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Communications, Radar and Signal Processing, IEE Proceedings F

Issue 3 • Date June 1981

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Displaying Results 1 - 11 of 11
  • Suboptimal reception of binary CPSK signals

    Publication Year: 1981, Page(s):125 - 134
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1040 KB)

    A general class of binary continuous-phase shift keying (CPSK) signals is defined, of which continuous-phase FSK (CPFSK) and continuous-phase chirp (CPC) signals are special cases. The structure and performance of suboptimal average matched filter (AMF) receivers with multibit observation are considered; both coherent and noncoherent detection of binary CPSK signals are investigated. Expressions s... View full abstract»

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  • New method for generating frequency modulation

    Publication Year: 1981, Page(s):135 - 139
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (694 KB)

    The paper describes how asynchronons delta sigma modulation can be used to generate frequency modulation. Present FM modulators have an inherent nonlinearity in the voltage/frequency characteristic, and as a consequence they are restricted to small percentage frequency deviations. The ADSM-FM modulator is inherently linear, allowing a wide percentage frequency deviation to be obtained. When incorp... View full abstract»

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  • Jamming rejection capability of broadband frost power inversion array

    Publication Year: 1981, Page(s):140 - 151
    Cited by:  Papers (10)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1551 KB)

    The jamming rejection capability of the broadband Frost power inversion array is investigated both theoretically in a qualitative manner assuming small bandwidth and experimentally using simulation as a function of the various parameters. The results obtained are used for designing the transversal filters behind the array elements as well as assessing, in terms of the number of variable weights, t... View full abstract»

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  • Direct minimal-order Markov model for sliding-window detection probabilities

    Publication Year: 1981, Page(s):152 - 154
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (350 KB)

    An algorithmic derivation is described for a minimal-order Markov model for the problem of obtaining sliding-window detection probabilities. The advantage of this model over previous ones is the ease with which it may be run on a computer. A computer program for determining detection probabilities is described. View full abstract»

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  • Adaptive decision-feedback predictive coding of digital sources

    Publication Year: 1981, Page(s):155 - 160
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (751 KB)

    A 1-bit adaptive decision-feedback predictive coding (ADFPC) system is derived on the assumption of `good┬┐┬┐ decisions. The predictor in the ADFPC is made adaptive by projecting the gradient, at each iteration, along the co-ordinate which exhibits the maximum absolute gradient. This gradient-seeking method requires that the stepsize only needs to be optimum with respect to a single coefficient (co-... View full abstract»

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  • Response of adaptive line enhancer to a sinusoid in lowpass noise

    Publication Year: 1981, Page(s):161 - 166
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (586 KB)

    An adaptive filter configuration, known as the adaptive line enhancer (ALE), has previously been suggested by Widrow et al. for the detection of sinusoidal signals in wideband noise. Very few results are available in the literature on the analysis and performance of the ALE for the case of correlated noise. In the paper we analyse the ALE response to a sinusoid in 1-pole lowpass noise and show tha... View full abstract»

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  • Detection of digital signals transmitted over a known time-varying channel

    Publication Year: 1981, Page(s):167 - 174
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1130 KB)

    A technique has recently been developed whereby it is possible, without undue complexity and without any adaptive linear prefiltering, to achieve near-maximum-likelihood detection of a sampled digital signal, where there is intersymbol interference extending over several samples of the signal. It is, however, important here that the channel impulse response does not undergo large changes with time... View full abstract»

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  • Suppression of ground and weather clutter

    Publication Year: 1981, Page(s):175 - 178
    Cited by:  Papers (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (490 KB)

    It is shown that Weibull-distributed weather clutter obeys a Weibull distribution after passing through a moving target indicator (MTI) processor realised by a double canceller. Both ground and weather clutter can be thus suppressed by using the method of MTI and new Weibull constant false alarm rate (CFAR) systems. View full abstract»

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  • Soft-decision minimum-distance sequential decoding algorithm for convolutional codes

    Publication Year: 1981, Page(s):179 - 186
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1008 KB)

    The maximum-likelihood decoding of convolutional codes has generally been considered impractical for other than relatively short constraint length codes, because of the exponential growth in complexity with increasing constraint length. The soft-decision minimum-distance decoding algorithm proposed in the paper approaches the performance of a maximum-likelihood decoder, and uses a sequential decod... View full abstract»

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  • New notation for phase noise and phase jitter

    Publication Year: 1981, Page(s):187 - 188
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (228 KB)

    A new notation is proposed for use in the discussion and analysis of high-purity signal sources. Omissions in the previously accepted notation are rectified and a consistent set of interrelated symbols is suggested. View full abstract»

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  • Book review: Introduction to Adaptive Arrays

    Publication Year: 1981
    IEEE is not the copyright holder of this material | PDF file iconPDF (107 KB)
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Aims & Scope

The latest version of this title is Radar, Sonar & Navigation, IET.

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