Person:
Jindal, Abhishek

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Name

Abhishek Jindal

Job Title

Faculty

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079-68261654

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Specialization

Reinforcement Learning, Deep Learning for Finance and Cyber Security, Wireless Communication, Cyber-Physical Systems, Information Security

Abstract

Biography

I received the B. Tech. and M. Tech. degrees from the Jaypee Institute of Information Technology (JIIT) Noida, India. Thereafter, I obtained my Ph.D. from the Bharti School of Telecommunication Technology and Management at the Indian Institute of Technology Delhi (IIT Delhi), New Delhi, India. I was a postdoctoral research associate in the Department of Computer Science, University of Texas at Dallas, USA during 2017-2018. For a brief duration, I was a research assistant professor at the Atria Institute of Technology (affiliated to Visvesvaraya Technological University (VTU), Belagavi) in Bengaluru, India. Since June, 2019, I am a faculty at DA-IICT. My tenure details are as follows. Assistant Professor

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2023 - 20242

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Now showing 1 - 2 of 2
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    On Reducing the Outage Probability in VFD-NOMA with Limited CSI at Source
    (IEEE, 01-02-2023) Bhavsar, Twinkle; Jindal, Abhishek; Jindal, Abhishek; Jindal, Abhishek; Jindal, Abhishek; Jindal, Abhishek; Jindal, Abhishek; DA-IICT, Gandhinagar; Bhavsar, Twinkle (201921001)
    We study a virtual full-duplex (VFD) non-orthogonal-multiple-access (NOMA) system in which a source S transmits one message each to users R�1�and R�2�, and two messages to a destination D, in three time slots. In conventional VFD-NOMA, S follows a fixed sequence of transmission (SoT) for the messages of users and destination, leading to a higher outage probability (OP) at R�2�and D, and a higher overall system OP (O-OP). To this end, we propose a novel transmission scheme which significantly decreases the OP at R�2�and D, and the O-OP. We assume all the wireless links undergo Nakagami- m fading, and S only knows the instantaneous channel state information (CSI) of S-R�1�and S-R�2�links. We assume users suffer from imperfect successive interference cancellation (I-SIC) and residual inter-user interference (R-IUI). We derive closed-form results for the OP and show it matches with the simulations. Comparison with half-duplex and full-duplex multiple access schemes is done to demonstrate efficacy of the improved VFD-NOMA.
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    Millimeter-Wave Quasi-Elliptic Filters in Groove Gap Waveguide Technology Using Overmoded Cavity with Spurious Coupling Suppression for Next-Generation SATCOM Applications
    (The EM Academy, 14-08-2024) Kant, Rajni; Ghodgaonkar, Deepak; Jindal, Abhishek; Samanta, Parthasarathi; Modi, Hitesh; Ambati, Praveen Kumar; DA-IICT, Gandhinagar
    This paper addresses the issue of sidelobe imbalance due to spurious coupling in quasi-elliptic filters designed in groove gap waveguide (GGW) technology using TE102�overmoded cavity based resonator to realize the cross coupling in the cascaded quadruplet topology. The filter is designed at 38 GHz with 750 MHz bandwidth (1.97% fractional bandwidth) to demonstrate its potential as a narrow-band, high-power output filter at mm-wave frequencies in next-generation high throughput satellites. The filter is designed for production yield avoiding any complex structures to realize the negative cross coupling and using an all-capacitive iris structure. Systematic studies have been performed to identify and mitigate the sidelobe imbalance issue, and a final design has been proposed with a very low (<1 dB) sidelobe imbalance. The measured results of the realized hardware closely match simulated ones. The proposed design configuration is an ideal filter option for next generation SATCOM applications as it provides benefits of narrowband symmetrical frequency response with low insertion loss, sharp near band rejection, and high-power handling capability along with the benefits of gap waveguide technology in terms of ease of fabrication, low passive intermodulation (PIM) level, and low sensitivity towards surface imperfections and misalignment issues.