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Proceedings of the IEEE

Issue 9 • Date Sept. 1978

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Displaying Results 1 - 25 of 29
  • [Front cover and table of contents]

    Publication Year: 1978 , Page(s): c1
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  • Scanning the issue

    Publication Year: 1978 , Page(s): 995
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  • Relationships between digital signal processing and control and estimation theory

    Publication Year: 1978 , Page(s): 996 - 1017
    Cited by:  Papers (27)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2615 KB)  

    The purpose of this paper is to explore several current research directions in the fields of digital signal processing and modern control and estimation theory. We examine topics such as stability theory, linear prediction, and parameter identification, system synthesis and implementation, two-dimensional filtering, decentralized control and estimation, and image processing, in order to uncover some of the basic similarities and differences in the goals, techniques, and philosophy of the two disciplines. View full abstract»

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  • Stability of multidimensional scalar and matrix polynomials

    Publication Year: 1978 , Page(s): 1018 - 1047
    Cited by:  Papers (94)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (3029 KB)  

    A comprehensive study of multidimensional stability and related problems of scalar and matrix polynomials is presented in this survey paper. In particular, applications of this study to stability of multidimensional recursive digital and continuous filters, to synthesis of network with commensurate and noncommensurate transmission lines, and to numerical stability of stiff differential equations are enumerated. A novel approach to the multidimensional stability study is the classification of various regions of analyticity. Various computational tests for checking these regions are presented. These include the classical ones based on inners and symmetric matrix approach, table form, local positivity, Lyapunov test, the impulse response tests, the cepstral method and the graphical ones based on Nyquist-like tests. A thorough discussion and comparison of the computational complexities which arise in the various tests are included. A critical view of the progress made during the last two decades on multidimensional stability is presented in the conclusions. The latter also includes some research topics for future investigations. An extensive list of references constitutes a major part of this survey. View full abstract»

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  • Characterization of phase and frequency instabilities in precision frequency sources: Fifteen years of progress

    Publication Year: 1978 , Page(s): 1048 - 1075
    Cited by:  Papers (133)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2542 KB)  

    Precision frequency sources such as quartz oscillators, masers, and passive atomic frequency standards are affected by phase and frequency instabilities including both random and deterministic components. It is of prime importance to have a comprehensive characterization of these instabilities in order to be able to assess the potential utility of each source. For that purpose, many parameters have been proposed especially for dealing with random fluctuations. Some of them have been recommended by the IEEE Subcommittee on Frequency Stability and later by Study Group 7 on "Standard Frequencies and Time Signals" of the International Radio Consultative Committee (CCIR). Others are not so widely used but show interesting capabilities. This paper aims at giving a broad review of parameters proposed for phase and frequency instability characterization, including both classical widely used concepts and more recent less familiar approaches. Transfer functions that link frequency-domain and time-domain parameters are emphasized because they provide improved understanding of the properties of a given time-domain parameter or facilitate introducing of new parameters. As far as new approaches are concerned, an attempt has been made to demonstrate clearly their respective advantages. To this end, some developments that did not appear in the original references ate presented here, e.g, the modified three sample variance Σy2(τ), the expressions of 〈δy-T2〉, the intetpretation of structure functions of phase and its relations with Σy2(τ) and the Hadamard variance. The effects of polynomial phase and frequency drifts on various parameters have also been pointed out in parallel with those of random processes modeled by power-law spectral densities. View full abstract»

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  • Calculation of distributed resistive structures

    Publication Year: 1978 , Page(s): 1077 - 1079
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (290 KB)  

    A new method for calculation of distributed resistive structures is presented. This method is based on the conformal mapping of the distributed domain on the complex half-plane and the determination of the complex potential function as a solution of a Dirichlet problem. The method can be used in all cases when the distributed structure can be approximated with domains having conducting terminals separated by insulating points. The utility of the method is exemplified in the last part of the correspondence. View full abstract»

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  • Dephasing measure in the diffraction by a hologram grating

    Publication Year: 1978 , Page(s): 1079 - 1080
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    For the plane wave diffraction by a dielectric hologram grating, the angular and the wavelength sensitivity measures are systematically deduced and compared with the previous results. View full abstract»

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  • Boundary conditions for a thick hologram grating

    Publication Year: 1978 , Page(s): 1080 - 1082
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    The phenomenological boundary conditions for the slowly varying amplitudes of the electromagnetic fields diffracted by a thick hologram grating are deduced from the solution of the full electro-magnetic boundary value problem. View full abstract»

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  • On digital filter structures with low coefficient sensitivities

    Publication Year: 1978 , Page(s): 1082 - 1083
    Cited by:  Papers (18)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (193 KB)  

    A simple network transformation method is proposed to generate equivalent digital filter structures whose multiplier coefficients are functions of the parameters of the transformation. An application of this proposed approach, illustrated here, is in generating structures with low coefficient sensitivities. View full abstract»

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  • Inverse complementary network theorem

    Publication Year: 1978 , Page(s): 1083 - 1084
    Cited by:  Papers (1)
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    An inverse complementary network theorem is stated and proved. Its application in active RC synthesis of any transfer impedance is given. View full abstract»

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  • A simple formula for energy calculations

    Publication Year: 1978 , Page(s): 1084 - 1085
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    This paper presents a simple formula for evaluating an often encountered integral when calculating energy related quantities in linear systems. Examples are included. View full abstract»

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  • Maximum power obtainable in a nonlinear system

    Publication Year: 1978 , Page(s): 1085 - 1086
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (185 KB)  

    This paper presents a new condition to derive a maximum output power from a generator with a nonlinear output conductance to a nonlinear load. This condition is satisfied with a formula that an output differential conductance is equal to the load conductance. This formula would be quite useful for a design of high-power amplifiers and oscillators. View full abstract»

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  • Two-dimensional FIR digital filters with maximally flat magnitude

    Publication Year: 1978 , Page(s): 1086 - 1088
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (283 KB)  

    Generation of a class of maximally flat magnitude two-dimensional FIR functions employing McClellan transformation is described and their properties are discussed. View full abstract»

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  • On a new soliton line constructed from an equivalent circuit of undamped spiking of lasers

    Publication Year: 1978 , Page(s): 1088 - 1089
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (171 KB)  

    A new nonlinear transmission line is constructed from the ladder connections of the equivalent tank circuit of undamped spiking of lasers which is a nonconservative oscillatory system. The computer experiments reveal that solitary waves propagate on the line showing soliton-like nature. View full abstract»

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  • A grounded inductance simulation using the DVCCS/DVCVS

    Publication Year: 1978 , Page(s): 1089 - 1091
    Cited by:  Papers (1)  |  Patents (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (262 KB)  

    A new economical active RC realization of a grounded inductance using the DVCCS/DVCVS as the active element is given. The circuit uses a single grounded capacitor which controls the magnitude of the inductor. Sensitivities to all passive and active circuit components are very low. Application of the simulated inductance in the realization of a canonic selective parallel resonator is discussed. View full abstract»

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  • A perfect positive integrator using extremely low capacitance

    Publication Year: 1978 , Page(s): 1091
    Cited by:  Papers (2)
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    A perfect positive integrator using a single grounded capacitor of extremely low value is described. A single resistance controlled (SRC) gain constant is another advantage of the circuit. View full abstract»

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  • Programmable CTD filters using pulse duration modulation

    Publication Year: 1978 , Page(s): 1091 - 1093
    Cited by:  Papers (1)
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    A CTD filter is synthesized using a simple programmable coefficient policy. This policy is suitable for on-line operation and possesses a simple hardware realization. Experimental results are presented to demonstrate the potential of the proposed method. View full abstract»

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  • Mean power of the components of a Rice fading signal determined from measurements

    Publication Year: 1978 , Page(s): 1094 - 1095
    Cited by:  Papers (1)
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    A method is provided for estimating the mean power of each of the two components of a Rice fading signal, given measurements of the mean and standard deviation of the total signal power. View full abstract»

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  • Improvement of signal-to-noise ratio in an ideal bandpass limiter with a hysteresis

    Publication Year: 1978 , Page(s): 1095 - 1096
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    A sinusoidal signal and Gaussian noise lying in a narrow bandpass through an ideal limiter with a hysteresis, followed by a filter that confines the output to the vicinity of the input frequencies. It is indicated by experiments that a significant improvement in the output SNR at low input SNR can be achieved by this nonlinear device. View full abstract»

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  • A method for increasing the number of majority multiplexed channels

    Publication Year: 1978 , Page(s): 1096 - 1097
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (228 KB)  

    A majority multiplexing method for multiplexing some moderately large number of binary data channels is proposed. It is shown that the number of channels can be increased if the transmitted signal is formed by using a two-stage transformation process. A suitable detection process for recovering the binary data elements is established. Results of computer studies on the performance of the method in additive white Gaussian noise are presented, and the method is briefly compared with TDM. View full abstract»

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  • Improved mercury arc lamps

    Publication Year: 1978 , Page(s): 1098 - 1099
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    The devitrification problem of capillary high pressure mercury lamps is shown to be caused by impurities in the natural quartz. It is shown that this problem may be solved by using synthetic quartz of low OH-content. An improvement of lamp life by an order of magnitude appears to be possible. View full abstract»

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  • Spectrum management techniques

    Publication Year: 1978 , Page(s): 1100
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  • Microwave system engineering principles

    Publication Year: 1978 , Page(s): 1100 - 1101
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    Freely Available from IEEE
  • Signal analysis

    Publication Year: 1978 , Page(s): 1101 - 1102
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    Freely Available from IEEE
  • Introduction to filter theory

    Publication Year: 1978 , Page(s): 1101
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H. Joel Trussell
North Carolina State University