RESEARCH
Biotelemetry
With the expected rise in bioimplants for preventive medicine, the need to transmit data efficiently and effectively from bioimplants to an external device is of utmost importance. Biological tissue presents a unique medium for a wireless channel with a propagation path unlike a typical free-space environment. This, in conjunction with the low-power requirements of a bioimplant, presents an opportunity for novel systems design. We engage in all steps of the design of biotelemetry devices including modeling of the propagation channel, systems level design, and the fabrication and testing of our designs.
Biosensing
Biosensing, a detection of physiological changes in a living organ system, has proven to be an innovative tool in biomedical fields as they can promptly inform healthcare providers to perform necessary therapeutic interventions to facilitate the patient’s recovery process. Our research focuses on developing biosensors to observe the physiological status of damaged areas in patients. We both design hardware and develop novel signal processing and machine learning algorithms to obtain high-quality sensor measurements.
Bioimaging
We explore new ways to use radiofrequency (RF)-induced thermoacoustic imaging (RF-Acoustics) for imaging applications. This non-invasive bioimaging technique has the potential to become an essential diagnostic tool for various diseases and cancers in the biomedical imaging community as it allows for deep tissue penetration, rich contrast, and high spatial resolution. Our work is both theoretical and experimental, with the aim of modifying the technique to minimize RF power transmitted into the body while still obtaining a high-quality image.
Targeted Drug Delivery and Residency in the Digestive System.
Our research in this area centers around targeted drug delivery to organ systems and temporally stationed residence devices that can systematically deliver drugs or provide relief to the organ system.
Ingestible devices will perform drug delivery to a target location in the GI tract while residency devices can be intentionally retained to periodically deliver drugs in the digestive system. An example of this will be a proton pump inhibitor dispenser to decreases the amount of acid produced in the stomach. This is relevant for patients suffering from gastroesophageal reflux disease (GERD).
Terahertz communication for 6G applications and beyond.
Our research focuses on novel multi-antenna transceiver system design for device-to-device (D2D) applications at THz frequencies. We emphasize a system design that circumvent the use of power hungry DAC/ADCs and complex baseband processing to achieve high data rate transceivers.
[1] S. Sangodoyin and A. Zajić, “Contributions to the Pursuit of a 1.5 Tbps, 2.75 pJ/b Terahertz MIMO D2D Communication System ,” submitted to IEEE Transactions on Wireless Communications.
Radar systems for enhanced detection and tracking.
Our work involves the development of novel radar systems that enhances detection, localization and tracking of targets. We also investigate feature extraction as a means to differentiate between targets, thereby improving detection. Work done in this area varies from remote monitoring of human vital signs to tracking of test subjects in densely congested indoor environment to outdoor environment (with sparse scatterers). We develop super-resolution signal processing and machine learning algorithms to achieve various detection and tracking objective.
[2] S. Sangodoyin , J. Salmi, S. Niranjayan and A. F. Molisch, “Real-time Ultrawideband MIMO Channel Sounding,” in Proc. 6th EuCAP, Prague, Czech Republic, May. 2012, pp. 2303-230
[3] J. Salmi, S. Sangodoyin and A. F. Molisch, “High Resolution Parameter Estimation for Ultra-Wideband MIMO Radar,” IEEE Asilomar Conference on Signal, Systems and Computers, 2010
Nanosensors
Nanosensors measure physical quantities and convert these to signals that can be detected and analyzed. They generate signals by interacting with the target bio-element and process the signal into useful metrics. Our group develops nanosensors to quantify the physical dynamics of cells for prospective disease diagnostics.
