摘要:

AbstractHigh‐performance bandpass sigma‐delta modulators find applications in digital mobile radio for accurate analogue‐to‐digital conversion in receivers.An approach based on the positioning of the poles and zeros is proposed for the digital design of the high‐order loop filters which are required. Inverse notch filter sections are cascaded in a first step and then poles and zeros are moved to meet the performance objectives and achieve system stability.A distinct feature of the analysis and design technique presented is that it takes stability into account explicitly.Examples illustrate the practicality of the method as well as the level of performance which can be achieved in theory. the integrated circuit realization still has to be investigated to confirm the potential of the proposed design

ISSN:0098-9886    

DOI:10.1002/cta.4490230502

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1995

数据来源: WILEY

摘要:

AbstractSome theoretical properties concerning discrete‐time (discrete‐state) cellular neural networks (DTCNNs) are presented which illustrate the role of self‐feedback and shed some light on the sizes and shapes of the attraction basins. the main results proved in the paper are the following. (1) With no self‐feedback, two states cannot both be fixed points of the DTCNN dynamics if they differ or coincide in isolated grid positions. (2) With no self‐feedback, every state which differs from a fixed point v (coincides with v) only in isolated grid positions is attracted to v(‐v) along some orbit with block‐sequential dynamics. (3) For ak‐attractor of a DTCNN we havek<(2r+ 1)2/2, whereris the neighbourhood radius. (4) the attraction domain of ak‐attractor v includes all the states which differ from v inat mostkpositions per neighbourhood. the properties proved herein are a consequence exclusively of the local conne

ISSN:0098-9886    

DOI:10.1002/cta.4490230503

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1995

数据来源: WILEY

摘要:

AbstractA novel method is described for the frequency estimation of signals from a noisy background. It is based on realizing the IIR adaptive filter as a parallel connection of discrete orthogonal sections. A fast Gauss‐Newton‐type recursive algorithm has also been derived to update the parameters of these orthogonal sections. It has been shown that for highly noisy signals, this approach significantly improves the frequency estimation capabilities as well as increases the overall signal‐to‐noise ratio of the adaptive recursive filters. Illustrative examples are given to verify these

ISSN:0098-9886    

DOI:10.1002/cta.4490230504

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1995

数据来源: WILEY

摘要:

AbstractIn this paper a new sensitivity measure for state space systems is proposed. This new measure is a modified form of Tavsanoglu and Thiele's measure but has three advantages: (1) it is more precise than Tavsanoglu and Thiele's measure when the parameters of the state space realizations contain 0 and ±1; (2) it can be used to explain why the sparse Schur and Hessenberg realizations can give better actual sensitivity performance than the corresponding fully parametrized optimal realizations; (3) it is identical with the global round‐off noise gainG= tr(QW) +yobtained by Hwang under a dynamic constrai

ISSN:0098-9886    

DOI:10.1002/cta.4490230505

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1995

数据来源: WILEY

ISSN:0098-9886    

DOI:10.1002/cta.4490230506

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1995

数据来源: WILEY

ISSN:0098-9886    

DOI:10.1002/cta.4490230507

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1995

数据来源: WILEY

ISSN:0098-9886    

DOI:10.1002/cta.4490230508

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1995

数据来源: WILEY

ISSN:0098-9886    

DOI:10.1002/cta.4490230501

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1995

数据来源: WILEY