By Topic

Communications, Radar and Signal Processing, IEE Proceedings F

Issue 6 • Date October 1987

Filter Results

Displaying Results 1 - 16 of 16
  • Editorial

    Publication Year: 1987
    IEEE is not the copyright holder of this material | PDF file iconPDF (122 KB)
    Freely Available from IEEE
  • Spatial correlation in K-distributed sea clutter

    Publication Year: 1987, Page(s):526 - 532
    Cited by:  Papers (24)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (921 KB)

    The compound K-distribution model for sea clutter previously described in the literature provides the foundation for a quantitative treatment of the spatial and temporal correlation characteristics of the envelope of clutter returns. In the paper the compound K-distribution model is extended to cover the spatial characteristics of sea clutter. The relationship of these characteristics to the physi... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Erratum: Subscriber loop noise measurements and calibration

    Publication Year: 1987
    IEEE is not the copyright holder of this material | PDF file iconPDF (127 KB)
    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Noiseless encoding of speech signals

    Publication Year: 1987, Page(s):533 - 538
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (735 KB)

    Noiseless encoding strategies based on conditional entropy encoding are proposed for 8-bit ¿¿-law PCM speech, with ¿¿ = 255. Specifically, we formulate the conditional probabilities of the current and previous PCM samples to generate the codebook employed in the noiseless encoding process. In addition, we consider a second-order conditional entropy encoding scheme which, when coupled with a state-... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Transmission of log-PCM via QAM over Gaussian and Rayleigh fading channels

    Publication Year: 1987, Page(s):539 - 556
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1895 KB)

    The digital noise power due to transmission errors is determined for 8-bit ¿¿-law PCM, ¿¿ = 255, signals transmitted via M-level QAM, M = 16, 64 and 256, over Gaussian and Rayleigh fading channels. The analytical results apply for various laws that map the 8-bit ¿¿-law PCM signal into the QAM format, and for different binary Gray codes used to represent the QAM signal points. In addition to the th... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Logarithmic PCM weighted QAM transmission over Gaussian and Rayleigh fading channels

    Publication Year: 1987, Page(s):557 - 570
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1537 KB)

    The transmission of 8-bit ¿-law PCM signals using M-level weighted QAM (WQAM), M =16, 64 and 256, over Gaussian and Rayleigh fading channels is examined. The weighting process modifies the positions of the QAM constellation points so that the overall distortion in the recovered information-bearing source signal is reduced. The PCM bits are mapped to the WQAM points such that the most significant ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Limiting error bounds for the continuous channel

    Publication Year: 1987, Page(s):571 - 582
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1336 KB)

    The paper presents an approach by which absolute error bounds may be derived for the continuous channel, thus determining the limits of the performance of a modulation and coding scheme. The code is considered as a set of points in n-dimensional space, and the concept of a sphere-packing in n dimensions based on the regular simplex is used to determine the maximum packing density. The effect of co... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Prediction of attenuation on satellite-earth links in the European region

    Publication Year: 1987, Page(s):583 - 596
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1621 KB)

    A new method for predicting attenuation on satellite-earth links is applied throughout the European region. Sources of long-term point rainfall data required for the method are identified, and the approach to compiling a rainfall intensity database is described (including conversion techniques for integration time, which are developed and tested). A technique for predicting effective rain height f... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Trigonometric high-resolution method to resolve two close targets

    Publication Year: 1987, Page(s):597 - 601
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (485 KB)

    Three-subaperture methods for estimating the elevation angles of two targets within the 3 dB beamwidth for the main aperture of a linear array are discussed and applied to the case of a radar target in the presence of multipath over a smooth surface. Simulation results and comparison with the three-subaperture maximum-likelihood estimator by Cantrell et al. are presented. A four-subaperture techni... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Asymptotically optimum detection of fluctuating targets in non-Gaussian interference

    Publication Year: 1987, Page(s):602 - 608
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (815 KB)

    The design of asymptotically optimum detectors (AODs) is considered for a class of fluctuating targets in non-Gaussian interference, as a reasonable alternative to optimum (Neyman-Pearson) detectors, which prove hopelessly complex. The useful signal is modelled as an incoherent train with constant amplitude or with fluctuating amplitude, either from scan to scan or from pulse to pulse. The AOD str... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Book review: Advanced Digital Communication: Systems and Signal Processing Techniques

    Publication Year: 1987
    IEEE is not the copyright holder of this material | PDF file iconPDF (99 KB)
    Freely Available from IEEE
  • Antenna elements for improved shipboard HF direction-finding

    Publication Year: 1987, Page(s):609 - 614
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (711 KB)

    The situation of shipboard DF antennas is briefly analysed. It is shown that DF errors are worst within the HF range, and then especially to port and starboard. It is shown that this region can be covered by a parallel loop arrangement which must be kept `blind¿¿ to the main reradiating structures in addition to the conventional crossed loop DF. Theoretical considerations prove that all structures... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Book review: Radio Receivers

    Publication Year: 1987
    IEEE is not the copyright holder of this material | PDF file iconPDF (163 KB)
    Freely Available from IEEE
  • Optimisation of centroiding procedure for noisy measurements

    Publication Year: 1987, Page(s):615 - 619
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (500 KB)

    A centroiding algorithm for the refinement of coarse noisy measurements (e.g. spectral or range samples) is proposed and analysed. In contrast to the current algorithms which use constant centroiding weights, in our method the coefficients are chosen using a priori information about the noise level. The criterion for selection of the optimal weights is the minimisation of the estimate error for th... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Monogenic function range resolution radar

    Publication Year: 1987, Page(s):620 - 628
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (978 KB)

    Sequences having peaky autocorrelation are useful in range resolution radar and in a homomorphic problem of detecting reflections in seismic exploration. The concept of correlative signal processing for system identification in these applications is extended here to processing based on monogenic signatures. Some sequences having good monogenic signatures are listed. These yield sequence compressio... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Binary-decision approach to fast Chien search for software decoding of BCH codes

    Publication Year: 1987, Page(s):629 - 632
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (539 KB)

    A fast decoding algorithm for binary double error-correcting BCH codes is presented. A binary-decision approach to the Chien search is introduced to reduce the search time by a factor of two, and hence to increase the decoding speed. This algorithm is suitable for microprocessorbased implementation. An illustrative design of a (128, 112, 2) binary BCH decoder using the 16-bit 8086 microprocessor i... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.

Aims & Scope

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

Full Aims & Scope