Ahmed Mahmood

Research Fellow

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Ahmed is currently a Research Fellow and a Research Lead at the Acoustic Research Laboratory (ARL) at the National University of Singapore (NUS). In June 2014, he completed his Ph.D. from the Department of Electrical and Computer Engineering (ECE) of NUS and has been associated with the ARL ever since. Ahmed works in the general realm of underwater technologies. His current research involves developing robust acoustic communication schemes for the oceanic environment. He has worked on developing statistical models for the underwater acoustic channel and dabbles in subsea signal processing.

Prior to this, Ahmed received his Bachelor of Engineering (BE) and Master of Science (MS) degrees in Electrical Engineering from the National University of Sciences and Technology (NUST), Pakistan, in 2006 and 2009, respectively. After graduating with his Bachelor’s degree, Ahmed joined Motorola Inc. (Pakistan) as an RF Engineer. Later on, with the completion of his Masters, he took up a lecturer position at the COMSATS Institute of Information Technology (CIIT), Islamabad campus, Pakistan.

Ahmed has served as a reviewer for several technical journals, including the IEEE Transactions on Communications, IEEE Communication Letters, IEEE Transactions on Signal Processing, IEEE Letters on Signal Processing, Signal Processing, IET Communications, IEEE Journal of Oceanic Engineering, Ocean Engineering, IEEE Wireless Communications Letters, Ad Hoc Networks and MDPI Sensors. He was the Technical Program Chair for the International Conference on Underwater Networks and Systems 2016 (WUWNet’16) and Outreach Chair for the IEEE Singapore AUV Challenge 2018 (SAUVC'18). He is currently the Chairperson for SAUVC'19 and the Student Poster Chair for IEEE/MTS OCEANS 2020 (Singapore).

When not working, Ahmed is an avid foodie and enjoys spending time with his family. He loves watching movies and is an avid history buff. He is passionate about travelling, loves thinking about going to the gym, gazes at the stars and eventually wants to end up touring outer space.

Email: ahmed (at) arl.nus.edu.sg

Find me on Google Scholar: https://goo.gl/jDs5P4

Find me at my blog: https://goo.gl/TRBVwK

Research Interests

  • Channel Modeling
  • Estimation & Detection Theory
  • Communications in Impulsive Noise
  • Error Control Coding
  • Robust Signal Processing
  • Underwater Acoustic Communications

Publications (ARL)

Journals

[1] A. Mahmood, M. Chitre, and V. Hari, “Locally optimal inspired detection in snapping shrimp noise,” IEEE Journal of Oceanic Engineering, vol. 42, pp. 1049--1062, October 2017. [ DOI | .pdf ]
[2] A. Mahmood and M. Chitre, “Ambient Noise in Warm Shallow Waters: A Communications Perspective,” IEEE Communications Magazine, vol. 55, pp. 198--204, June 2017. [ DOI | .pdf ]
[3] A. Mahmood and M. Chitre, “Generating Random Variates for Stable Sub-Gaussian Processes with Memory,” Signal Processing, vol. 131, pp. 271--279, February 2017. [ DOI | .pdf ]
[4] A. Mahmood and M. Chitre, “Optimal and Near-Optimal Detection in Bursty Impulsive Noise,” IEEE Journal of Oceanic Engineering, vol. 42, pp. 639--653, October 2016. [ DOI | .pdf ]
[5] A. Mahmood, M. Chitre, and M. Armand, “Detecting OFDM Signals in Alpha-Stable Noise,” IEEE Transactions on Communications, vol. 62, no. 10, pp. 3571--3583, 2014. [ .pdf ]
[6] A. Mahmood, M. Chitre, and M. Armand, “On Single-Carrier Communication in Additive White Symmetric Alpha-Stable Noise,” IEEE Transactions on Communications, vol. 62, no. 10, pp. 3584--3599, 2014. [ .pdf ]
[7] A. Mahmood, M. Chitre, and M. Armand, “PSK communication with passband additive symmetric α-stable noise,” IEEE Transactions on Communications, vol. 60, no. 10, pp. 2990--3000, 2012. [ .pdf ]

Invited Papers,Talks & Abstracts

[1] A. Mahmood and M. Chitre, “Uncoded Acoustic Communication in Shallow Waters with Bursty Impulsive Noise,” in Underwater Communications Networking (Ucomms 2016), (Lerici, Italy), September 2016. (Invited). [ .pdf ]
[2] A. Mahmood, V. Hari, and M. Chitre, “Model-Based Signal Detection in Snapping Shrimp Noise,” in Underwater Communications Networking (Ucomms 2016), (Lerici, Italy), September 2016. (Invited). [ .pdf ]
[3] A. Mahmood, M. Chitre, and M. Armand, “Improving PSK performance in snapping shrimp noise with rotated constellations,” in WUWNet'12: 7th ACM International Conference on Underwater Networks & Systems, (Los Angeles, USA), pp. 1--8, November 2012. (Invited). [ .pdf ]
[4] M. Chitre, A. Mahmood, and M. Armand, “Coherent communications in snapping-shrimp dominated ambient noise environments,” in Acoustics 2012 Hong Kong Conference and Exhibition, vol. 131, p. 3277, May 2012. (Invited). [ DOI ]

Conferences

[1] V. Kalaiarasu, V. Hari, A. Mahmood, and M. Chitre, “Predicting underwater acoustic network variability using machine learning techniques,” in OCEANS 2017 MTS/IEEE, (Anchorage, Alaska), September 2017. [ http | .pdf ]
[2] A. Mahmood, M. Chitre, and V. Hari, “Spatial Ambient Noise Inversion Using a Single Hydrophone,” in OCEANS 2017 MTS/IEEE, (Anchorage, Alaska), September 2017. [ http | .pdf ]
[3] A. Mahmood and M. Chitre, “Robust Communication in Bursty Impulsive Noise and Rayleigh Block Fading,” in WUWNet '16, (Shanghai, China), September 2016. [ DOI | .pdf ]
[4] A. Mahmood and M. Chitre, “Temporal Analysis of Stationary Markov α-sub-Gaussian Noise,” in OCEANS 2016 MTS/IEEE, (Monterey, CA, USA), September 2016. [ DOI | .pdf ]
[5] R. Agrawal, M. Chitre, and A. Mahmood, “Design of an Address Assignment and Resolution Protocol for Underwater Networks,” in OCEANS 2016 MTS/IEEE, (Shanghai, China), April 2016. [ DOI | .pdf ]
[6] A. Mahmood and M. Chitre, “Modeling Colored Impulsive Noise by Markov Chains and Alpha-Stable Processes,” in OCEANS 2015 MTS/IEEE, (Genoa, Italy), May 2015. [ DOI | .pdf ]
[7] A. Mahmood, M. Chitre, and M. Armand, “Maximum-likelihood detection performance of uncoded OFDM in impulsive noise,” in Global Telecommunications Conference (GLOBECOM 2013), 2013 IEEE, (Atlanta, GA, USA), December 2013. [ DOI | .pdf ]
[8] A. Mahmood, M. Chitre, and M. Armand, “Baseband characterization of additive white symmetric α-stable noise,” in Proceedings of IEEE GLOBECOM 2012, (Anaheim, CA, USA), pp. 3703--3708, December 2012. [ DOI | .pdf ]

PhD Thesis

[1] A. Mahmood, Digital Communications in Additive White Symmetric Alpha-Stable Noise. PhD thesis, National University of Singapore, 2014. [ .pdf ]

Publications (non-ARL)

MS Thesis

"Simulation and Implementation of Block Turbo Codes", MS Thesis, College of Electrical and Mechanical Engineering, National University of Sciences and Technology, 2009.

 

ARL