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Electrical and Computer Engineering, Canadian Journal of

Issue 3 • Date July 1991

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Displaying Results 1 - 14 of 14
  • Canadian Journal of Electrical and Computer Engineering - Front cover

    Page(s): c1
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    Freely Available from IEEE
  • Inside front cover

    Page(s): c2
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    Freely Available from IEEE
  • Table of contents

    Page(s): 1
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    Freely Available from IEEE
  • Annual meeting

    Page(s): 82
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    Freely Available from IEEE
  • The R.A. Ross medal — 1991 winner

    Page(s): 83
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    The 1991 Ross Medal has been awarded to Captain Michel J.J. Drapeau. View full abstract»

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  • Electrical engineer wins Athlone-Vanier fellowship

    Page(s): 83
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    Frederick Cote, B. Eng., Royal Military College of Canada, received one of three $24,000 fellowships awarded in 1990 to Canadian engineering graduates, to pursue postgraduate studies in engineering in the United Kingdom. View full abstract»

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  • Anik E command link security

    Page(s): 84 - 86
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    Canada is becoming increasingly dependent on satellites for communications links between remote communities and major cities. The loss of one of them is hard to evaluate, but would certainly be catastrophic. Consequently, they have become vital points requiring appropriate protection from hostile organizations. The author covers the different measures that were integrated into the Anik E telemetry, tracking and command system in order to encrypt the commands and to place the command link in a narrow spot beam focused on the legitimate ground stations. View full abstract»

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  • Coding, diversity and minimum distance

    Page(s): 87 - 92
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    Low rate codes are sometimes used on channels that exhibit severe fading or interference. Such a low rate code may be obtained by designing a code with that rate and maximum minimum distance, or by using a higher rate code and diversity. The latter approach is usually suboptimal from a minimum distance point of view, but may have implementation advantages. The authors consider this trade-off between coding and diversity, in terms of minimum distance, for both block and convolutional codes. It is concluded that for many applications of convolutional codes, there is little performance loss in achieving the low rate code with diversity and coding. The same does not seem to hold true for block codes. This situation is quantified further in the paper. View full abstract»

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  • Highly parallel architecture for the least mean squares (LMS) algorithm

    Page(s): 93 - 104
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    A fast digital implementation for the least mean squares algorithm is proposed. The high concurrency of its structure allows for high processing speed with a sampling period of O(log N), where N is the number of filter taps. Chip area is minimized by the use of serial-parallel multipliers. In these multipliers, which use redundant arithmetic, the serial variables are transferred digit by digit, the most significant first. View full abstract»

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  • An adaptive minimum redundancy array for digital communications

    Page(s): 105 - 111
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    The performance of a minimum redundancy array (MRA) used in conjunction with an adaptive combiner for receiving digital communications signals under co-channel interference and multipath conditions is compared with a similar system based on a uniform array. Simulation and analysis of four-element array-based systems indicate that for interference in close angular proximity to the desired signal, or for multiple paths which show small angular separation, the MRA-based system is superior. Using numerical integration techniques, it is shown that the overall bit error probability is smaller using the MRA-based system than with the uniform-array-based system. View full abstract»

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  • New low-sensitivity and low-noise GIC digital filter structures

    Page(s): 112 - 117
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    New digital filter structures based on the concept of generalized-immittance convertors (GICs) are proposed. These structures are shown to possess better sensitivity and noise properties than the already known GIC structures. A comparison study is carried out using different types of sensitivity and noise measures. Further, it is shown that the limit cycles under zero-input and forced response conditions can be eliminated in the proposed filters. With suitable modifications, these filters can be stabilized against constant-input limit cycles as well. View full abstract»

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  • Horizontal demand prefetching: A novel approach to eliminating the jump problem

    Page(s): 118 - 124
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    The principle of a novel prefetching strategy, horizontal demand prefetching, is presented. This mechanism allows deep prefetching without jump-related misses by prefetching shallowly across several independent streams in a horizontal fashion. Multistream processors using this technique can achieve very high memory utilization. The mechanism supports very efficient multitasking and hardware process synchronization. The structure and performance of a prototype minicomputer using this mechanism are presented. View full abstract»

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  • [Back inside cover]

    Page(s): c3
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    Freely Available from IEEE
  • [Back cover - [advertisement]]

    Page(s): c4
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Aims & Scope

The role of the Canadian Journal of Electrical and Computer Engineering is to provide scientific and professional activity for its members in Canada, the CJECE complements international journals and will be of particular interest to anyone involved in research and development activities in the field of electrical and computer engineering.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Dr. Shahram Yousefi
Dept. of Electrical and Computer
     Engineering
Queen's University