Prof. Ranjan K. Mallik (Fellow, IEEE) of Indian Institute of Technology (IIT) Delhi

Optimum and suboptimum receivers for a partially noncoherent single-input multipleoutput (SIMO) amplitude-shift keying (ASK) system in Rayleigh fading, that only require limited channel state information based on the channel norm, are introduced. The importance of these low complexity channel norm-based energy detection (CNBED) receivers is that they achieve the same diversity order as that of a coherent receiver. Furthermore, their performance degradation when compared to a coherent receiver can be made su:iciently low by appropriate choice of parameters. The CNBED techniques have potential applications to internet of things. For the optimum receiver, an analytical approximation of the symbol error probability (SEP) as a sum of univariate integrals involving averaging of Gaussian Q-functions is derived. For the suboptimum receiver, closed form expressions for the exact SEP and for the approximate SEP under the condition of high signal-to-noise ratio (SNR) are obtained; in addition, using asymptotic approximations, expressions for the optimal ASK transmit levels with high SNR and large number of receive diversity branches, that minimize the SEP subject to an energy constraint, are found.

Biography:

Ranjan K. Mallik (Fellow, IEEE) is a Professor in the Department of Electrical Engineering, Indian Institute of Technology (IIT) Delhi and a J. C. Bose National Fellow. He received the B.Tech. degree from IIT Kanpur and the M.S. and Ph.D. degrees from the University of Southern California,  Los Angeles, all in electrical engineering. He has worked as a scientist in the Defence Electronics Research Laboratory, Hyderabad, India, and as a faculty member in IIT Kharagpur and IIT Guwahati. His research interests are in diversity combining and channel modeling for wireless communications, space-time systems, cooperative communications, multiple-access systems, power line communications, molecular communications, terahertz communications, difference equations, and linear algebra. He is a recipient of the Shanti Swarup Bhatnagar Prize, the Dr. Vikram Sarabhai Research Award, the Khosla National Award (by IIT Roorkee), the Prof. P. C. P. Bhatt Faculty Research Award (by IIT Delhi), the IEI-IEEE Award for Engineering Excellence, and the J. C. Bose Fellowship. He is a member of Eta Kappa Nu, and a fellow of IEEE; TWAS; the Indian National Academies INAE, INSA, NASI, and IASc; and Asia-Pacific Artificial Intelligence Association. He served as an Area Editor and an Editor for the IEEE Transactions on Wireless Communications, and as an Editor for the IEEE Transactions on Communications. He was a Technical Program Committee (TPC) Co-Chair for the Wireless Communications Symposium of GLOBECOM 2008 and ICC 2010, a TPC Co-Chair for the PHY Track of WCNC 2013, and a TPC Co-Chair for the Communication Theory Symposium of ICC 2021. He also served as the Treasurer of the IEEE Delhi Section during 2005-2006, as a member of the IEEE ComSoc Awards Standing Committee during 2015-2017, and as a member of the IEEE ComSoc Fellow Evaluation Standing Committee during 2022-2024.

Address:New Delhi, India