Active Research Areas
Recent and Current Funding Sources
Next Generation Domain-Specific Processor
ASU and its collaborators are developing novel advanced processor for RF systems. This research is funded by DARPA.
Advance Antenna Array Implementations
ASU and its collaborators are developing novel flexible antenna-array approaches and technologies for the next generation of communications systems. This research is funded in part by Airbus.
Communications and Position Estimation
ASU is employing a RF convergence methodology to develop a flexible joint communications and position estimation approach that adapts widely varying propagation conditions. Similarly, the system will address a wide range required positioning accuracy requirements that vary widely depending upon the operating scenario. Developing such flexible high-performance systems provide challenges for both algorithms and computational implementations. This research is funded in part by Airbus.
- A. Herschfelt and D. W. Bliss, “Joint Positioning-Communications System Design: Leveraging Phase-Accurate Time-of-Flight Estimation and Distributed Coherence,” IEEE Asilomar Conference on Signals, Systems, and Computers, Oct., 2018.
ASU is advanced signal processing and algorithms to extract cardiacs signals from small-scale radar systems.
- Y. Rong and D. W. Bliss, “Direct RF Signal Processing For Heart-Rate Monitoring Using UWB Impulse Radar,” IEEE Asilomar Conference on Signals, Systems, and Computers, Oct., 2018.
Y. Rong and D. W. Bliss “Harmonics-Based Multiple Heartbeat Detection at Equal Distance Using UWB Impulse Radar,” IEEE Radar Conference, Oklahoma City, April, 2018.
Radio and Radar Coexistence
As the commercial needs of wireless communications have increased over the last couple decades, the spectral allocations given to radar systems have been viewed with some envy and avarice; however, historically communications systems and radars would cause significant interference to each other. Consequently, they would be spectrally isolated. The BLISS lab is considering the theory, signal processing, and system approaches that fundamentally break this world view. In fact, in certain regimes these systems can actually aid each other’s goals. We are developing new theory and approaches that will enable a dramatic change in radar and radio operations. This research is funded by ONR and by DARPA under the SSPARC program.
- D. Bliss, “Cooperative Radar and Communications Signaling: The Estimation and Information Theory Odd Couple,” IEEE Radar Conference, May 2014.
- B. Paul and D. W. Bliss, “Extending Joint Radar-Communications Bounds for FMCW Radar with Doppler Estimation,” IEEE International Radar Conference, May, 2015.
- A. R. Chiriyath and D. W. Bliss, “Joint Radar-Communications Performance Bounds: Data versus Estimation Information Rates,” IEEE MilCom Conference, Oct., 2015.
- B. Paul and D. W. Bliss “Constant Information Radar for Dynamic Shared Spectrum Access,” IEEE Asilomar Conference on Signals, Systems, and Computers, Nov., 2015.
- A. R. Chiriyath and D. W. Bliss “Effect of Clutter on Joint Radar-Communications System Performance Inner Bounds,” IEEE Asilomar Conference on Signals, Systems, and Computers, Nov., 2015.
- A. R. Chiriyath, B. Paul, G. M. Jacyna, and D. W. Bliss “Inner Bounds on Performance of Radar and Communications Co-Existence,” IEEE Transactions on Signal Processing, Jan., 2016.
- B. Paul, and D. W. Bliss, “Estimation Information Bounds Using the I-MMSE Formula and Gaussian Mixture Models,” IEEE Conference on Information Sciences and Systems (CISS), Princeton, New Jersey, March 2016.
- B. Paul, A. R. Chiriyath, and D. W. Bliss, “Joint Communications and Radar Performance Bounds Under Continuous Waveform Optimization: The Waveform Awakens,” IEEE Radar Conference, Philadelphia, May 2016.
- A. R. Chiriyath, B. Paul, and D. W. Bliss, “Joint Radar-Communications Information Bounds with Clutter: The Phase Noise Menace,” IEEE Radar Conference, Philadelphia, May 2016.
- B. Paul and D. W. Bliss “The Constant Information Radar,” MDPI Special Issue “Radar and Information Theory” of Entropy Journal, Sept., 2016.
- B. Paul, A. R. Chiriyath, and D. W. Bliss “Survey of RF Communications and Sensing Convergence Research,” IEEE Access, Feb., 2017.
- A. R. Chiriyath, B. Paul, and D. W. Bliss “Radar-Communications Convergence: Coexistence, Cooperation, and Co-Design,” IEEE Transactions on Cognitive Communications and Networking, March, 2017.
- A. R. Chiriyath, B. Paul, and D. W. Bliss, “Simultaneous Radar Detection and Communications Performance with Clutter Mitigation,” IEEE Radar Conference, Seattle, May 2017.
- A. Herschfelt, and D. W. Bliss, “Multi-Static Space-Time-Frequency Multiple Access Channel Simulation and Results,” IEEE Radar Conference, Seattle, May 2017.
- B. Paul, C. D. Chapman, A. R. Chiriyath, and D. W. Bliss, “Bridging Mixture Model Estimation and Information Bounds Using I-MMSE,” IEEE Transactions on Signal Processing, Sept., 2017.
Distributed Coherent Systems
By employing disparate radios or RF systems as a single coherent system, communications and energy transmission can be achieved that far exceed anything attainable by a single radio. This technology has the prospect of providing revolutionary improvements in system performance; however, disparate radio do not naturally want to act as a single coherent system. BLISS lab is developing the theory and technology to enable these concepts. We are developing channel modeling and prediction techniques. We are developing experimental approaches for studying channel and hardware phenomenology. We are developing theoretical bounds and signal processing concepts for constrained distributed communications. This research is funded by MIT Lincoln Laboratory for DARPA and by DARPA.
BLISS lab is developing statistical signal processing approaches that enable categorizing and anticipating a number of physiological processes. In particular, we have and are continuing to developed advanced predictions techniques based upon EEG analysis. There are an extremely broad set of opportunities and applications for this research.
Recent Research Projects
Advanced Communications Protocols and Computations
When one considers the current state of wireless communications, it becomes clear that it is both absolutely amazing and something of a mess. Our communications standards are the result of local optimizations over time that led to a confusing set of suboptimal and fragile wireless standards. Starting from a clean sheet of paper, BLISS lab is considering a fluid set of communications standards co-optimizeds with flexible but power-efficient computational implementations that will enable the next revolution of wireless communications. We will enable much higher data rates and much lower data rates with corresponding lower power consumption as the needs of the users vary. This research was funded by Google ATAP.
- G. Bhat, S. Srinivas, V. Chagari, J. Park, T. McGiffen, H. Lee, D. W. Bliss, C. Chakrabarti, U. Y. Ogras, “Fluid wireless protocols: energy-efficient design and implementation,” IEEE/ACM Symposium on Embedded Systems for Real-Time Multimedia, Oct., 2017.
Multiaccess Techniques and Bounds
Multiple access communications techniques that employ multiuser detection for simple channels are relatively well understood; however when the channels are dynamic, both the theoretical limits and viable approaches are less clear. We are developing, the theory and signal processing to address these issues for dynamic environments for which expect some spatial-Doppler correlations. This research is funded by SAZE Technologies.
Advanced Detection Theory
Over the last decade, significant advances in radar theory have been developed thanks to the introduction of multiple-input multiple-output (MIMO) radar. While many of these concepts were understood previously, MIMO radar enables a common framework to investigate these ideas, and, consequently, enables new radar system concepts. In the particularly interesting area of ground moving target indicator (GMTI) radar, the addition of MIMO can avail dramatic system performance improvements. These concepts have applications both to military and commercial systems (such as automotive radars). The BLISS lab is pursuing new detection theory for GMTI MIMO systems based upon the concept of invariants. This research was funded by DEC via AFRL.
Remote Sensing Systems
For multiple applications we investigate advanced remote sensing technologies including radar and other less traditional sensing modalities.
- S. Werth, D. White, and D. W. Bliss, “GRACE Detected Rise of Groundwater in the Sahelian Niger River Basin,” Journal of Geophysical Research, Dec., 2017.
- S. Bryan, A. Clarke, L. Vanderkluysen, C. Groppi, S. Paine, D. W. Bliss, J. Aberle, and P. Mauskopf, “Measuring Water Vapor and Ash in Volcanic Eruptions with a Millimeter-Wave Radar/Imager,” IEEE Transactions on Geoscience and Remote Sensing, Feb., 2017.