Colloquium: Ivan B. Djordjevic

    Thursday, October 2, 2014 - 3:30pm - 5:00pm
    Meinel 307

    "Advanced Forward Error Correction and Coded Modulation for Ultrahigh-Speed Optical Transport"


    This talk presents an overview of advanced forward error correction and coded modulation for optical communications.

    It describes the following ultrahigh-speed optical transport enabling techniques: codes on graphs (turbo-product and low-density parity-check codes), rate-adaptive CM and turbo equalization. Given the high potential of LDPC codes, several binary LDPC-decoding algorithms are described, and field-programmable gate array implementation is discussed. 

    We then demonstrate that several recently proposed attractive LDPC codes could in fact be represented as special instances of irregular quasicyclic-LDPC codes from pairwise balanced designs. In addition, we describe several LDPC-coded modulation schemes, including hybrid multidimensional CM, block-interleaved CM, multilevel coding, nonbinary LDPC-CM and multilevel NB-LDPC-CM. We also demonstrate the application of turbo equalization in high-speed optical transmission to deal with fiber nonlinearities. 

    An optimum signal constellation design approach as well as an optimum mapping rule has been discussed.

    Speaker Bio(s): 

    Ivan B. Djordjevic is a tenured associate professor in electrical and computer engineering in the College of Engineering at the University of Arizona, with a joint appointment in the College of Optical Sciences. Prior to joining the University of Arizona, he was with the University of Bristol and the University of the West of England in the United Kingdom; Tyco Telecommunications in Eatontown, New Jersey; the National Technical University of Athens, Greece; and State Telecommunication Co. of Nis, Serbia. During 2013, he was also with Darmstadt University of Technology in Germany while on sabbatical. Djordjevic is an author or co-author of four books, over 360 international journal/conference publications and 26 U.S. patents. Djordjevic serves as an associate editor for three journals.