advanced circuit engineering of differential and operational amplifiers with increased common-mode rejection ratio are suggested and discussed.
提出并讨论了提高共模抑制比的差分放大器和运算放大器的结构和先进电路工程。
{"title":"Architecture and circuit engineering of precision differential amplifiers with increased common-mode rejection","authors":"N. Prokopenko, A. Budyakov, S. Kryukov","doi":"10.1109/ECCSC.2008.4611679","DOIUrl":"https://doi.org/10.1109/ECCSC.2008.4611679","url":null,"abstract":"The architecture and advanced circuit engineering of differential and operational amplifiers with increased common-mode rejection ratio are suggested and discussed.","PeriodicalId":249205,"journal":{"name":"2008 4th European Conference on Circuits and Systems for Communications","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115542137","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}
Pub Date : 2008-07-10DOI: 10.1109/ECCSC.2008.4611678
N. Prokopenko, A. Budyakov, E. M. Savchenko, S. Korneev
We have considered the features of voltage and current feedback Op Amps for linear and nonlinear modes under unified conditions. We have obtained the conditions of Op Amp identity for following parameters: performance, bandwidth and unity gain frequency. These obtained conditions update Op Amp maximum ratings as opposed to prevailing notion.
{"title":"Maximum ratings of voltage feedback and current feedback operational amplifiers in linear and nonlinear modes","authors":"N. Prokopenko, A. Budyakov, E. M. Savchenko, S. Korneev","doi":"10.1109/ECCSC.2008.4611678","DOIUrl":"https://doi.org/10.1109/ECCSC.2008.4611678","url":null,"abstract":"We have considered the features of voltage and current feedback Op Amps for linear and nonlinear modes under unified conditions. We have obtained the conditions of Op Amp identity for following parameters: performance, bandwidth and unity gain frequency. These obtained conditions update Op Amp maximum ratings as opposed to prevailing notion.","PeriodicalId":249205,"journal":{"name":"2008 4th European Conference on Circuits and Systems for Communications","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132971933","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}
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