Rakhesh Singh Kshetrimayum Author of Evaluating Organization Development
FEATURED AUTHOR

Rakhesh Singh Kshetrimayum

Professor
IIT Guwahati

Rakhesh Singh Kshetrimayum is a Professor in the department of EEE, IIT Guwahati. He received the Ph.D. degree from the School of EEE, NTU Singapore. Prior to joining IIT Guwahati, he did Postdoctoral research from the department of EE, Pennsylvania State University USA (2005) and the department of ECE, IISc Bangalore (2004-2005). He is a Fellow of the IET and a Senior Member of the IEEE.

Biography

Rakhesh Singh Kshetrimayum is a Professor in the department of EEE, Indian Institute of Technology (IIT) Guwahati. He received the Ph.D. degree from the School of EEE, Nanyang Technological University (NTU) Singapore. Prior to joining IIT Guwahati in 2005 as a faculty member, he did Postdoctoral research from the department of EE, Pennsylvania State University USA (2005) and the department of ECE, Indian Institute of Science (IISc) Bangalore (2004-2005). He has chaired several international conferences including National Conference on Communications (NCC) 2016, Guwahati (TPC chair). He is on the Editorial Board of many international journals including IET Journal of Engineering (Associate Editor). Prof. Kshetrimayum is the recipient of multiple awards including IETE S. K. Mitra Memorial Award (2017). His current areas of research interests are in microwave/millimeter wave antennas/circuits, UWB communications & MIMO wireless communications. He is a Fellow of the IET and a Senior Member of the IEEE.

Areas of Research / Professional Expertise

    Printed antennas, Passive microwave devices and MIMO wireless communications

Websites

Books

Featured Title
 Featured Title - MIMO Wireless Communications over Generalized Fading Channel - 1st Edition book cover

Articles

IEEE Sensors Letters

Performance Analysis of B2B Communication for Different Sporting Activities


Published: Jul 14, 2019 by IEEE Sensors Letters
Authors: A. Bhowal and R. S. Kshetrimayum

In this article, body-to-body (B2B) communication has been investigated for different sporting activities in different scenarios. The B2B system performance has been analyzed in terms of outage probability and average symbol error probability (ASEP).

 IET Optoelectronics

Outage Probability Bound of Decode and Forward Two Way Relay employing Optical Spatial Modulation over Gamma-Gamma Channels


Published: Jan 25, 2019 by IET Optoelectronics
Authors: A. Bhowal and R. S. Kshetrimayum

: In this paper, free space optical (FSO) communication has been studied for different atmospheric conditions. Spatial modulation (SM) has been used to improve the performance of two way relay cooperative communication. The proposed system employs decode and forward (DF) relaying technique along with physical layer network coding (PLNC), hence it has been named as optical spatial modulation (OSM) based decode and forward two way relay (DFTWR).

OSA Continuum

Performance Analysis of One-way and Two-way relay for Underwater Optical Wireless Communications


Published: Dec 13, 2018 by OSA Continuum
Authors: A. Bhowal and R. S. Kshetrimayum

In this paper, the amplify and forward (AF) cooperative technique for one- and two-way relays has been implemented for underwater optical wireless communication (UOWC). UOWC suffers from scattering, absorption, and turbulence effects. The distance of communication between UOWC devices is typically within the range of 100 m. So relay-based UWOC has been proposed to improve the performance of device-to-device (D2D) based UWOC by increasing the effective link range.

 International Journal of Communication Systems

Outage probability bound of decode and forward two‐way full‐duplex relay employing spatial modulation over cascaded α − μ channels


Published: Dec 12, 2018 by International Journal of Communication Systems
Authors: A. Bhowal and R. S. Kshetrimayum

The system performance of mobile‐to‐mobile (D2D) cooperative communication has been improved by utilizing spatial modulation (SM) in this paper. The proposed system employs decode and forward (DF) relaying technique along with physical layer network coding (PLNC); hence, it has been named as SM‐based decode and forward two‐way relay (DFTWR). It enables full‐duplex communication thereby enhancing the system efficiency. Information bits are exchanged between the two bidirectional nodes.

IETE Technical Review

TAS/MRC based Two Hop UWB System Over IEEE 802.15.4a Channel Model


Published: Jun 06, 2017 by IETE Technical Review
Authors: A. Agrawal and R. S. Kshetrimayum
Subjects: Engineering - Electrical

In this paper, we calculate the bit error rate (BER) of the orthogonal binary signals in the two hop Ultra-wideband (UWB) communication system with the transmit antenna selection scheme at the source and the relay terminals. In the two hop UWB system relay is configured to perform the Decode and Forward cooperative strategy.

Wireless Personal Communications

Transmit Antenna Selection in the Cooperative Communication Based UWB System


Published: Sep 27, 2016 by Wireless Personal Communications
Authors: A. Agrawal and R. S. Kshetrimayum
Subjects: Engineering - Electrical

In this paper, We derived an expression of the average bit error rate (ABER) of the relay assisted two-hop ultra-wideband (UWB) communication system over IEEE 802.15.3a channel model incorporated with the transmit antenna selection at the source and relay nodes. In this two-hop system, each node equipped with the multiple antennas and relay is configured to perform decode and forward protocol.

AEU International Journal of Electronics and Communications

Analysis of UWB communication over IEEE802.15.3a channel by superseding lognorma


Published: Dec 01, 2015 by AEU International Journal of Electronics and Communications
Authors: A. Agrawal and R. S. Kshetrimayum
Subjects: Engineering - Electrical

In this paper, we calculate the bit error rate (BER) of the ultra-wide band (UWB) wireless communication system over IEEE 802.15.3a channel model by superseding the lognormal(LN) shadow fading distribution to the Mixture of Gamma (MG) distributions.

 IETE Journal of Research

Performance Analysis of MIMO systems with Antenna Selection over Generalized k−μ


Published: Sep 16, 2015 by IETE Journal of Research
Authors: B. Kumbhani and R. S. Kshetrimayum
Subjects: Engineering - Electrical

In this paper, we derive closed form expression for outage probability and infinite series expressions for exact and approximate symbol error rate (SER) and capacity of multiple input multiple output systems with transmit antenna selection (TAS) over generalized independent and identically distributed k−μ fading channels.

Electronics Letters

Error Performance of Two-hop Decode and Forward Relaying Systems with Source and


Published: Mar 19, 2015 by Electronics Letters
Authors: B. Kumbhani and R. S. Kshetrimayum
Subjects: Engineering - Electrical

The error performance of two-hop cooperative communication (CC) systems with transmit antenna selection (TAS) at the source and relay over η-μ fading channels is analysed. The probability density function of the received signal-to-noise ratio and the average bit error rate of two-hop CC systems with a source-destination direct link and TAS at both the source and the relay is derived.

Wireless Personal Communications

MGF based approximate SER calculation of SM MIMO systems over generalized η−μ an


Published: Mar 07, 2015 by Wireless Personal Communications
Authors: B. Kumbhani and R. S. Kshetrimayum
Subjects: Engineering - Electrical

Spatial modulation (SM) is a multiple input multiple output (MIMO) wireless communication system that gives better spectral efficiency without costing extra bandwith for the same signal constellation size. In an SM MIMO system with Nt transmitting antennas, spectral efficiency increases by log2(Nt).

IETE Technical Review

Analysis of TAS/MRC based MIMO systems over η − μ Fading Channels


Published: Mar 02, 2015 by IETE Technical Review
Authors: B. Kumbhani and R. S. Kshetrimayum
Subjects: Engineering - Electrical

In this paper, we derive expressions for exact, approximate, and asymptotic symbol error rate (SER) of transmit antenna selection with maximal ratio combining (TAS/MRC) multiple input multiple output (MIMO) systems for several modulation schemes. We have assumed independent and identically distributed η − μ fading channels. We use a moment generating function (MGF) based approach to derive the expressions of SER.

IET Communications

Performance analysis comparison of transmit antenna selection with maximal ratio


Published: Jul 08, 2014 by IET Communications
Authors: M. Kulkarni, L. Choudhary, B. Kumbhani and R. S. Kshetrimayum
Subjects: Engineering - Electrical

In this study, bit error rate (BER) performance of multiple input multiple output (MIMO) systems employing transmit antenna selection with maximal ratio combining (TAS/MRC) and orthogonal space time block codes (OSTBC) is analysed and compared. Analysis has been done for several modulation schemes in equicorrelated Rayleigh fading channels.

Electronics Letters

Outage Probability Analysis of Spatial Modulation Systems with Antenna Selection


Published: Feb 03, 2014 by Electronics Letters
Authors: B. Kumbhani and R. S. Kshetrimayum
Subjects: Engineering - Electrical

The outage probability of spatial modulation (SM) multiple input multiple output (MIMO) systems incorporated with transmit antenna selection (TAS) over Rayleigh fading channels for binary phase shift keying signals is analysed.

IET Journal of Engineering

Approximate SER of cooperative communications over generalized η−μ and k−μ fadin


Published: Jan 14, 2014 by IET Journal of Engineering
Authors: B. Kumbhani, L. N. B. Reddy and R. S. Kshetrimayum
Subjects: Engineering - Electrical

Closed form expressions for approximate symbol error rate are obtained using moment generating function for a two branch cooperative communication system over generalised κ− μ and η− μ i.i.d. fading channels for BPSK and QAM modulation schemes. Selective decode and forward protocol is used at the relay transmitter. At the destination maximal-ratio combining is used. Monte Carlo simulations are performed to verify the analytical results.

IEEE Potentials

An introduction to UWB communication systems


Published: Mar 21, 2009 by IEEE Potentials
Authors: R. S. Kshetrimayum
Subjects: Engineering - Electrical

Ultra-wideband (UWB) wireless communication is a revolutionary technology for transmitting large amounts of digital data over a wide frequency spectrum using short-pulse, low powered radio signals. UWB commonly refers to a signal or system that either has a large relative bandwidth (BW) that exceeds 20% or a large absolute bandwidth of more than 500 MHz. A 14 February 2002 report and order by the federal communications commission (FCC) authorizes the unlicensed use of UWB in 3.1--10.6 GHz.