Sensor Systems Laboratory

Inventing new technology for sensing, robotics, wireless power, and medical devices

Joshua R. Smith, Ph. D.
Milton and Delia Zeutschel Professor
Allen School of Computer Science and Engineering, University of Washington
Department of Electrical and Computer Engineering, University of Washington

Recent Publications

"Simplifying Backscatter Deployment: Full-Duplex LoRa Backscatter", Mohamad Katanbaf, Anthoney Weinanad, Vamsi Talla, NSDI 2021


Receiver Selectivity Limits on Bistatic Backscatter Range, Mohamad Katanbaf, Ali saffari, Joshua R. Smith, 2020 IEEE International Conference on RFID, 2020


Contact-less Manipulation of Millimeter-scale Objects via Ultrasonic Levitation, Jared Nakahara, Boling Yang, Joshua R. Smith, 8th IEEE RAS/EMBS International Conference for Biomedical Robotics and Biomechatronics (BioRob), 2020


Classifying WLAN Packets from the RF Envelope: Towards More Efficient Wireless Netowrk Performance, Zerina Kapetanovic*, Gregory Moore*, Shanti Garman, Joshua. R. Smith, ACM EMDL 2020 (*Primary Co-authors)


Relacks: Reliable Backscatter Communication in indoor environmens, Mohamad Katanbaf, Vivek Jain, Joshua R. Smith, Proceedings of the ACM on Interactive, Mobile, Wearable, and Ubiquitous Technologies, 2020 [pdf]


Glaze: Overalying Occupied Spectrum with Downlink IoT Transmissions, Zerina Kapetanovic, Ali Saffari, Ranveer Chandra, Joshua. R. Smith, Proceedings of the ACM on Interactive, Mobile, Wearable, and Ubiquitous Technologies, 2020 [Video]


Improved Proximity, Contact, and Force Sensing via Optimization of Elastomer-Air Interface Geometry, Patrick E. Lancaster, Joshua R. Smith, Siddhartha S. Srinivasa, IEEE International Conference on Robotics and Automation, May 2019.

Battery_Free Video Streaming Camera System, Ali Saffari, Mehrdad Hessar, Saman Naderiparizi, Joshua R. Smith, IEEE International Conference on RFID (RFID), April, 2019.

NeuralCLIP: A Modular FPGA-Based Neural Interface for Closed-Loop Operation, Vaishnavi Ranganathan, Jared Nakahara, Soshi Samejima, Nicholas Tolley, Abed Khorasani, Chet T. Moritz, Joshua R. Smith, 9th International IEEE EMBS Conference on Neural Engineering, March 20, 2019.

RF Bandaid: A Fully-Analog and Passive Wireless Interface for Wearable Sensors, Vaishnavi Ranganathan, Sidhant Gupta, Jonathan Lester, Joshua R. Smith, Desney Tan, Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies, June 2018.

Wireless Quantization Index Modulation: Enabling Communication Through Existing Signals, Zerina Kapetanovic, Vamsi Talla, Aaron Parks , Jing Qian, Joshua Smith, IEEE RFID, 2018/4/10. ***Best Paper Nominee***

RF-powered, Backscatter-based Cameras, Saman Naderiparizi, Zerina Kapetanovic, Joshua R. Smith, IEEE 11th European Conference on Antennas and Propagation (EUCAP), pp. 346-349, 2017.

Fast Downstream to Many (Computational) RFIDs, Henko Aantjes, Amjad Y Majid, Przemyslaw Pawelczak, Jethro Tan, Aaron Parks, Joshua R Smith, Proc. IEEE INFOCOM 2017, June 14, 2017.

Pre-touch Sensing for Sequential Manipulation, Boling Yang, Patrick Lancaster, Joshua R. Smith, Proceedings of ICRA 2017, May 2017.

Finding Common Ground: A Survey of Capacitive Sensing in Human-Computer Interaction, Tobias Grosse-Puppendahl, Christian Holz, Gabe Cohn, Raphael Wimmer, Oskar Bechtold, Steve Hodges, Matthew S Reynolds, Joshua R Smith, Proceedings of the 2017 ACM SIGCHI Conference (CHI 2017), May 6, 2017.

FM Backscatter: Enabling Connected Cities and Smart Fabrics, Anran Wang, Vikram Iyer, Vamsi Talla, Joshua R. Smith, Shyamnath Gollakota, 14th USENIX Symposium on Networked Systems Design and Implementation (NSDI 17), March 27, 2017.

Passive Wi-Fi: Bringing Low Power to Wi-Fi Transmissions, Bryce Kellogg, Vamsi Talla, Shyamnath Gollakota, Joshua R. Smith, Usenix Symposium on Networked Systems Design and Implementation (NSDI), 2016. ***Best Paper***

2D and 3D Millimeter-Wave Synthetic Aperture Radar Imaging on a PR2 Platform, Claire M Watts, Patrick Lancaster, Andreas Pedross-Engel, Joshua R Smith, Matthew S Reynolds, IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS 2016), October, 2016.

Inter-Technology Backscatter: Towards Internet Connectivity for Implanted Devices, Vikram Iyer, Vamsi Talla, Bryce Kellogg, Shyamnath Gollakota, Joshua R Smith, Proceedings of the 2016 ACM SIGCOMM Conference (SIGCOMM 2016), August 2016. ***Best Paper***

Battery-Free Connected Machine Vision with WISPCam, Saman Naderiparizi, Zerina Kapetanovic, Joshua R. Smith, GetMobile Magazine, 2016.

WISPCam: An RF-Powered Smart Camera for Machine Vision Applications, Saman Naderiparizi, Zerina Kapetanovic, Joshua R. Smith, ASPLOS HLPC Workshop, April 2016.

Design and Analysis of Rectifying and Regulating Rectifier with PWM and PFM Modes, Vamsi Talla, Joshua R. Smith, , May 2016.

A High-Voltage Compliant Neural Stimulator With HF Wireless Power and UHF Backscatter Communication, Vaishnavi Ranganathan, Brody Mahoney, Eric Pepin, Michael Sunshine, Chet T. Moritz, Jacques C. Rudell, Joshua R. Smith, IEEE WPTC, 2016.

Analysis of a Near Field Communication Wireless Power System, Yi Zhao, Brody Mahoney, Joshua R. Smith, IEEE WPTC, 2016.

Dual Band Wireless Power and Bi-Directional Data Link for Implanted Devices in 65 nm CMOS, Vamsi Talla, Vaishnavi Ranganathan, Brody Mahoney, Joshua R. Smith, , May 2016.

A high-voltage compliant neural stimulator with HF wireless power and UHF backscatter communication, Vaishnavi Ranganathan, Brody Mahoney, Eric Pepin, Michael D Sunshine, Chet T Moritz, Jacques C Rudell, Joshua R Smith, 2016 IEEE Wireless Power Transfer Conference (WPTC 2016), May 2016.

BLISP: Enhancing backscatter radio with active radio for computational RFIDs, Ivar in't Veen, Qingzhi Liu, Przemyslaw Pawelczak, Aaron Parks, Joshua R Smith, 2016 IEEE International Conference on RFID (IEEE RFID 2016), May 2016.

uMonitor: In-situ Energy Monitoring with Microwatt power consumption, Saman Naderiparizi, Aaron N. Parks, Farshid Salemi, Joshua R. Smith, IEEE RFID, May 2016.

Wisent: Robust downstream communication and storage for computational RFIDs, Jethro Tan, Przemysław Pawełczak, Aaron Parks, Joshua R Smith, IEEE INFOCOMM, The 35th Annual IEEE International Conference on Computer Communications, April 2016.

Large Area Wireless Power via a Planar Array of Coupled Resonators, Xingyi Shi, Joshua R. Smith, IEEE IWAT, Feb 2016.

Transmissive Optical Pretouch Sensing for Robotic Grasping, Di Guo, Patrick Lancaster, Liang-Ting Jiang, Fuchun Sun, Joshua R. Smith, Intelligent Robots and Systems (IROS), 2015 IEEE/RSJ International Conference on, Hamburg, pp. 5891-5897, 2015.

Self-Localizing Battery-Free Cameras, Saman Naderiparizi, Yi Zhao, James Youngquist, Alanson P. Sample, Joshua R. Smith, Proceedings of the 2015 ACM International Joint Conference on Pervasive and Ubiquitous Computing. ACM, September 2015.

NFC-WISP: an open source software defined near field RFID sensing platform, Yi Zhao, Joshua R. Smith, Alanson Sample, Ubicomp, 2015.

WISPCam: A Battery-Free RFID Camera, Saman Naderiparizi, Aaron N. Parks, Zerina Kapetanovic, Benjamin Ransford, Joshua R. Smith, IEEE RFID, April 15-17 2015.

Physical human interactive guidance: Identifying grasping principles from human-planned grasps, R Balasubramanian, L Xu, PD Brook, JR Smith, Y Matsuoka, The Human Hand as an Inspiration for Robot Hand Development, pp 477-500, Springer, 2014.