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  • Guo, Qinghua  (3)
  • 2005-2009  (3)
  • Engineering  (3)
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  • 2005-2009  (3)
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  • Engineering  (3)
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  • 1
    Online Resource
    Online Resource
    Analysis and design of OFDM‐IDMA systems
    Wiley ; 2008
    In:  European Transactions on Telecommunications Vol. 19, No. 5 ( 2008-08), p. 561-569
    Details
    In: European Transactions on Telecommunications, Wiley, Vol. 19, No. 5 ( 2008-08), p. 561-569
    Abstract: This paper deals with the analysis and design of orthogonal frequency‐division multiplexing interleave‐division multiple‐access (OFDM‐IDMA). We begin with the analysis of the information‐theoretical advantages of non‐orthogonal transmission schemes in fading multiple‐access channels. We then turn attention to practical design issues. A signal‐to‐noise ratio (SNR) evolution technique is developed to predict the bit‐error‐rate (BER) performance of OFDM‐IDMA. This technique is applied to system design and optimisation. Through proper power allocation, OFDM‐IDMA can achieve the multi‐user gain (MUG) predicted by information‐theoretical analysis. It is also an attractive option in compensating for the clipping effect caused by peak‐power limitation. Numerical examples show that OFDM‐IDMA can (i) alleviate the PAPR problem commonly suffered by OFDM‐based schemes; (ii) deliver significant MUG compared with other orthogonal alternatives; (iii) provide robust communications in frequency‐selective channels; and (iv) support high single‐user throughput. Copyright © 2008 John Wiley & Sons, Ltd.
    Type of Medium: Online Resource
    ISSN: 1124-318X , 1541-8251
    URL: Issue
    URL: Article
    DOI: 10.1002/ett.v19:5
    DOI: 10.1002/ett.1304
    RVK:
    ZG 1100
    Language: English
    Publisher: Wiley
    Publication Date: 2008
    detail.hit.zdb_id: 2108576-6
    detail.hit.zdb_id: 2652250-0
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    Online Resource
  • 2
    Online Resource
    Online Resource
    Phase equilibria in the Y–Ti–Si system at 773 K
    Walter de Gruyter GmbH ; 2008
    In:  International Journal of Materials Research Vol. 99, No. 6 ( 2008-06-01), p. 693-695
    Details
    In: International Journal of Materials Research, Walter de Gruyter GmbH, Vol. 99, No. 6 ( 2008-06-01), p. 693-695
    Abstract: Physico-chemical analysis techniques, including X-ray powder diffraction, scanning electron microscopy, optical microscopy and differential thermal analysis were employed in constructing the isothermal section of the Y – Ti – Si system at 773 K. The isothermal section consists of 12 single phase regions, 21 binary phase regions and 10 ternary phase regions. No ternary compound is found in the work. None of the phases in this system reveals a remarkable homogeneity range at 773 K.
    Type of Medium: Online Resource
    ISSN: 2195-8556 , 1862-5282
    URL: Article
    DOI: 10.3139/146.101683
    RVK:
    ZG 1100
    Language: English
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2008
    detail.hit.zdb_id: 2232675-3
    detail.hit.zdb_id: 2128058-7
    detail.hit.zdb_id: 203021-4
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  • 3
    Online Resource
    Online Resource
    Single‐ and multi‐ carrier IDMA schemes with cyclic prefixing and zero padding techniques
    Wiley ; 2008
    In:  European Transactions on Telecommunications Vol. 19, No. 5 ( 2008-08), p. 537-547
    Details
    In: European Transactions on Telecommunications, Wiley, Vol. 19, No. 5 ( 2008-08), p. 537-547
    Abstract: In this paper, we investigate single‐carrier (SC) and multi‐carrier IDMA schemes with cyclic prefixing (CP) and zero padding (ZP) techniques. These schemes are called SC‐IDMA‐CP, SC‐IDMA‐ZP, orthogonal frequency‐division multiplexing (OFDM)‐IDMA‐CP and OFDM‐IDMA‐ZP, respectively. By exploiting the circulant property of channel matrices, the multi‐user detection of these schemes can be efficiently realised with per‐user complexity independent of the number of users and the length of inter‐symbol interference (ISI) channels. We show the potential advantages of ZP‐based schemes in power efficiency and convergence speed. Simulation results are provided to compare the four schemes. Copyright © 2008 John Wiley & Sons, Ltd.
    Type of Medium: Online Resource
    ISSN: 1124-318X , 1541-8251
    URL: Issue
    URL: Article
    DOI: 10.1002/ett.v19:5
    DOI: 10.1002/ett.1266
    RVK:
    ZG 1100
    Language: English
    Publisher: Wiley
    Publication Date: 2008
    detail.hit.zdb_id: 2108576-6
    detail.hit.zdb_id: 2652250-0
    Location Call Number Limitation Availability
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    Online Resource
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