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Radio and Electronic Engineer

Issue 11 • Date November 1974

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Displaying Results 1 - 15 of 15
  • Exploiting research

    Publication Year: 1974
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  • Unsupervised learninig and detection of pulse signals

    Publication Year: 1974 , Page(s): 583 - 591
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (1143 KB)  

    This Paper describes an adaptive learning system for the estimation and detection of a pulse type signal of known duration but unknown shape or epoch, randomely occuring in white Gaussuion noise. A combination of energy detectio and cross correlation is used to build up estimates of the signal. Result are presented for different signal shapes showing that error rate approaches that of the ideal matched filter. the system is intended for on-line real-time implementation. the system has potential applications to medical signal processing. View full abstract»

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  • Eigenvalues for a trapezoidal waveguide

    Publication Year: 1974 , Page(s): 593 - 596
    Cited by:  Papers (3)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (517 KB)  

    The egienvalue solution for modes propagating in a trappezoidal waveguide is derived using Schwarz's iterative method of overlapping regions. The technique involves matching the field expansion of each two overlapping regions on one boundary of the overlapping region and using field continuity on the other boundary to couple the successive iterations. The method is efficient and provides accurate results for the eigenvalues of the dominant and first few higher order modes. Numerical results are presented for the isosceles trapezoidal waveguide case, where the solution is simplified by making use of symmetry planes. View full abstract»

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  • Tabulation of characteristics and active network design values for cauer elliptic function filters of order 2 to 9

    Publication Year: 1974 , Page(s): 597 - 604
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (652 KB)  

    Design values are given for active elliptic function filters realized with biquadratic sections in tandem; for networks of odd-order there is an additional linear section. The complete set of tables contains sixteen separate designs for filters of each order from second to ninth, with attenuation and phase characteristics for each design. Only one network order (8th) is included here: the full paper containing all the tables is published separately. View full abstract»

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  • A sonar aid to enhance spatial perception of the blind: engineering design and evaluation

    Publication Year: 1974 , Page(s): 605 - 627
    Cited by:  Papers (30)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (3200 KB)  

    The design of an air sonar device with a new form of binaural display is described which aids the blind in perceiving their environment. Some of the limitations of knowledge of human perception and the influence this has on a specification for the device are discussed. Inherent limitations in the binaural aid both in terms of technology development and performance are also explained. The paper described what is expected of the man-machine control system in a mobility setting and discusses the technique of evaluating a manmachinesystem so as to assess the machine performance. View full abstract»

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  • IERE News and Commentary

    Publication Year: 1974 , Page(s): 628 - 631
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    Freely Available from IEEE
  • International Broadcasting Convention 1974

    Publication Year: 1974 , Page(s): 632 - 634
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  • Qualifications of an engineer

    Publication Year: 1974
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  • `Start again?¿

    Publication Year: 1974
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  • Electronic tuning of musical instruments

    Publication Year: 1974
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  • Thomas Henry Pattinson

    Publication Year: 1974
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    Freely Available from IEEE
  • Donald Charles Harrison

    Publication Year: 1974
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    Freely Available from IEEE
  • William John Alastair Lewis, B.Sc. (Eng.)

    Publication Year: 1974
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  • Lawrence Olusesan Olubajo

    Publication Year: 1974
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    Freely Available from IEEE
  • David Malcolm Jaggar

    Publication Year: 1974
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    Freely Available from IEEE