A. Almulhem

University of Victoria, Victoria, British Columbia, Canada

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Publications (4)0 Total impact

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    ABSTRACT: Congestion in ATM communications is a significant issue as it can have a dramatic effect on critical or real-time data. Forward error correction (FEC) can be used to decrease or eliminate this effect. Conventional FEC has a uniform error correction capability, which can result in poor bandwidth utilization. Adaptive FEC is more suitable because it allows a different quality of service for each data type. In this paper a versatile adaptive FEC technique is proposed. It is shown that this technique can decrease the effect of congestion and increase the channel utilization
    Electrical and Computer Engineering, 1996. Canadian Conference on; 06/1996
  • A. Almulhem, F. El-Guibaly
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    ABSTRACT: ATM relies on very low error rate fiber-optic cables for cell transport. Very soon, ATM will be used over wireless and satellite channels. These upcoming channels will add noise which contribute to cell loss besides congestion. Time-sensitive (delay-critical) applications suffer the most due to cell loss. This imposes more resources to be allocated which might be costly and not desired. Automatic repeat request (ARQ) and forward error correction (FEC) schemes are proposed as alternatives to overcome congestion or reduce its effect. FEC is more advantageous since it potentially requires less resources to be allocated and hence simpler ATM switch design. Hardware requirements such as buffer size are even less than with conventional ATM switches. Two ATM switch designs are discussed; one is suitable for wireless communications and the other is suitable for time-sensitive data
    Electrical and Computer Engineering, 1996. Canadian Conference on; 06/1996
  • [Show abstract] [Hide abstract]
    ABSTRACT: Congestion in ATM communications is a significant issue as it can have a dramatic effect on critical or real-time data. Forward error correction (FEC) can be used to decrease or eliminate this effect. Conventional FEC has a uniform error correction capability, which can result in poor bandwidth utilization. Adaptive FEC is more suitable because it allows a different quality of service for each data type. In this paper a versatile adaptive FEC technique is proposed. It is shown that this technique can decrease the effect of congestion and increase the channel utilization
    Southeastcon '96. 'Bringing Together Education, Science and Technology'., Proceedings of the IEEE; 05/1996
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    ABSTRACT: The CORDIC algorithm is a special purpose algorithm which can get an accurate result for trigonometric and hyperbolic functions with a limited number of simple iteration. We modify the classic algorithm to reduce the number of iterations which reduces rounding noise. The modified algorithm is illustrated and simulation results are presented
    Communications, Computers, and Signal Processing, 1995. Proceedings. IEEE Pacific Rim Conference on; 06/1995