Wireline Communications

  • An online book project resulted from the course, which is occasionally extended in student projects.










    Instructor:  Prof. Dr.-Ing. Werner Henkel

    Starting from basic knowledge in Digital Communications, the Wireline Communications course discusses Digital Subscriber Line transmission in quite some detail, still providing insights into counterpart wireless transmission schemes, such as WLAN and DVB-T. In order to obtain the basic foundation for digital communications, the course discusses matched filter, whitened matched filter, equalizer structures (linear, DFE, Tomlinson-Harashima) and equalizer adaptation with zero forcing and MMSE/LMS. These concepts are applied to baseband and single-carrier transmission. Multicarrier transmission (OFDM/DMT) as the most current technology in wireline and wireless transmission is treated thoroughly.

    The wireline channel will be highlighted. Starting from channel properties of twisted pair and coaxial cables, all current wireline transmission methods are studied in detail. Although the focus will be on twisted-pair transmission, cable modems (including hybrid fiber-coax) are touched, as well. In DSL and cable modems, we find almost every transmission method, like PAM, QAM, CAP, and multicarrier.

    Lecture at Jacobs University. [Campusnet link]


    •   Transmission characteristics of the symmetrical pair (transfer function, NEXT, FEXT, RFI, impulse noise)
    •   Transmission methods (ISDN, HDSL, SDSL, ADSL, VDSL)
    •   ADSL in detail (bit allocation, equalization in time and frequency domain,  PAR reduction, start-up, synchronization, ADSL variants,   differences between ADSL and VDSL)
    •   Channel encoding in xDSL (trellis-coded modulation, Reed Solomon code,   ‘ Turbo ‘ – and LDPC codes)
    •   Dynamic Spectrum Management
    •   Multiple-Input Multiple-Output Systems
    •   Provisioning problems
    •   Single- and double-ended loop testing
    •   Protocol aspects
    •   Services
    •   Standardization (ETSI, ANSI, ITU-T)
    •   Other competing access technologies: cable modems, Wireless LANs, UMTS

  • [DSL Book] Student book project on DSL.

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