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IEE Proceedings I - Communications, Speech and Vision

Issue 3 • June 1993

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Displaying Results 1 - 8 of 8
  • Timing sensitivity of (MMSE) linear and DF equalisation for digital magnetic recording channels

    Publication Year: 1993, Page(s):169 - 175
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (439 KB)

    The performance of symbol-spaced linear and decision feedback (DF) equalisers for a magnetic recording channel with low-pass and matched filter front-ends is investigated. The optimum sampling phases for these two cases is derived analytically, and the timing sensitivity of the equaliser performance is characterised as a function of the recording density. The robustness of receiver performance wit... View full abstract»

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  • Waveform division multiple-access

    Publication Year: 1993, Page(s):176 - 184
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (671 KB)

    The authors propose a bandwidth-efficient, asynchronous multiple-access technique with superior probability of error performance. The technique, called waveform division multiple-access (WDMA), assigns distinguishable baseband waveforms to the transmitters, and transmissions are asynchronous and occupy the entire available bandwidth. In contrast to direct sequence spread spectrum multiple-access (... View full abstract»

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  • System state-independent-unique-decodable CCMA codes

    Publication Year: 1993, Page(s):185 - 188
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (348 KB)

    Because of the random properties of practical communication networks the unique decoding of CCMA codes should include two steps. First, to identify the current system state, and secondly to uniquely decode the added code-words. When no special information is provided to distinguish different system states, the conventionally defined collaborative coding multiple access (CCMA) codes in most previou... View full abstract»

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  • Time domain algorithms and architectures for Reed-Solomon decoding

    Publication Year: 1993, Page(s):189 - 196
    Cited by:  Papers (11)  |  Patents (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (682 KB)

    Reed-Solomon decoders can be designed using time or frequency domain algorithms. The main advantage of the time domain method is its regular computational structure, an attractive feature for a flexible VLSI implementation. The main disadvantage of this is the relatively high computation count, hence it is important to find a means of reducing the computational complexity of the time domain method... View full abstract»

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  • CSMA/CD protocol for time-constrained communication on bus networks

    Publication Year: 1993, Page(s):197 - 202
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (430 KB)

    A multiple access protocol for transmitting time-constrained packets on bus networks is presented. Based on carrier sense multiple access/collision detection (CSMA/CD) protocol, a new protocol is developed and its performance evaluated by computer simulation. An approximate analysis model for this protocol is also presented. Numerical results indicate that the new protocol achieves a better perfor... View full abstract»

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  • Estimating the impulse response of indoor radio channels using signal subspace techniques

    Publication Year: 1993, Page(s):203 - 210
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (612 KB)

    The technique is based on the use of information-theoretic criteria, a high-resolution spectral analysis technique, and principal component analysis. It is shown that the new technique can be used to overcome difficulties experienced by conventional methods and, as a result, can produce more accurate estimates of the channel parameters. The use of this technique is demonstrated by data analysis us... View full abstract»

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  • Analysis of an optical code division multiple access scheme employing Gold sequences

    Publication Year: 1993, Page(s):211 - 219
    Cited by:  Papers (1)  |  Patents (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (843 KB)

    A coherent optical CDMA network employing Gold sequences for the encoding operation is analysed, and its performance is evaluated in the presence of shot noise and employing the exact distribution for the interfering components. Spreading and despreading are performed directly in the optical domain by means of a lithium niobate Mach-Zehnder phase modulator. BPSK and OOK modulation formats are cons... View full abstract»

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  • Optical TDM switching architectures with reduced control complexity

    Publication Year: 1993, Page(s):220 - 228
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (824 KB)

    Architectures for optical TDM switching with low control complexity, which would be suitable for implementation with lithium niobate switches and fibre delay lines, are discussed. The networks are mathematically equivalent to strict sense nonblocking Cantor networks, and use the same control algorithm. The penalty paid for low control complexity is a large number of components. All such networks u... View full abstract»

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