Pub Date : 2008-07-10DOI: 10.1109/ECCSC.2008.4611654
M. Boughariou, M. Fakhfakh, M. Ben Amor, M. Loulou, Y. Cooren, P. Siarry
This paper presents an approach of optimization to design and to size a low noise amplifier for the UMTS standard, using 0.35 mum CMOS technology. At 2.14 GHz, the LNA exhibits a voltage gain of 14.63 dB, a noise figure of 0.63 dB, and a 1 dB compression point of 0.12 dBm.
本文提出了一种采用0.35 μ m CMOS技术优化设计UMTS标准低噪声放大器的方法。在2.14 GHz时，LNA的电压增益为14.63 dB，噪声系数为0.63 dB, 1 dB压缩点为0.12 dBm。
{"title":"Optimizing a low noise amplifier for UMTS standard through a heuristic","authors":"M. Boughariou, M. Fakhfakh, M. Ben Amor, M. Loulou, Y. Cooren, P. Siarry","doi":"10.1109/ECCSC.2008.4611654","DOIUrl":"https://doi.org/10.1109/ECCSC.2008.4611654","url":null,"abstract":"This paper presents an approach of optimization to design and to size a low noise amplifier for the UMTS standard, using 0.35 mum CMOS technology. At 2.14 GHz, the LNA exhibits a voltage gain of 14.63 dB, a noise figure of 0.63 dB, and a 1 dB compression point of 0.12 dBm.","PeriodicalId":249205,"journal":{"name":"2008 4th European Conference on Circuits and Systems for Communications","volume":"26 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":"115867673","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.2008.4611649
G.N. Slavskiy, O. Dvornikov, A.D. Avrutin
In contemporary electronics low power consumption devices, especially analog CT ARC-filters, are of a great significance for employing in areas of communication, instrumentation, security systems, etc. The design of such filters, especially for operation in the MHz-band, is not a quite ordinary problem. The traditional solution is the design of complex CMOS schematics (filter itself, frequency tuning system, etc). Meanwhile the ARC-filter, based upon a ladder RC-circuit and having the minimal number of active elements, is rather convenient. This design provides the lower power consumption as well as simple network and technology. The principles of the design procedure of such type filters are considered. The procedure is illustrated with the designing of the LPF for 5 MHz-band; the supply voltage is 2.5 V, the power consumption is 1.35 mW. In this work we show the possibility to solve the design problem in a simple schematic basis.
{"title":"Low power consumption 5 MHz-low-pass CT ARC-filter","authors":"G.N. Slavskiy, O. Dvornikov, A.D. Avrutin","doi":"10.1109/ECCSC.2008.4611649","DOIUrl":"https://doi.org/10.1109/ECCSC.2008.4611649","url":null,"abstract":"In contemporary electronics low power consumption devices, especially analog CT ARC-filters, are of a great significance for employing in areas of communication, instrumentation, security systems, etc. The design of such filters, especially for operation in the MHz-band, is not a quite ordinary problem. The traditional solution is the design of complex CMOS schematics (filter itself, frequency tuning system, etc). Meanwhile the ARC-filter, based upon a ladder RC-circuit and having the minimal number of active elements, is rather convenient. This design provides the lower power consumption as well as simple network and technology. The principles of the design procedure of such type filters are considered. The procedure is illustrated with the designing of the LPF for 5 MHz-band; the supply voltage is 2.5 V, the power consumption is 1.35 mW. In this work we show the possibility to solve the design problem in a simple schematic basis.","PeriodicalId":249205,"journal":{"name":"2008 4th European Conference on Circuits and Systems for Communications","volume":"76 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":"116566042","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.2008.4611704
A.S. Shahraki, A. Nabavi
In this paper the equalizer requirements for the GSM and IS-95 protocols are presented. Based on the requirements, two equalizers algorithms are chosen as an effective solution for channel effects compensation in the GSM and IS-95 radio systems. The algorithms are then implemented using hardware resources and considering the common structures, a power efficient dynamic reconfigurable architecture is presented. The proposed reconfigurable processor is capable of implementing different filter structures. The equalizer structures for the GSM and IS-95 systems are divided to several cycles and are implemented in the proposed dynamic reconfigurable architecture. It is shown that the architecture can be configured to perform successful equalization of the GSM and IS-95 systems. For this purpose a MATLAB script is used to model the transmitter and the channel. The processor is designed in the 0.18 mum technology and simulation show the average power consumption for GSM and IS-95 system equalizations is 50 mW and 140 mW, respectively.
{"title":"Implementation of GSM and IS-95 equalizers on a reconfigurable architecture for software radio systems","authors":"A.S. Shahraki, A. Nabavi","doi":"10.1109/ECCSC.2008.4611704","DOIUrl":"https://doi.org/10.1109/ECCSC.2008.4611704","url":null,"abstract":"In this paper the equalizer requirements for the GSM and IS-95 protocols are presented. Based on the requirements, two equalizers algorithms are chosen as an effective solution for channel effects compensation in the GSM and IS-95 radio systems. The algorithms are then implemented using hardware resources and considering the common structures, a power efficient dynamic reconfigurable architecture is presented. The proposed reconfigurable processor is capable of implementing different filter structures. The equalizer structures for the GSM and IS-95 systems are divided to several cycles and are implemented in the proposed dynamic reconfigurable architecture. It is shown that the architecture can be configured to perform successful equalization of the GSM and IS-95 systems. For this purpose a MATLAB script is used to model the transmitter and the channel. The processor is designed in the 0.18 mum technology and simulation show the average power consumption for GSM and IS-95 system equalizations is 50 mW and 140 mW, respectively.","PeriodicalId":249205,"journal":{"name":"2008 4th European Conference on Circuits and Systems for Communications","volume":"14 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":"122176539","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.2008.4611690
N. Cotanis
Different driving forces are pushing the research community to investigate methods and techniques for estimating the RF spectrum utilization [1,2,5]. Such methods are needed either for spectrum sharing, assessing harmful interference within licensed frequency bands or for assessing the radio environment before commissioning new access nodes. The paper addresses spectrum clearance estimation and defines the associated metrics. A study case pertaining to a spectrum clearance campaign in the 2.5 GHz is included also revealing radio propagation phenomena usually overlooked by prediction models.
{"title":"New metrics for RF spectrum occupancy","authors":"N. Cotanis","doi":"10.1109/ECCSC.2008.4611690","DOIUrl":"https://doi.org/10.1109/ECCSC.2008.4611690","url":null,"abstract":"Different driving forces are pushing the research community to investigate methods and techniques for estimating the RF spectrum utilization [1,2,5]. Such methods are needed either for spectrum sharing, assessing harmful interference within licensed frequency bands or for assessing the radio environment before commissioning new access nodes. The paper addresses spectrum clearance estimation and defines the associated metrics. A study case pertaining to a spectrum clearance campaign in the 2.5 GHz is included also revealing radio propagation phenomena usually overlooked by prediction models.","PeriodicalId":249205,"journal":{"name":"2008 4th European Conference on Circuits and Systems for Communications","volume":" 16","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113950767","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.2008.4611674
A. Gheorghe, C. V. Marin, F. Constantinescu, M. Nitescu
A new RC model of the human body impedance is proposed. It is proved that this model fits better the measurements results than the known Cole model.
提出了一种新的人体阻抗RC模型。结果表明，该模型比已知的Cole模型更符合实测结果。
{"title":"A new circuit model for body cell mass prediction","authors":"A. Gheorghe, C. V. Marin, F. Constantinescu, M. Nitescu","doi":"10.1109/ECCSC.2008.4611674","DOIUrl":"https://doi.org/10.1109/ECCSC.2008.4611674","url":null,"abstract":"A new RC model of the human body impedance is proposed. It is proved that this model fits better the measurements results than the known Cole model.","PeriodicalId":249205,"journal":{"name":"2008 4th European Conference on Circuits and Systems for Communications","volume":"46 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":"131536245","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.2008.4611659
A. Campeanu, J. Gal
A new design approach for current-mode filters is presented. The realized circuits are composed only from CMOS transconductance elements and grounded capacitors. Direct block diagrams are employed to generate two universal biquad filter structures that are very suitable in building higher-order filters. The proposed circuits can simultaneously realize lowpass, bandpass and highpass filter behaviors or implement a general biquadratic transfer function, all at high impedance outputs. The circuits enjoy independent voltage control of parameters omegao and Q. SPICE simulations demonstrate the validity of the approach and the good high-frequency performances of circuits.
{"title":"Building universal current-mode biquad active filters using CMOS linear transconductance elements","authors":"A. Campeanu, J. Gal","doi":"10.1109/ECCSC.2008.4611659","DOIUrl":"https://doi.org/10.1109/ECCSC.2008.4611659","url":null,"abstract":"A new design approach for current-mode filters is presented. The realized circuits are composed only from CMOS transconductance elements and grounded capacitors. Direct block diagrams are employed to generate two universal biquad filter structures that are very suitable in building higher-order filters. The proposed circuits can simultaneously realize lowpass, bandpass and highpass filter behaviors or implement a general biquadratic transfer function, all at high impedance outputs. The circuits enjoy independent voltage control of parameters omegao and Q. SPICE simulations demonstrate the validity of the approach and the good high-frequency performances of circuits.","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":"123829577","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.2008.4611700
D. Radev, E. Rashkova, G. Hristov
Performance modelling and evaluation of multi-service UMTS networks has been major interest for mobile networks providers. The quality of service (QoS) of individual mobile users and the efficient system resource utilisation are two of the most important requirements for the cost-effective management of radio resources. It is essential to assess the performance of mobile system architectures in order to identify where potential bottlenecks and data packet blocking probability are possible to occur. The requirements for QoS for overflow probability lead to evaluate probabilities less than 10-9, which is unreasonable to be simulated with standard approaches. An algorithm with RESTART (repetitive simulation trials after reaching thresholds) approach and limited relative error was developed to speed-up the rare event simulation for new queueing theoretic models such as GE/GE/1/N/PS delay system with one server with finite capacity N and discriminatory processor share (PS) transfer rule.
{"title":"Computer modelling of wireless architectures","authors":"D. Radev, E. Rashkova, G. Hristov","doi":"10.1109/ECCSC.2008.4611700","DOIUrl":"https://doi.org/10.1109/ECCSC.2008.4611700","url":null,"abstract":"Performance modelling and evaluation of multi-service UMTS networks has been major interest for mobile networks providers. The quality of service (QoS) of individual mobile users and the efficient system resource utilisation are two of the most important requirements for the cost-effective management of radio resources. It is essential to assess the performance of mobile system architectures in order to identify where potential bottlenecks and data packet blocking probability are possible to occur. The requirements for QoS for overflow probability lead to evaluate probabilities less than 10-9, which is unreasonable to be simulated with standard approaches. An algorithm with RESTART (repetitive simulation trials after reaching thresholds) approach and limited relative error was developed to speed-up the rare event simulation for new queueing theoretic models such as GE/GE/1/N/PS delay system with one server with finite capacity N and discriminatory processor share (PS) transfer rule.","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":"130530638","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.2008.4611699
T. Hinamoto, O. Tanaka, A. Doi
The problem of minimizing a frequency-weighted l2-sensitivity measure subject to l2-scaling constraints is considered for multi-input/multi-output (MIMO) linear discrete-time systems. The constrained optimization problem is converted into an unconstrained optimization problem by using linear-algebraic techniques. An efficient quasi-Newton algorithm with closed-form formula for gradient evaluation is then applied to solve the unconstrained optimization problem. Finally, the optimal system structure is constructed by employing the resulting coordinate transformation matrix that minimizes the frequency-weighted l2-sensitivity measure subject to the scaling constraints. A numerical example is also presented to illustrate the utility of the proposed technique.
{"title":"Minimization of frequency-weighted l2-sensitivity subject to l2-scaling constraints for MIMO linear discrete-time systems using quasi-Newton algorithm","authors":"T. Hinamoto, O. Tanaka, A. Doi","doi":"10.1109/ECCSC.2008.4611699","DOIUrl":"https://doi.org/10.1109/ECCSC.2008.4611699","url":null,"abstract":"The problem of minimizing a frequency-weighted l2-sensitivity measure subject to l2-scaling constraints is considered for multi-input/multi-output (MIMO) linear discrete-time systems. The constrained optimization problem is converted into an unconstrained optimization problem by using linear-algebraic techniques. An efficient quasi-Newton algorithm with closed-form formula for gradient evaluation is then applied to solve the unconstrained optimization problem. Finally, the optimal system structure is constructed by employing the resulting coordinate transformation matrix that minimizes the frequency-weighted l2-sensitivity measure subject to the scaling constraints. A numerical example is also presented to illustrate the utility of the proposed technique.","PeriodicalId":249205,"journal":{"name":"2008 4th European Conference on Circuits and Systems for Communications","volume":"14 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":"130587584","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.2008.4611648
A. Korotkov, H. Hauer, S. Ponomarev, D. Morozov
Synthesis of a narrow band switched-capacitor (SC) filter is discussed. Design is based on element simulation method when inductors of the filter prototype have been realized by 4-phase controlled single OpA SC-imitator that gives a possibility to decrease power consumption of the device. A six order Chebyshev type bandpass SC-filter with a middle frequency 1980 Hz and a frequency band 200 Hz has been synthesized and practically implemented in 0.35 mum CMOS process. The input referred RMS noise is 140 muV while HD2 and HD3 are -45, -53 dB consequently when the input signal amplitude is equal to about 90 mV. The total current consumption of the filter is 420 muA with 3.3 V voltage supply. The active area of the filter is 800 mum x 500 mum.
讨论了一种窄带开关电容滤波器的合成。设计基于元件仿真方法，采用4相控制单OpA sc模仿器实现了滤波器原型的电感，为降低器件功耗提供了可能。合成了一个中频为1980 Hz，频带为200 Hz的六阶切比雪夫型带通sc滤波器，并在0.35 μ m CMOS工艺中实现。当输入信号幅值约为90 mV时，输入参考RMS噪声为140 muV，而HD2和HD3分别为-45、-53 dB。滤波器的总电流消耗为420mua，电压为3.3 V。滤波器的有效面积为800mum x 500mum。
{"title":"Realization of narrow-band SC-filters with low power consumption","authors":"A. Korotkov, H. Hauer, S. Ponomarev, D. Morozov","doi":"10.1109/ECCSC.2008.4611648","DOIUrl":"https://doi.org/10.1109/ECCSC.2008.4611648","url":null,"abstract":"Synthesis of a narrow band switched-capacitor (SC) filter is discussed. Design is based on element simulation method when inductors of the filter prototype have been realized by 4-phase controlled single OpA SC-imitator that gives a possibility to decrease power consumption of the device. A six order Chebyshev type bandpass SC-filter with a middle frequency 1980 Hz and a frequency band 200 Hz has been synthesized and practically implemented in 0.35 mum CMOS process. The input referred RMS noise is 140 muV while HD2 and HD3 are -45, -53 dB consequently when the input signal amplitude is equal to about 90 mV. The total current consumption of the filter is 420 muA with 3.3 V voltage supply. The active area of the filter is 800 mum x 500 mum.","PeriodicalId":249205,"journal":{"name":"2008 4th European Conference on Circuits and Systems for Communications","volume":"6 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":"130835969","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.2008.4611673
C. V. Marin, D. Marin
This paper deals with Cole model parameter identification in bioimpedance spectroscopy. A new method for the selection of test frequencies is proposed. The evaluation of the sensitivity functions versus frequency for the unknown parameters is employed. The sensitivity magnitude is used as a criterion for the test frequency selection.
{"title":"New parameter identification method in Bioimpedance Spectroscopy","authors":"C. V. Marin, D. Marin","doi":"10.1109/ECCSC.2008.4611673","DOIUrl":"https://doi.org/10.1109/ECCSC.2008.4611673","url":null,"abstract":"This paper deals with Cole model parameter identification in bioimpedance spectroscopy. A new method for the selection of test frequencies is proposed. The evaluation of the sensitivity functions versus frequency for the unknown parameters is employed. The sensitivity magnitude is used as a criterion for the test frequency selection.","PeriodicalId":249205,"journal":{"name":"2008 4th European Conference on Circuits and Systems for Communications","volume":"10 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":"121352814","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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