Date/Time: Thursday, Sep 28, 3:00-4:00 pm

Location: Carleton University, 4359 ME (Mackenzie Building). Map.


Speaker: Dr. Michel Kulhandjian, Research Scientist, School of Electrical Engineering and Computer Science, University of Ottawa

ABSTRACT: We consider the problem of designing a sparse code multiple
access (SCMA) codebook that is based on permutation. Conventional SCMA
is a multidimensional codebook-based non-orthogonal spreading
technique, in which each layer of incoming bits is directly mapped to
multidimensional codewords which have nonzero entries on the same
resources. In this paper, unlike the traditional SCMA scheme, the data
bits to be transmitted determine the nonzero entry locations based on
the permutation. The proposed SCMA codebooks are converted to a
multiuser code-division multiple-access (CDMA) detection system before
applying an iterative decoder. The complexity of the proposed
iterative decoder is lower in comparison to exponential message
passing algorithm (MPA) and outperforms in terms of bit-error-rate

Speaker bio: Michel K. Kulhandjian is a Research Scientist in the School of
Electrical Engineering and Computer Science at the University of
Ottawa. His currently working on investigating new encoding and
decoding schemes for Sparse Code Multiple Access (SCMA) in
collaboration with Prof. Claude D’amours. He is also employed as an
embedded software designer at Harris Corporation in Ottawa, where he
is working on designing and developing software platform for
Air-to-Ground, Ground-to-Ground IP-based ATM voice communication
systems. He received his M.S. and Ph.D. degrees in Electrical Engineer
from the State University of New York at Buffalo in 2007 and 2012,
respectively. He had previously received his B.S. degree in
Electronics Engineering and Computer Science (Minor), with “Summa Cum
Laude” from the American University in Cairo (AUC) in 2005. He was
employed at Alcatel-Lucent, in Ottawa, Ontario, in 2012, to conduct
R&D in the area of Next Generation Cloud Based Wireless Network
Architecture. In the same year he was appointed as a Research
Associate at EION Inc. He received Natural Science and Engineering
Research Council of Canada (NSERC) Industrial R&D Fellowship (IRDF) to
research on reliability and enhancement and performance optimization
of broadband wireless networks.

His research interests include wireless multiple access
communications, sparse code multiple access (SCMA), signature waveform
design for overloaded code-division multiplexing applications,
adaptive multiuser detection, statistical signal processing, covert
communications, spread-spectrum steganography and steganalysis. Dr.
Kulhandjian serves as a member of Technical Program Committee (TPC) of
IEEE International Conference on Wireless and Mobile Computing and
Communications (WiMob2017), IEEE Globecom 2017, IEEE International
Conference on Communications (ICC2018-CQRM, ICC2016-CQRM), IEEE
Vehicular Technology Conference (VTC2016-Spring, VTC2015-Fall,
VTC2013-Fall, and VTC2012-Fall).

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