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IEEE Transactions on Circuits and Systems II: Analog and Digital Signal Processing

Issue 2 • Date Feb 1994

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Displaying Results 1 - 13 of 13
  • Synthesis of pipelineable complex wave digital filters

    Publication Year: 1994, Page(s):105 - 116
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (880 KB)

    A decomposition algorithm is presented for the synthesis of pipelineable, modular, cascade, complex wave (unitary) digital filters (CWDFs) with emphasis on simplicity of implementation. The main features of the algorithm are the following: (1) the extraction step obviates coefficient-form polynomial manipulations and zero-finding operations by using an alternative representation of the canonic pol... View full abstract»

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  • Practical considerations in the implementation of a frequency-domain adaptive noise canceller

    Publication Year: 1994, Page(s):164 - 168
    Cited by:  Papers (1)  |  Patents (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (460 KB)

    This paper is concerned with problems evolving around the implementation of a frequency-domain adaptive noise canceller on a fixed-point signal processor. In particular, we propose methods to improve the convergence speed and reduce the computational complexity of a constrained frequency-domain algorithm that uses a time-varying step size. In addition, we study the effects of finite word length an... View full abstract»

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  • State space representations of 2-D FIR lossless transfer matrices

    Publication Year: 1994, Page(s):117 - 132
    Cited by:  Papers (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1232 KB)

    This paper examines the properties of state-space realizations of square 2-D FIR lossless transfer matrices. Such matrices have found applications for the design of 2-D orthogonal perfect reconstruction filter banks. It is shown that 2-D FIR lossless matrices admit a minimal first-level realization with respect to one transform variable, where the dynamics are FIR and lossless in the other variabl... View full abstract»

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  • Generalized Fermat-Mersenne number theoretic transform

    Publication Year: 1994, Page(s):133 - 139
    Cited by:  Papers (7)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (520 KB)

    A generalization of the Fermat and Mersenne number transform is suggested. The transforms are defined over finite fields and rings. This paper establishes the conditions necessary for these numbers to be prime. The length of the transforms is a highly composite number. An algorithm for finding primitive roots of unity is also discussed. The proposed transforms are characterized by respectable comb... View full abstract»

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  • Quantization noise spectrum of double-loop sigma-delta converter with sinusoidal input

    Publication Year: 1994, Page(s):168 - 173
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (520 KB)

    An exact formula for the output noise spectrum of a double-loop sigma-delta modulator, under the no overloading assumption and with a sinusoidal input, is derived without the use of a white-noise model. In the case of a sinusoidal input with irrational input amplitude and digital frequency, the result agrees with the exact formula derived by ergodic theory for two-stage modulators. In addition, th... View full abstract»

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  • Complex adaptive IIR notch filter algorithm and its applications

    Publication Year: 1994, Page(s):158 - 163
    Cited by:  Papers (22)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (412 KB)

    In this paper, conventional real coefficient adaptive notch filters (ANF's) are extended to complex coefficient ones. This complex adaptive notch filter is implemented as a constrained IIR filter using a complex Gauss-Newton type algorithm to adjust its coefficients. When the ANF algorithm is applied to estimate the frequencies of sinusoids embedded in white noise. The results show that this algor... View full abstract»

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  • Optimal estimation of the parameters of all-pole transfer functions

    Publication Year: 1994, Page(s):140 - 150
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (836 KB)

    An algorithm is proposed for optimal estimation of the parameters of auto-regressive (AR) or all-pole transfer function models from prescribed impulse response data. The transfer function coefficients are estimated by minimizing the l2-norm of the exact model fitting error. Existing methods either minimize equation errors or modify the true nonlinear error criterion. In the proposed met... View full abstract»

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  • Full-duplex fast initializing digital subscriber loop echo cancellers

    Publication Year: 1994, Page(s):99 - 104
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (476 KB)

    In this paper, we propose a novel approach to fast initializing digital subscriber loop (DLS) echo cancellers using full-duplex transmitted training sequences. The important difference between our method and the previous half-duplex fast training schemes is that we can simultaneously estimate the impulse responses of the echo paths of both ends rather than estimate them separately. Therefore, the ... View full abstract»

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  • A classification of current-mode single-amplifier biquads based on a voltage-to-current transformation

    Publication Year: 1994, Page(s):151 - 156
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB)

    Using a simple and well-known voltage-to-current transformation, current-mode active RC filters that are amenable to IC realization can be derived from their voltage-based counterparts. Using this transformation, a classification of current-based single-amplifier biquads is introduced which is derived from a similar voltage-based classification. This classification is exhaustive in that it include... View full abstract»

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  • Predicting harmonic distortion in switched-current memory circuits

    Publication Year: 1994, Page(s):73 - 86
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1180 KB)

    The switched-current (SI) technique has recently been proposed as a cheaper alternative to the switched-capacitor (SC) technique. This stems largely from the fact that the analog signal processing functions performed by a SC circuit using linear capacitors and MOS transistors can be replaced by a SI circuit consisting solely of MOS transistors. At this time, most of the SI circuit design technique... View full abstract»

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  • On the multiphase symmetrical active-R oscillators

    Publication Year: 1994, Page(s):156 - 158
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (268 KB)

    The need for polyphase signals arises in many applications in communications, signal processing and power electronics. The literature contains a large number of such oscillators. Between these, the active-R oscillators are very attractive for monolithic realization. Unfortunately, a great discrepancy between the prediction of their linear analysis and the experimental results can be observed. Ther... View full abstract»

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  • An on-line unsupervised learning machine for adaptive feature extraction

    Publication Year: 1994, Page(s):87 - 98
    Cited by:  Papers (16)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (848 KB)

    Adaptive feature extraction is useful in many information processing systems. This paper proposes a learning machine implemented via a neural network to perform such a task using the tool principal component analysis. This machine (1) is adaptive to nonstationary input, (2) is based on an unsupervised learning concept and requires no knowledge of if, or when, the input changes statistically, and (... View full abstract»

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  • Inversion of linear periodically time-varying digital filters

    Publication Year: 1994, Page(s):173 - 175
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (204 KB)

    This paper discusses the inversion of linear periodically time-varying (LPTV) digital filters using the idea of converting the LPTV filter to the block time-invariant filter. Explicit expressions are given to determine the inversion of LPTV filters. Controllability and observability of the inversion of LPTV filters are discussed View full abstract»

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Aims & Scope

This title ceased production in 2003. The current updated title is IEEE Transactions on Circuits and Systems II: Express Briefs.

Full Aims & Scope