Wide-Band Digital Subscriber Access with Multidimensional Block Modulation and Decision-Feedback Equalization

David W. Lin*

*此作品的通信作者

    研究成果: Article同行評審

    11 引文 斯高帕斯(Scopus)

    摘要

    The author investigates the potential transmission performance of pair-wire subscriber lines at the higher rate of 800 kb/s, with particular reference to digital subscriber line transmission for ISDN (integrated services digital network) basic access. Block modulation schemes of 1-4 dimensions, at a rate of 2 bits per dimension, are considered. Time-division multiplexing is used to combine the multiple dimensions for transmission over a single-waveform channel, namely, the subscriber line. The channel noise is assumed to be additive and dominated by near-end crosstalk. MMSE (minimum mean-squared error) decision-feedback equalization is used to deal with the noise and the intersymbol interference. Using the theory developed, the potential performance of some simple lines is calculated. The coding gain of a multidimensional modulation scheme is found to be fully preserved after transmission if the equalizer is infinite in length. However, the gain realized can be much lower, or none at all, if the equalizer is only moderate in length. This latter phenomenon is due to the fact that the noise at the decision point is coloured, due to the inability of the equalizer to whiten it sufficiently.

    原文English
    頁(從 - 到)996-1005
    頁數10
    期刊IEEE Journal on Selected Areas in Communications
    7
    發行號6
    DOIs
    出版狀態Published - 8月 1989

    指紋

    深入研究「Wide-Band Digital Subscriber Access with Multidimensional Block Modulation and Decision-Feedback Equalization」主題。共同形成了獨特的指紋。

    引用此