Ketan Rajawat
Assistant Professor
Associate Editor, IEEE Communication Letters
P. K. Kelkar Young Faculty Research Fellow
ACES 305C
Department of Electrical Engineering
Indian Institute of Technology Kanpur
Kanpur UP 208016 INDIA
email: ketan@iitk.ac.in
Tel: +91-512-259-7337,
+91-8601966020
Prospective students/staff:
- Students interested in working with me
should email me
their CVs (with a list of relevant courses taken) and schedule
a
meeting.
- No summer/winter internship positions are available for
non-IITK students.
- Research: we focus on the applications of signal processing
to communications. See the SPiN
lab research page for details. Specific problems of
interest include:
- Online learning with dynamic convex optimization [NCC 2018 tutorial]
- Localization of wireless sensor networks, design of
distributed algorithms
- Signal processing assisted network monitoring
- Transceiver optimization, precoder design, beamforming,
interference alignment
- Signal processing for smart grid communications, load
scheduling, state estimation
- Stochastic resource allocation and its applications in
wireless networks
- Spectrum sensing via sparsity and low rank
- Network coding
- Education
- Publications
[Journal]
- A. S. Bedi, P. V. Aditya Prasad, M. W. Ahmad, S. Shinde, K. Rajawat, and
S. Anand, "Online Algorithms for Storage Utilization under Real-Time
Pricing in Smart Grid," International Journal of Electrical Power and Energy Systems (Elsevier), vol. 101, pp. 50-59, Oct. 2018.
- J. G. Sreenath, S. Chakrabarti, and K. Rajawat, "Hierarchical Parallel Dynamic Estimator of States for Interconnected Power System," IET Generation, Transmission, and Distribution, 2018.
- A. S. Bedi and K.
Rajawat, "Asynchronous incremental stochastic dual descent
algorithm for network resource allocation," IEEE Transactions on Signal
Processing, 2018. [arxiv]
- A. S. Bedi and K.
Rajawat, "Network
resource allocation via stochastic subgradient descent: convergence rate,"
IEEE
Transactions on Communications, 2018.
- Meher Preetam K., S. Mishra, K. Rajawat, and L.
Behera, "A
hybrid adaptive framework for coordinated control of distributed
generators in cyber-physical energy systems," IET Cyber-Physical Systems:
Theory and Applications, vol. 3, no. 1, pp. 54-62, Mar. 2018.
- A. S. Bedi, P. Sarma, and K. Rajawat, "Tracking
moving agents via inexact online gradient descent algorithm,"
IEEE
Journal of Selected Topics in Signal Processing - Special issue on
Machine Learning for Cognition in Radio Communications and Radar,
vol. 12, no. 1, pp. 202-207, Feb. 2018.
- J. Akhtar and K.
Rajawat, "Distributed
sequential estimation in wireless sensor networks,"
IEEE
Transactions on Wireless Communications, vol. 17, no. 1,
pp. 86-100, Jan. 2018.
- R. Tripathi, B. Mohan, and K. Rajawat, "Adaptive
low rank matrix completion," IEEE
Transactions on Signal Processing, vol. 65, no. 14, pp.
3603-3616, July 2017.
[Videos]
- K. Rajawat
and S. Kumar, "Stochastic
multidimensional scaling," IEEE
Transactions on Signal and Information Processing over Networks -
Special Issue on Distributed Information Processing in Social
Networks, vol. 3, no. 2, pp. 360-375, June 2017. [TrackingVideo][MovieLensVideo][Code]
- S. Kumar, R. Jain, and K. Rajawat, "Asynchronous
optimization over heterogeneous networks via consensus ADMM,"
IEEE
Transactions on Signal
and Information Processing over Networks, vol. 3, no. 1,
pp. 114-129, Mar. 2017.
- S.
S. Kalamkar, J. Pradha J, A. Banerjee, and K. Rajawat,
"Resource
allocation and fairness in wireless powered cooperative cognitive radio
networks," IEEE
Transactions on
Communications, vol. 64, no. 8, pp. 3246-61, Aug. 2016.
- A. S. Bedi, J. Akhtar, K. Rajawat, and A.
K.
Jagannatham,
"BER-optimized
precoders for OFDM systems with insufficient cyclic prefix," IEEE
Communication Letters, vol. 20, no. 2, pp 280-283, Feb.
2016.
- S. Kumar, R. Kumar, and K. Rajawat,
"Cooperative
localization of mobile networks via velocity-assisted multidimensional
scaling," IEEE
Transactions on Signal Processing, vol. 64, no. 7, pp.
1744-58, Feb. 2016.
- G. Kapoor and K.
Rajawat, "Outlier-aware
cooperative spectrum sensing in cognitive radio networks," Physical Communication (Elsevier),
vol. 17, pp. 118-127, Dec. 2015.
- P. Katiyar and K.
Rajawat, "Channel-aware
medium access control in multichannel cognitive radio networks,"
IEEE
Communication Letters, vol. 19, no. 10, pp.
1710-13, 2015.
- P. A. Forero, K.
Rajawat, and G. B. Giannakis, “Prediction
of
partially
observed dynamical processes over networks via dictionary learning,”
IEEE
Transactions on Signal Processing, vol. 62, no. 13, pp.
3305-3320, July 2014.
- K. Rajawat,
E. Dall'Anese, and G. B. Giannakis, “Dynamic
network delay
cartography,” IEEE
Transactions on Information Theory, vol. 60, no. 5, pp.
2910-2920, May 2014.
- G. Mateos and K.
Rajawat, ''Dynamic
network cartography: advances in network health monitoring,''
IEEE Signal
Processing Magazine
- Special issue on `Adaptation and learning over complex networks,'
vol. 30, no. 3, pp. 129-143, May 2013. [Errata]
- K. Rajawat,
A. Cano, and G. B. Giannakis, “Network-compressive
coding for wireless
sensors with correlated data,” IEEE
Transactions on Wireless Communications, vol. 11, no. 12,
pp. 4264-4274, Dec. 2012.
- K.
Rajawat
and G. B. Giannakis, “Joint
scheduling and network coding for multicast
in delay-constrained wireless networks,” IEEE Transactions on Signal
Processing, vol. 59, no. 12, pp. 6186-6196, Dec. 2011.
- K.
Rajawat,
N. Gatsis,
S.-J. Kim, and G. B. Giannakis, “Cross-layer
design of coded
multicast for wireless random access networks,” IEEE Journal on Selected
Areas in Communications, vol. 29, no. 10, pp.
1970-1980, Dec. 2011.
- K.
Rajawat,
N. Gatsis,
and G. B. Giannakis, “Cross-layer
designs in coded wireless fading
networks with multicast,” IEEE/ACM Transactions
on Networking,
vol. 19, no. 5, pp. 1276-1289, Oct. 2011. [most
accessed
article in Nov. 2011.]
- K.
Rajawat
and A. K. Chaturvedi, “Near
optimal training sequences for low complexity symbol timing estimation
in MIMO systems,” IEEE
Transactions on Communications,
vol. 58, no. 1, pp. 281-288, Jan 2010.
- K.
Rajawat
and A. K. Chaturvedi, “A
low
complexity symbol timing estimator for MIMO systems using two samples
per symbol,” IEEE
Communications Letters, vol. 10, no. 7, pp. 525-527, July
2006.
[Book chapter]
- S.-J. Kim, E. Dall'Anese, J. A. Bazerque, K. Rajawat, and G.
B. Giannakis, "Advances
in spectrum sensing and cross-layer design for cognitive radio networks,"
in Academic Press
Library in Signal Processing: Communications and Radar
Signal Processing,
vol. 2,
N. D. Sidiropoulos, F. Gini, R. Chellappa, and S. Theodoridis,
Eds., Elsevier, 2013.
[A* conferences (> 9 pages)]
- A. S. Bedi, K. Rajawat, and M. Coupechoux, "An online
approach to D2D trajectory utility maximization problem," in Proc. of the IEEE Intl. Conf. on
Computer Communications (INFOCOM), Honolulu, HI, USA, Apr.
2018.
[Other conferences (< 7 pages)]
- A. S. Bedi, P. Sarma, and K. Rajawat, "Adversarial
Multi-Agent Target Tracking with Inexact Online Gradient Descent," in Proc.
of the IEEE International Conference on Acoustics, Speech and
Signal
Processing (ICASSP), Calgary, Canada, Apr. 2018.
- A. S. Bedi and K. Rajawat, "Wireless network
optimization via stochastic sub-gradient descent: rate analysis," in Proc. of the IEEE Wireless
Communications and Networking Conf. (WCNC), Barcelona,
Spain, Apr. 2018.
- C. Kumar and K. Rajawat, "Dictionary learning-based
fingerprinting for indoor localization," in Proc. of the National Conference
on Communications (NCC), Hyderabad, India, Feb. 2018.
- A. S. Bedi, A. Koppel, and K. Rajawat, "Beyond consensus and synchrony
in decentralized online optimization using saddle point method,"
in Proc. of the Asilomar Conf. on Signals, Systems, and Computers, Pacific
Grove, CA, Nov. 2017. [Asilomar
Student Paper Contest Finalist].
- A. Meghwani, J. G. Sreenath, K. Rajawat, S.
Chakrabarti, S. C.
Srivastava, “A Recursive State Estimation Approach to Mitigate False
Data Injection Attacks in Power Systems,” in IEEE PES General Meeting,
Chicago, IL, USA, July, 2017.
- A. S. Bedi and K. Rajawat, "Asynchronous
resource allocation in distributed heterogeneous networks,"
in Proc. of the IEEE International Conference on Communications (ICC),
Paris, France, May 2017.
- A. S. Bedi and K. Rajawat, "Optimal
utilization of storage systems under real-time pricing," in Proc. of the IEEE ICC Workshop
on Integrating Communications, Control, and Computing Technologies for
Smart Grid, Paris, France, May 2017.
- S. Kumar and K. Rajawat, "Distributed
asynchronous localization over WSNs via non-convex consensus ADMM,"
in Proc. of the
National Conference on Communications (NCC), Chennai, India,
Mar. 2017.
- S. Kumar and K. Rajawat, "Distributed
interference alignment for MIMO cellular network via consensus ADMM,"
in Proc. of the IEEE
GlobalSIP,
Washington, DC USA, Dec. 2016
- J. Akhtar, A. S. Bedi, K. Rajawat, and A. K.
Jagannatham,
"BER-optimized
robust precoder design for MIMO-OFDM systems with
Insufficient CP" in Proc. of IEEE
Globecom, Washington, DC USA, Dec. 2016.
- A. S. Bedi and K. Rajawat, "Online
load scheduling under price
and demand uncertainty in smart grid," in Proc. of the Intl. Conf. on
Signal Processing and Communications (SPCOM), Bangalore,
India. June
2016.
- R. Singh and K. Rajawat, "Online
precoder design for parameter tracking in wireless sensor networks,"
in Proc. of
the IEEE Annual Intl.
Symp. on
Personal, Indoor, and Mobile Radio Commun. (PIMRC), Hong
Kong, Aug. 2015.
- S. Kumar and K. Rajawat, "Velocity
assisted multidimensional scaling," in Proc. of the IEEE Intl. Workshop on Signal
Processing Advances in Wireless Communications (SPAWC),
Stockholm, Sweden, June 2015.
- G. Kapoor, and K. Rajawat, "Outlier-aware spectrum sensing in
cognitive radio networks," in Proc. of the Intl. Conf. on Signal Processing
and Communication Systems (ICSPCS), Gold Coast,
Australia, Dec., 2014.
- A. Mishra, A. Pal, K. Rajawat, and A. K. Jagannatham, "Sparse
Bayesian learning-based data-aided channel estimation for STTC MIMO
systems", in Proc. of the Australasian Telecommunication
Networks and Applications Conference (ATNAC), Melbourne,
Australia, Nov. 2014.
- A. Jalan, K. Rajawat, R. M. Hegde, "New
encoding schemes for efficient multilingual text messaging,''
in Proc. of the
National Conference on Communications (NCC), Kanpur, India, Mar.
2014.
- K. Rajawat,
E. Dall’Anese, and G. B. Giannakis, “Dynamic
network kriging,” in Proc. of IEEE Statistical Signal
Processing Workshop, Ann Arbor, MI, Aug. 2012.
- P. A. Forero, K.
Rajawat, and G. B. Giannakis, “Semi-supervised
dictionary learning for network-wide link load prediction,”
in Proc. of
Cognitive
Information Processing Workshop, Baiona, Spain, May 2012.
- K. Rajawat,
E. Dall’Anese, and G. B. Giannakis, “Joint
rate and power control for
coded cognitive radio networks,” in Proc. of 45th Asilomar Conference on
Signals, Systems, and Computers, Pacific Grove, CA, pp.
259–264, Nov. 2011.
- K.
Rajawat,
N. Gatsis, S.-J. Kim,
and G. B. Giannakis, “Cross-layer
design of coded multicast for
wireless random access networks,” in Proc. of Conf. on Information
Sciences and Systems (CISS), Baltimore, MD, Mar. 2011.
- K.
Rajawat,
N. Gatsis, and G. B. Giannakis, “Cross-layer
design of
multicast in fading: network coding and asynchronous subgradients,”
in Proc. of
3rd IEEE Wireless Network Coding Workshop (SECON
Workshops), Boston, MA, June 2010.
- K.
Rajawat
and G. B. Giannakis, “Non-random
wireless network coding,”
in Proc. of
2nd IEEE Wireless Network Coding Workshop (SECON
Workshops), Rome, Italy, June 2009.
- K.
Rajawat,
T. Wang, and G. B. Giannakis, “An
algebraic polyphase approach to wireless network coding,”
in Proc. of IEEE International Conference on Acoustics, Speech
and
Signal
Processing (ICASSP),
Taipei, Taiwan, Apr. 2009.
- K.
Rajawat
and A. Banerjee, “Selection
relaying at low signal to noise ratios,” Wireless
Personal Multimedia Communications (WPMC), Jaipur, Dec,
2007. [arxiv].
- K.
Rajawat
and A. K. Chaturvedi, “Non-data
aided symbol timing estimation in MIMO systems,” in Proc. of IEEE International Conference on
Communications (ICC), Glasgow, Scotland, April 2007.
- K. Rajawat and A. K. Chaturvedi, "Non-data aided symbol
timing estimation in multiple antenna systems," in Proc. of National Conference on
Communications (NCC), Kanpur, India, Mar. 2007.
[Patents]
- IPA No-1857/DEL/2006: A low complexity symbol timing
estimator for MIMO systems using two samples per symbol, Patent Grant
No. 272223