Department of Electronics and Electrical Engineering
Indian Institute of Technology Guwahati
Guwahati-781039, India

EEE Department, IIT Guwahati

Dr. Ribhu

Ribhu Chopra
Homepage

PhD (IIT Roorkee, India)
Designation: Assistant Professor

Ribhu joined the institute in April 2017.

Contact Details
Office Address : Room No. 113, New Extension Block, EEE Department, IIT Guwahati, Guwahati-781039, India.
Phone: +91 361 2583475 (Office)
Fax: +91-361-2582542
Email: ribhufec[AT*]iitg.ac.in

Research Areas
  • Signal Processing for Wireless Communication
  • MIMO Systems
  • Adaptive and Statistical Signal Processing

Selected Publications

Journal Publications

   2021

  • R. Chopra and C. R. Murthy, Data Aided MSE-Optimal Time Varying Channel Tracking in Massive MIMO Systems, Accepted, IEEE Transactions on Signal Processing, Jun. 2021

  • T. V. Chien, A. K. Papazafeiropoulos, Lam-Thanh Tu, R. Chopra, S. Chatzinotas, B. E. Ottersten, “Outage Probability Analysis of IRS-Assisted Systems Under Spatially Correlated Channels”, IEEE Wireless Communications Letters, Accepted May. 2021.

  • R. Chopra, C. R. Murthy, and A. Papazafeiropoulos, “Uplink Performance Analysis of Cell-Free mMIMO Systems under Channel Aging”, IEEE Communications Letters, Accepted Apr. 2021.

  • A. Dave*, S. Kuhar*, R. Chopra, “Deep Learning based Semi-blind Tracking for Aging Wireless Communication Channels”, Wireless Personal Communications, Accepted Feb. 2021.

  • Vishwamittar, P. Batra, and R. Chopra, “Stochastic resonance in two coupled fractional oscillators with potential and coupling parameters subjected to quadratic asymmetric dichotomous noise”, in Physica A: Statistical Mechanics and its Applications, Volume 561, 2021.

   2020

  • S. Ghosh and R. Chopra, “Downlink Pilots for Hybrid Massive MIMO Under Reciprocity Imperfections,” in IEEE Communications Letters, vol. 24, no. 10, pp. 2334-2338, Oct. 2020.

  • R. Chopra, C. R. Murthy, H. A. Suraweera, and E. G. Larsson, “Blind Channel Estimation for Downlink Massive MIMO Systems with Imperfect Channel Reciprocity”, IEEE Transactions on Signal Processing, vol. 68, no. 1, pp. 3132-3145, 2020. (accepted Apr. 2020)

  • A. Chowdhury, R. Chopra, “Frame Structures for Massive MIMO Communications Under Channel Aging”, Wireless Personal Communications, 111, 2659–2669 (2020).

   2019

  • R. Chopra, C. R. Murthy and R. Annavajjala, “Physical Layer Security in Wireless Sensor Networks Using Distributed Co-Phasing,” in IEEE Transactions on Information Forensics and Security, vol. 14, no. 10, pp. 2662-2675, Oct. 2019.

  • S. Ghosh and R. Chopra, “Training for Massive MIMO Systems with Non-Identically Aging User Channels”, in Physical Communication (Elsevier), vol 35, August 2019.

  • R. Chopra, C. R. Murthy, H. A. Suraweera, E. G. Larsson, “Analysis of Nonorthogonal Training in Massive MIMO Under Channel Aging With SIC Receivers,” in IEEE Signal Processing Letters, vol. 26, no. 2, pp. 282-286, Feb. 2019.

   2018

  • R. Chopra, C. R. Murthy and G. Rangarajan, “Statistical Tests for Detecting Granger Causality,” in IEEE Transactions on Signal Processing, vol. 66, no. 22, pp. 5803-5816, 15 Nov.15, 2018.

  • R. Chopra, C. R. Murthy, H. A. Suraweera and E. G. Larsson, “Performance Analysis of FDD Massive MIMO Systems Under Channel Aging,” in IEEE Transactions on Wireless Communications, vol. 17, no. 2, pp. 1094-1108, Feb. 2018.

   2017

  • R. Chopra, R. Annavajjala and C. R. Murthy, “Distributed Cophasing With Autonomous Constellation Selection,” in IEEE Transactions on Signal Processing, vol. 65, no. 21, pp. 5798-5811, Nov., 2017.

  • Ribhu Chopra, Debashis Ghosh, D.K. Mehra, “Spectrum sensing for OFDM signals using pilot induced cyclostationarity in the presence of cyclic frequency offset”,Physical Communication, Volume 24, September 2017.

  • Ribhu Chopra, Chandra R. Murthy, and Ramesh Annavajjala, “Multi-Stream distributed Co-Phasing” in IEEE Transactions on Signal Processing, vol. 65, no.4, pp. 1042-1057, Feb.15, 2017.

   2016

  • Ribhu Chopra, Chandra R.Murthy, and Himal A. Suraweera, “On the Throughput of LargeMIMO Beamforming Systems with Channel Aging”, in IEEE Signal Processing Letters, vol. 23, no. 11, pp. 1523-1527, Nov. 2016.

  • Ribhu Chopra, Debashis Ghosh, and D.K. Mehra, “Performance evaluation of FRESH filter based spectrum sensing for cyclostationary signals”, Physical Communication(Elsevier), Volume 20, September 2016, Pages 17-32, ISSN 1874-4907.

  • Ribhu Chopra, Debashis Ghosh and D. K.Mehra, “FRESH Filter-Based Spectrum Sensing in the Presence of Cyclic Frequency Offset” in IEEE Wireless Communications Letters, vol. 5, no. 2, pp. 124-127, April 2016.

   2014

  • Ribhu Chopra, Debashis Ghosh, and D. K. Mehra, “Spectrum Sensing for Cognitive Radios Based on Space-Time FRESH Filtering” IEEE Transactions on Wireless Communications, vol.13, no.7, pp.3903-3913, July 2014.

  • Khunteta, A., Ghosh D and Ribhu, “A Fuzzy Approach to Image Exposure Level Estimation and Contrast Enhancement in Dark Images via Exposure Level Optimization” International Journal of Latest Trends in Engineering, Science and Technology, Volume 1, Issue 5, April 2014.

Conference Publications

  • Anubhab Chowdhury, Ribhu Chopra, Chandra R Murthy, and Himal A Suraweera in “On the Achievable Rates of Full-Duplex Massive MIMO Systems Under Channel Aging”, in 2019 IEEE 20th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) (IEEE SPAWC 2019).

  • R. Chopra, “Uplink training for massive MIMO systems under channel aging,” in 2018 International Conference on Signal Processing and Communications (SPCOM) (SPCOM 2018), (Indian Institute of Science, Bangalore, India), July 2018.

  • Ribhu Chopra, C. R. Murthy, and R. Annavajjala, “Multi-Stream distributed Co-Phasing: design and analysis,” 2016 IEEE 17th International Workshop on Signal Processing Advances in Wireless Communications (IEEE SPAWC 2016), Edinburgh, United Kingdom, July 2016.

  • Ribhu; D. Ghosh ; D. K. Mehra, D.K., “Cooperative Spectrum Sensing for Cognitive Radios Using Jointly Adaptive FRESH Filters,” National Conference on Communications 2015 (NCC-2015) , pp.1,6, Mumbai, India, Feb 2015.

  • Ribhu; D. Ghosh ; D. K. Mehra, “Cyclostationary spectrum sensing for OFDM signals in the presence of cyclic frequency offset,” 2014 International Conference on Signal Processing and Communications (SPCOM) , vol., no., pp.1,6, 22-25, Banglore, India, July 2014.

  • Ghosh, D.; Ribhu; Shivaprasad, A.P., “Parameter tuning for multi-prototype possibilistic classifier with reject options,” 2013 IEEE International Conference on Fuzzy Systems (FUZZ) , vol., no., pp.1,6, 7-10 July 2013.

  • Khunteta, A.; Ghosh, D.; Ribhu, “Fuzzy rule-based image exposure level estimation and adaptive gamma correction for contrast enhancement in dark images,” 2012 IEEE 11th International Conference on Signal Processing (ICSP) , vol.1, no., pp.667,672, 21-25 Oct. 2012.

  • Ribhu, R.; Ghosh, D., “A sparse representation based approach for steganography,” 2012 IEEE 11th International Conference on Signal Processing (ICSP) , vol.3, no., pp.1678,1681, 21-25 Oct. 2012.

  • Ribhu, R.; Ghosh, D., “Dictionary design for sparse signal representations using K-SVD with sparse Bayesian learning, 2012 IEEE 11th International Conference on Signal Processing (ICSP) , vol.1, no., pp.21,25, 21-25 Oct. 2012.