Pub Date : 1995-08-13DOI: 10.1109/MWSCAS.1995.510292
C. Cunha, S. Gomes
In this paper we discuss an adaptive method for the computation of discontinuous solutions of hyperbolic conservation laws. In each time level we use techniques coming from interpolatory multiresolution analyses for detecting discontinuities of the solution. The adaptive scheme uses first order upwind flux computation in the immediate neighbourhood of these irregularities. Since the differential equation holds in the smoothness domain, we follow the characteristics in the time marching procedure at grid points in that domain.
{"title":"Shock capturing using interpolatory wavelets","authors":"C. Cunha, S. Gomes","doi":"10.1109/MWSCAS.1995.510292","DOIUrl":"https://doi.org/10.1109/MWSCAS.1995.510292","url":null,"abstract":"In this paper we discuss an adaptive method for the computation of discontinuous solutions of hyperbolic conservation laws. In each time level we use techniques coming from interpolatory multiresolution analyses for detecting discontinuities of the solution. The adaptive scheme uses first order upwind flux computation in the immediate neighbourhood of these irregularities. Since the differential equation holds in the smoothness domain, we follow the characteristics in the time marching procedure at grid points in that domain.","PeriodicalId":165081,"journal":{"name":"38th Midwest Symposium on Circuits and Systems. Proceedings","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122332902","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 : 1995-08-13DOI: 10.1109/MWSCAS.1995.510267
T. Ruotsalainen, P. Palojarvi, J. Kostamovaara
Integrated CMOS and BiCMOS timing detectors have been designed for the receiver of a portable laser radar. The timing detectors produce accurately timed logic level pulses from noisy analog pulses, whose amplitude varies in a wide range. The distance measurement result of the designed BiCMOS (CMOS) detector varies +/-4 mm (+/-9 mm) with an input amplitude range of 55 mV-3.3 V (0.5 V-2.2 V). The single shot resolution with SNR=250 is better than 6 mm (10.5 mm).
设计了一种用于便携式激光雷达接收机的集成CMOS和BiCMOS定时探测器。定时检测器从有噪声的模拟脉冲中产生精确定时的逻辑电平脉冲，其幅值变化范围很广。设计的BiCMOS (CMOS)探测器在55 mV-3.3 V (0.5 V-2.2 V)的输入幅度范围内，距离测量结果为+/-4 mm (+/-9 mm)，单次发射分辨率(信噪比=250)优于6 mm (10.5 mm)。
{"title":"BiCMOS and CMOS timing detectors for the receiver of a portable laser rangefinding device","authors":"T. Ruotsalainen, P. Palojarvi, J. Kostamovaara","doi":"10.1109/MWSCAS.1995.510267","DOIUrl":"https://doi.org/10.1109/MWSCAS.1995.510267","url":null,"abstract":"Integrated CMOS and BiCMOS timing detectors have been designed for the receiver of a portable laser radar. The timing detectors produce accurately timed logic level pulses from noisy analog pulses, whose amplitude varies in a wide range. The distance measurement result of the designed BiCMOS (CMOS) detector varies +/-4 mm (+/-9 mm) with an input amplitude range of 55 mV-3.3 V (0.5 V-2.2 V). The single shot resolution with SNR=250 is better than 6 mm (10.5 mm).","PeriodicalId":165081,"journal":{"name":"38th Midwest Symposium on Circuits and Systems. Proceedings","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122369549","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 : 1995-08-13DOI: 10.1109/MWSCAS.1995.510310
J. Machado da Silva, Silva Matos, I. Bell, G. Taylor
Power supply current monitoring is a promising technique for the development of new test methodologies for analogue and mixed-signal circuits, following the success attained in the digital domain. This paper shows that improved test efficiency and confidence is obtained when both functional output voltage and power supply current signals are observed. Results obtained from simulation of a number of circuits are presented comparing Fault Coverage, Normalised Deviation, and the Coefficient of Variation of faulty responses deviation amplitudes. Also, different test stimuli are compared to evaluate their suitability for testing.
{"title":"Use of power supply current and output voltage observation for testing large mixed-signal devices","authors":"J. Machado da Silva, Silva Matos, I. Bell, G. Taylor","doi":"10.1109/MWSCAS.1995.510310","DOIUrl":"https://doi.org/10.1109/MWSCAS.1995.510310","url":null,"abstract":"Power supply current monitoring is a promising technique for the development of new test methodologies for analogue and mixed-signal circuits, following the success attained in the digital domain. This paper shows that improved test efficiency and confidence is obtained when both functional output voltage and power supply current signals are observed. Results obtained from simulation of a number of circuits are presented comparing Fault Coverage, Normalised Deviation, and the Coefficient of Variation of faulty responses deviation amplitudes. Also, different test stimuli are compared to evaluate their suitability for testing.","PeriodicalId":165081,"journal":{"name":"38th Midwest Symposium on Circuits and Systems. Proceedings","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114541107","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 : 1995-08-13DOI: 10.1109/MWSCAS.1995.510252
A. Bigongiari, S. Brigati, G. Caiulo, G. Franchi, F. Maloberti
A vast amount of signal processing will soon be required in close proximity to high-energy physics detectors. The challenge is to transfer conventional electronics to VLSI technologies. This paper discusses the present trends in nuclear electronics and presents integrated realisations of two processing systems commonly used in high-energy physics experiments: a discriminator and a charge-to-time converter. The chips, fabricated in 1.2 /spl mu/m BiCMOS technology, feature high speed of operation and high-quality processing performance combined with reduced silicon area and power consumption.
{"title":"High speed and high performance signal processing for nuclear electronics","authors":"A. Bigongiari, S. Brigati, G. Caiulo, G. Franchi, F. Maloberti","doi":"10.1109/MWSCAS.1995.510252","DOIUrl":"https://doi.org/10.1109/MWSCAS.1995.510252","url":null,"abstract":"A vast amount of signal processing will soon be required in close proximity to high-energy physics detectors. The challenge is to transfer conventional electronics to VLSI technologies. This paper discusses the present trends in nuclear electronics and presents integrated realisations of two processing systems commonly used in high-energy physics experiments: a discriminator and a charge-to-time converter. The chips, fabricated in 1.2 /spl mu/m BiCMOS technology, feature high speed of operation and high-quality processing performance combined with reduced silicon area and power consumption.","PeriodicalId":165081,"journal":{"name":"38th Midwest Symposium on Circuits and Systems. Proceedings","volume":"126 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114573492","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 : 1995-08-13DOI: 10.1109/MWSCAS.1995.510261
M.E. Wilhoyte, T. Ogunfunmi
Summary form only given, as follows. This paper investigates the convergence properties of the constrained frequency-domain block LMS (CFBLMS) algorithm and the unconstrained frequency-domain block LMS (UFBLMS) algorithm when applied to truncated Volterra systems. As shown by previous work, the range of stability for the UFBLMS algorithm for linear systems is 1/2 of that with the CFBLMS algorithm. This work verifies that this relationship between the UFBLMS algorithm and the CFBLMS algorithm is valid for truncated Volterra systems as well. This paper further shows through simulation results that the performance of the UFBLMS algorithm is comparable to the CFBLMS algorithm if the step size is adaptive.
{"title":"Convergence properties of the frequency domain block-LMS Volterra adaptive filter","authors":"M.E. Wilhoyte, T. Ogunfunmi","doi":"10.1109/MWSCAS.1995.510261","DOIUrl":"https://doi.org/10.1109/MWSCAS.1995.510261","url":null,"abstract":"Summary form only given, as follows. This paper investigates the convergence properties of the constrained frequency-domain block LMS (CFBLMS) algorithm and the unconstrained frequency-domain block LMS (UFBLMS) algorithm when applied to truncated Volterra systems. As shown by previous work, the range of stability for the UFBLMS algorithm for linear systems is 1/2 of that with the CFBLMS algorithm. This work verifies that this relationship between the UFBLMS algorithm and the CFBLMS algorithm is valid for truncated Volterra systems as well. This paper further shows through simulation results that the performance of the UFBLMS algorithm is comparable to the CFBLMS algorithm if the step size is adaptive.","PeriodicalId":165081,"journal":{"name":"38th Midwest Symposium on Circuits and Systems. Proceedings","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128408063","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 : 1995-08-13DOI: 10.1109/MWSCAS.1995.504507
A. Krukowski, G. Cain, I. Kale
This paper addresses high-order frequency transformation and extends standard Constantinides, Mullis/Franchitti transformations and the exact N-point approach we have previously reported. Using specially designed M/sup th/ order allpass filters, mapping of N features of the prototype filter can be carried out independently (where N
{"title":"Custom designed high-order frequency transformations for IIR filters","authors":"A. Krukowski, G. Cain, I. Kale","doi":"10.1109/MWSCAS.1995.504507","DOIUrl":"https://doi.org/10.1109/MWSCAS.1995.504507","url":null,"abstract":"This paper addresses high-order frequency transformation and extends standard Constantinides, Mullis/Franchitti transformations and the exact N-point approach we have previously reported. Using specially designed M/sup th/ order allpass filters, mapping of N features of the prototype filter can be carried out independently (where N<M). The mapping filter is designed taking special care to ensure that there are no excess mapping replicas which may arise if an exact N-point transformation is used. This design viewpoint represents a significant departure from previous approaches to filter transformations.","PeriodicalId":165081,"journal":{"name":"38th Midwest Symposium on Circuits and Systems. Proceedings","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128430673","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 : 1995-08-13DOI: 10.1109/MWSCAS.1995.504437
C. Calligaro, V. Daniele, R. Gastaldi, A. Manstretta, G. Torelli
A serial sensing method for multistorage non-volatile memories, based on a dichotomic algorithm, is presented. While incorporating the main advantage of the serial approach (the use of a single sense amplifier), this method reduces sensing time to a minimum and ensures its independence from memory cell contents. Moreover, high throughput is ensured in serial-output memories.
{"title":"Dichotomic current-mode serial sensing methodology for multistorage non-volatile memories","authors":"C. Calligaro, V. Daniele, R. Gastaldi, A. Manstretta, G. Torelli","doi":"10.1109/MWSCAS.1995.504437","DOIUrl":"https://doi.org/10.1109/MWSCAS.1995.504437","url":null,"abstract":"A serial sensing method for multistorage non-volatile memories, based on a dichotomic algorithm, is presented. While incorporating the main advantage of the serial approach (the use of a single sense amplifier), this method reduces sensing time to a minimum and ensures its independence from memory cell contents. Moreover, high throughput is ensured in serial-output memories.","PeriodicalId":165081,"journal":{"name":"38th Midwest Symposium on Circuits and Systems. Proceedings","volume":"1935 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129018189","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 : 1995-08-13DOI: 10.1109/MWSCAS.1995.510226
G.F. Ribeiro, G. Mendonça
A method for image coding employing the Wavelet Transform is proposed. A coder on the Wavelet domain that attempts to minimize visible distortion is developed. The performance of the proposed method is evaluated by means of simulations on several images.
{"title":"Image coding using biorthogonal Wavelet Transform","authors":"G.F. Ribeiro, G. Mendonça","doi":"10.1109/MWSCAS.1995.510226","DOIUrl":"https://doi.org/10.1109/MWSCAS.1995.510226","url":null,"abstract":"A method for image coding employing the Wavelet Transform is proposed. A coder on the Wavelet domain that attempts to minimize visible distortion is developed. The performance of the proposed method is evaluated by means of simulations on several images.","PeriodicalId":165081,"journal":{"name":"38th Midwest Symposium on Circuits and Systems. Proceedings","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129350315","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 : 1995-08-13DOI: 10.1109/MWSCAS.1995.510336
F. Freitas, A. Simões Costa
This paper presents a computationally efficient method for calculating the optimal feedback gain applicable to large scale systems. The plant is represented by using descriptor systems and the gain is calculated directly through the numerical integration of the Chandrasekhar equations. This allows the application of modern sparsity techniques, thus reducing the computational burden. Tests in two dynamic systems are conducted in order to assess the performance of the proposed method as compared with other techniques based on the conventional solution of the algebraic Riccati equation.
{"title":"Sparse solution of the linear quadratic regulator problem for large scale systems applications","authors":"F. Freitas, A. Simões Costa","doi":"10.1109/MWSCAS.1995.510336","DOIUrl":"https://doi.org/10.1109/MWSCAS.1995.510336","url":null,"abstract":"This paper presents a computationally efficient method for calculating the optimal feedback gain applicable to large scale systems. The plant is represented by using descriptor systems and the gain is calculated directly through the numerical integration of the Chandrasekhar equations. This allows the application of modern sparsity techniques, thus reducing the computational burden. Tests in two dynamic systems are conducted in order to assess the performance of the proposed method as compared with other techniques based on the conventional solution of the algebraic Riccati equation.","PeriodicalId":165081,"journal":{"name":"38th Midwest Symposium on Circuits and Systems. Proceedings","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126669794","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 : 1995-08-13DOI: 10.1109/MWSCAS.1995.504364
H.M. de Lima, O. Duarte
This paper presents and evaluates two point-to-multipoint GB(N) protocols. They accomplish continuously repeated retransmission to overcome noisy channel error condition and provide buffer at receivers, aiming at improving their throughput efficiencies. The first scheme is a point-to-multipoint version of the single destination Morris's GB(N). The other one results from slight modifications in the retransmission procedure. After the continuously repeated retransmission, the transmitter sends m (m/spl ges/1) copies of messages sent in advance and received in error. Numerical results show that the proposed modification significantly improves the throughput efficiency. Moreover, the proposed protocols outperforms many other multidestination GB(N) schemes.
{"title":"Performance of repeated retransmission GB(N) schemes for point-to-multipoint noisy channels [satellite communication]","authors":"H.M. de Lima, O. Duarte","doi":"10.1109/MWSCAS.1995.504364","DOIUrl":"https://doi.org/10.1109/MWSCAS.1995.504364","url":null,"abstract":"This paper presents and evaluates two point-to-multipoint GB(N) protocols. They accomplish continuously repeated retransmission to overcome noisy channel error condition and provide buffer at receivers, aiming at improving their throughput efficiencies. The first scheme is a point-to-multipoint version of the single destination Morris's GB(N). The other one results from slight modifications in the retransmission procedure. After the continuously repeated retransmission, the transmitter sends m (m/spl ges/1) copies of messages sent in advance and received in error. Numerical results show that the proposed modification significantly improves the throughput efficiency. Moreover, the proposed protocols outperforms many other multidestination GB(N) schemes.","PeriodicalId":165081,"journal":{"name":"38th Midwest Symposium on Circuits and Systems. Proceedings","volume":"21 46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129094937","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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