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Proceedings of the IEEE

Issue 10 • Oct 1989

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Displaying Results 1 - 7 of 7
  • Optical neural networks

    Publication Year: 1989, Page(s):1573 - 1583
    Cited by:  Papers (39)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (880 KB)

    Classical optical information processing and classical neural networks can be adapted and combined to create optical neural networks which offer significant and fundamental advantages over electronic neural networks in various well-defined cases. A systematic morphology of optical neural networks is presented. Special problems they create are discussed. The state of the art of their implementation... View full abstract»

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  • Discrete-index Markov-type random processes

    Publication Year: 1989, Page(s):1485 - 1510
    Cited by:  Papers (86)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2156 KB)

    Discrete-index Markov-type random processes in one and two dimensions are considered, with emphasis on two-dimensional processes (or fields). Important classes of Markov-type models, their properties, and their relationship are described. Although some new results are given, the authors mainly present a systematic study and grouping of processes according to two fundamental Markov-type properties:... View full abstract»

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  • Digital computing with optics

    Publication Year: 1989, Page(s):1558 - 1572
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1368 KB)

    Some of the current uses of optics in digital computing such as storage and networking, and the projected uses of optical interconnects are described. Several architectures that are being explored for optoelectronic computing are also described. These architecture are based on either the speed or the parallelism that is possible with optical systems. One or more of these architectures should prove... View full abstract»

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  • Comments, with reply on `Magnetotelluric exploration for hydrocarbons' by A.S. Orange

    Publication Year: 1989, Page(s):1584 - Original paper, Feb 89 287-317
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (80 KB)

    An oversimplification of the treatment of the incidence angle and of the source dependence of magnetotelluric surface impedance in a previous treatment of magnetotelluric exploration of hydrocarbons (see ibid., vol.77, no.2, p.287-317, 1989) is pointed out. The author of the original paper agrees with the comments and recognizes the paper's lack of rigor. He points out that the intent of the paper... View full abstract»

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  • Applications of surface acoustic and shallow bulk acoustic wave devices

    Publication Year: 1989, Page(s):1453 - 1484
    Cited by:  Papers (61)  |  Patents (59)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3076 KB)

    Surface acoustic wave (SAW) device coverage includes delay lines and filters operating at selected frequencies in the range from about 10 MHz to 11 GHz; modeling with single-crystal piezoelectrics and layered structures; resonators and low-loss filters; comb filters and multiplexers; antenna duplexers; harmonic devices; chirp filters for pulse compression; coding with fixed and programmable transv... View full abstract»

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  • Fourier optical signal processors

    Publication Year: 1989, Page(s):1511 - 1527
    Cited by:  Papers (66)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1572 KB)

    Progress in Fourier optical processing techniques is reviewed. Particular emphasis is placed on real-time pattern recognition, which recently has received increased interest as the result of new filter formulations that can be implemented with existing spatial light modulators. Architectures for coherent optical correlation are reviewed, as are the recently reported phase-only filters. Smart filte... View full abstract»

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  • Acoustooptic signal processing and computing

    Publication Year: 1989, Page(s):1528 - 1557
    Cited by:  Papers (22)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2856 KB)

    Acoustooptic techniques have been used to perform computationally intensive signal processing operations and form subsystems of larger signal processing systems. Key aspects of acoustooptic devices and of the range of possible signal processing applications, including the advantages of acoustooptic implementation, are reviewed. Developments that improve acoustooptic device performance, increase sy... View full abstract»

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