(last updated: 2014-07-23)
research
"Research is to see what everybody else has seen, and to think what nobody else has thought." —Albert Szent-Gyorgyi [source]
"Imagination is more important than knowledge. For knowledge is limited, whereas imagination embraces the entire world, stimulating progress, giving birth to evolution. It is, strictly speaking, a real factor in scientific research." —Albert Einstein [source]
my favorite quotes on 'Research'.
Research, in my opinion, is about finding simple, effective, and not-necessarily-optimal solutions to a problem. It involves imagination, the attention to details, and disregarding the inessential; technical skills/concepts are mere tools, one may have to learn, relearn, or even unlearn as means to an end. This page highlights my research activities prior to joining Qualcomm.
Ongoing research (as on 2013-07-01):
Reliable data transmission is arguably the most important consideration
OFDM technology, which is used by the latest cellular network standards (e.g., 3GPP LTE) and wireless data network standards (e.g., WiFi, WiMAX), is effective against frequency-selective fading. However, it is quite fragile
Doubly-selective fading, i.e., the simultaneous occurrence of frequency-selective fading and time-selective fading, becomes severe with
Hence, it is necessary to develop new technologies to mitigate 'doubly-selective fading' in multi-carrier transmissions. The focus of my ongoing research is developing such signal processing techniques anew, without trying to build them upon OFDM. 'Frequency time block modulation' (FTBM), a patent-pending transmission technology, is an outcome of that effort. Related R&D on channel modeling, pulse shaping, channel estimation, peak-power reduction, device prototyping, and field testing are underway.

PhD research:
Similarities in the wireless channel in space, time, and frequency domains indicate that the space-dimension can be exploited for benefits other than
The goal of my PhD research project—titled 'New Signal Processing Techniques for MIMO Physical Layer' and conducted under the supervision of Dr. Chintha Tellambura—was developing signal processing techniques to achieve aforementioned other benefits, quantifying their performance.

MSc research:
My MSc is a course-based one with a research component, and the research project —titled 'Intuitive Reasoning for Epistemic Uncertainty' and conducted under the supervision of Dr. Chulantha Kulasekere— was on intuitive representation and manipulation of epistemic uncertainty

View my Google Scholar profile. view my Google Scholar profile.
Publications:
You have to accept the copyright terms separately for each copyrighted-file download made here. However, if you have been a given a valid passcode it may be used to bypass that requirement.
Passcode:
point/touch to view the abstracts.
Thesis: Patents: Journal publications: Conference publications: