IEE Proceedings I (Communications, Speech and Vision)

IEE Proceedings I (Communications, Speech and Vision)

Online ISSN 2053-9053
Print ISSN 0956-3776

Published from 1989-1993, IEE Proceedings I contained significant and original contributions on communications, speech and vision.

This journal was previously known as IEE Proceedings F (Communications, Radar and Signal Processing) 1980-1988. ISSN 0143-7070. more..

This journal was previously known as IEE Proceedings - Communications 1994-2006. ISSN 1350-2425. more..

This journal was previously known as IEE Proceedings - Vision, Image and Signal Processing 1994-2006. ISSN 1350-245X. more..

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Two-level decoding of (32, 16, 8) quadratic residue code
- Author(s): J. Yuan ; C.S. Chen ; S. Ma
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- p. 409 –414 (6)
  The Pless construction of the (24, 12, 8) extended Golay code can be modified to construct the (32, 16, 8) extended QR code. Some structural similarities are discovered between the (32, 16, 8) QR code and the (24, 12, 8) Golay code. A simple decoder is developed based on the two-level structure of the (32, 16, 8) QR code. In addition to correcting all three or less bit errors, the proposed algorithm is able to correct some four-bit error patterns. Recently, soft-logic decoding of block codes has found increasing practical applications. The two-level structure renders an extension of Vardy and Be‘ery’s fast algorithm to the (32, 16, 8) QR code. The Vardy-Be‘ery’s algorithm is, so far, the most efficient scheme for the Golay code in the literature, with direct application impact. Its extension to the (32, 16, 8) code is also computationally efficient, as analysed in detail.
New LSP encoding method based on two-dimensional linear prediction
- Author(s): C.-C. Kuo ; F.-R. Jean ; H.-C. Wang
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- p. 415 –419 (5)
  A new line spectrum pair (LSP) encoding method, two-dimensional differential LSP (2DdLSP) coding, is proposed. This 2DdLSP approach simultaneously takes advantage of strong interframe and intraframe correlation of LSP parameters. The parameters to be quantised are the prediction residuals which possess the property of smaller variance than LSP parameters. This is the key point for the success of the 2DdLSP method. Three quantisation schemes, a scalar quantisation and two vector quantisations (VQs), are presented. The best result in simulation is achieved by using the product codebook VQ. A spectral distortion of 1 dB² at 19 bits per frame can be obtained when the frame period is 10 ms. Both within-training and out-of-training tests have demonstrated the robustness of the proposed method to data variation.
Multilayer perceptron based decision feedback equalisers for channels with intersymbol interference
- Author(s): M. Meyer and G. Pfeiffer
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- p. 420 –424 (5)
  The paper describes the application of multilayer perceptrons to the problem of adaptive channel equalisation in digital communications systems. In particular, the use of decision feedback structures is investigated for time-invariant and time-variant bandlimited channels. Simulation results show that the equaliser based on the multilayer perceptron provides better bit error rate performance compared with the conventional decision feedback equaliser if the equaliser length corresponds to the time spread of the channel. Increasing the equaliser length leads to equivalent bit error rates for the decision feedback and the multilayer perceptron based equaliser. Because of the more complex structure of the multilayer perceptron its adaptive behaviour for time-variant channels is inferior compared with the decision feedback equaliser. Nonlinearities on the transmission channel can be equalised much better by the multilayer perceptron based equaliser.
Codeword synchronisation of CCMA scheme
- Author(s): J. Ni
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- p. 425 –428 (4)
  A kind of codeword synchronisation scheme in decoding adder channel CCMA sequence is presented. By making use of the correlation between adjacent added codewords and the shifting properties of the received sequence, the scheme can provide very good codeword synchronisation information about the received data stream. Simulated results in various noisy environments show that the scheme is very effective.
HiMA: a hierarchical and modular ATM switch with partially shared output buffer
- Author(s): Z. Tsai ; K. Yu ; F. Lai
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- p. 429 –435 (7)
  The authors propose a hierarchical and modular ATM switch. To improve the queueing performance, they adopt the output queueing technique and allow several outputs to partially share the same output buffer space. The performance of the proposed switch is evaluated under uniform and nonuniform traffic patterns. Comparisons with the knockout switch, recursive switch, SCOQ, and Christmas-tree switch show that, in terms of complexity, crosspoint count, scalability and synchronisation, the proposed switch is superior.

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IEE Proceedings I (Communications, Speech and Vision)

Volumes & issues:

Volume 140 (1993)

Volume 139 (1992)

Volume 138 (1991)

Volume 137 (1990)

Volume 136 (1989)

Latest content

Two-level decoding of (32, 16, 8) quadratic residue code

New LSP encoding method based on two-dimensional linear prediction

Multilayer perceptron based decision feedback equalisers for channels with intersymbol interference

Codeword synchronisation of CCMA scheme

HiMA: a hierarchical and modular ATM switch with partially shared output buffer

Most viewed content for this Journal

Most cited content for this Journal