Conference and Workshops:

[1] Carlos-Perez Penichet, Claro Noda Ambuj Varshney, Thiemo Voigt Battery-free 802.15.4 Receiver , The 17th International Conference on Information Processing in Sensor Networks (ACM/IEEE IPSN 2018), 2018

[2] Ambuj Varshney, Andreas Soleiman, Luca Mottola, Thiemo Voigt Battery-free Visible Light Sensing , The Fourth ACM Workshop on Visible Light Communication Systems (ACM VLCS 2017) in conjunction with ACM MOBICOM, October 2017, Snowbird, Utah, USA. (Best paper award)

[3]Ambuj Varshney, Carlos Perez Penichet, Christian Rohner, Thiemo Voigt Towards wide-area backscatter networks , The Fourth ACM Workshop on Hot Topics in Wireless (ACM HOTWIRELESS 2017) in conjunction with ACM MOBICOM, October 2017, Snowbird, Utah, USA.

[4] Ambuj Varshney, Oliver Harms, CP Penichet, Christian Rohner, Frederik Hermans, Thiemo Voigt LoRea: A Backscatter architecture that achieves a long communication range , The 15th ACM Conference on Embedded Networked Sensing Systems (ACM SENSYS 2017). 2017, Delft, Netherlands. Acceptance rate 17.2% (26/151)

[5] Kasun Hewage, Ambuj Varshney, Abdalah Hilamia, Thiemo Voigt modBulb: A Modular Light Bulb for Visible Light Communication , The Third ACM Workshop on Visible Light Communication Systems (ACM VLCS 2016) in conjunction with ACM MobiCom, October 2016, New York, USA.

[6] Carlos Perez Penichet, Frederik Hermans, Ambuj Varshney, Thiemo Voigt Augmenting IoT Networks with Backscatter-Enabled Passive Sensor Tags , The Third ACM Workshop on Hot Topics in Wireless (ACM HOTWIRELESS 2016) in conjunction with ACM MobiCom, October 2016, New York, USA.

[7] Ambuj Varshney, Luca Mottola, Mats Carlsson, Thiemo Voigt, Directional Transmissions and Receptions for High-throughput Bulk Forwarding in Wireless Sensor Networks , The 13th ACM Conference on Embedded Networked Sensing Systems (ACM SENSYS 2015). 2015, Seoul, South Korea. Acceptance rate 20% (27/132) Video of the talk

[8] Bo Wei, Ambuj Varshney, Wen Hu, Neal Patwari, Thiemo Voigt, Chun Tung Chou dRTI: Directional Radio Tomographic Imaging , The 14th International Conference on Information Processing in Sensor Networks (ACM/IEEE IPSN 2015), 2015, Seattle, USA. Acceptance Rate 24%

[9] Ambuj Varshney, Luca Mottola, Thiemo Voigt Using Directional Transmissions and Receptions to reduce contention in Wireless Sensor Networks , In Proceedings of the 5th International Workshop on Real-world Wireless Sensor Networks (REALWSN), Como Lake (Italy), September 2013.

Posters and Demos:

[10] Abdullah Hylamia, Ambuj Varshney , Andreas Soleiman, Panagiotis Papadimitratos, Christian Rohner, Thiemo Voigt , “Demo: Towards Battery-free Radio Tomographic Imaging”, In Proceedings of the 11th ACM Conference on Security and Privacy in Wireless and Mobile Networks (ACM WiSec 2018), Stockholm, Sweden, 2018 ( Best demonstration award at ACM WiSec 2018)

[11] Abdullah Hylamia, Marco Spanghero, Ambuj Varshney, Thiemo Voigt , Panagiotis Papadimitratos “Demo: Security on Harvested Power”, In Proceedings of the 11th ACM Conference on Security and Privacy in Wireless and Mobile Networks (ACM WiSec 2018), Stockholm, Sweden, 2018

[12] Carlos-Perez Penichet, Claro Noda Ambuj Varshney, Thiemo Voigt , “Demonstration: Battery-free 802.15.4 Receiver”, in Proceedings of the The 17th International Conference on Information Processing in Sensor Networks (ACM/IEEE IPSN 2018), 2018

[13] Andreas Soleiman, Ambuj Varshney , Thiemo Voigt Poster: Battery-free Visible Light Sensing , 23rd Annual International Conference on Mobile Computing and Networking (ACM MOBICOM 2017), October 2017, Snowbird, Utah, USA. ( Poster won the first prize at the ACM Student Research Competition at ACM Mobicom 2017)

[14] Andreas Soleiman,Ambuj Varshney, Luca Mottola, Thiemo Voigt Demo: Battery-free Visible Light Sensing , The Fourth ACM Workshop on Visible Light Communication Systems (ACM VLCS 2017) in conjunction with ACM MobiCom, October 2017, Snowbird, Utah, USA.

[15] Ambuj Varshney, Carlos Perez Penichet, Christian Rohner, Thiemo Voigt Demo: LoRea: A Backscatter architecture that achieves a long communication range , The 15th ACM Conference on Embedded Networked Sensor Systems (ACM SENSYS 2017), Delft, Netherlands.

[16] Carlos Perez Penichet, Claro Noda, Ambuj Varshney Thiemo Voigt Poster: Augmenting WSNs with Interoperable 802.15.4 Sensor Tags , The 15th ACM Conference on Embedded Networked Sensor Systems (ACM SENSYS 2017), Delft, Netherlands.

[17] Carlos Perez Penichet, Frederik Hermans, Ambuj Varshney , Thiemo Voigt Demo: Passive Sensor Tags , 22nd Annual International Conference on Mobile Computing and Networking (ACM MOBICOM 2016), October 2016, New York, NY, USA.

[18] Kasun Hewage,Ambuj Varshney, Abdalah Hilamia, Thiemo Voigt modBulb: A Modular Light Bulb for Visible Light Communication, The Third ACM Workshop on Visible Light Communication Systems (ACM VLCS 2016) in conjunction with ACM MobiCom, October 2016, New York, USA.

[19] Abdalah Hilmia, Kasun Hewage, Ambuj Varshney, Christian Rohner, Thiemo Voigt BouKey: location-based key sharing using visible light communication , The Fifteenth International Conference on Information Processing in Sensor Networks (ACM/IEEE IPSN '16), 2015, Vienna, Austria.

[20] Elena Di Lascio, Ambuj Varshney, Thiemo Voigt, Carlos Pérez-Penichet LocaLight: a battery-free passive localization system using visible light, The Fifteenth International Conference on Information Processing in Sensor Networks (ACM/IEEE IPSN '16), 2015, Vienna, Austria. Poster

[21] Ambuj Varshney, Luca Mottola, Thiemo Voigt Coordination of Wireless Sensor Networks using Visible Light , The 13th ACM Conference on Embedded Networked Sensor Systems (ACM SENSYS 2015), Seoul, South KoreaPoster

[22] Ambuj Varshney, Luca Mottola, Thiemo Voigt, “Directional transmissions and receptions for burst forwarding using disjoint paths”, in Proceedings of the 13th ACM/IEEE International Conference on Information Processing in Sensor Networks (ACM/IEEE IPSN 2014), Berlin, Germany,2014

[23] Ambuj Varshney, Luca Mottola, Thiemo Voigt, “Directional Transmissions and Receptions for High Throughput Burst Forwarding“ , The 11th ACM Conference on Embedded Networked Sensor Systems (ACM SENSYS 2013), Rome, Italy.

PhD theses:

[24] Ambuj Varshney, “Enabling Sustainable Networked Embedded Systems“ , Uppsala University, 2018.
Advisors: Prof Thiemo Voigt (Uppsala and SICS), Prof. Luca Mottola (Politecnico di Milano, Italy and SICS)
Ph.D theses opponent: Prof Prabal Dutta (University of California, Berkeley)
Ph.D grading committee: Assoc. Prof Domenico Giustiniano, Asst. Prof Olga Saukh , Prof. Andreas Kasslar

Preprints and Arxiv:

[25] Ambuj Varshney, Luca Mottola, Thiemo Voigt Visible Light Communication for Wearable Computing , ArXiv Preprint.

[26] Ambuj Varshney, Oliver Harms, CP Penichet, Christian Rohner, Frederik Hermans, Thiemo Voigt LoRea : A backscatter reader for everyone! , ArXiv Preprint.

[27] Bo Wei, Ambuj Varshney, Wen Hu, Neal Patwari, Thiemo Voigt, Chun Tung Chou dRTI: Directional Radio Tomographic Imaging , ArXiv preprint.

Other publications:

[28] E. Rick, F. Ragnarsson, T. Holmberg, E. Fröjd, V. Rivas, A. Varshney , L. Corneo, C. Rohner, T. Voigt, P. Gunningberg, "Environmental Control at the Edge", 14th Swedish National Computer Networking Workshop, 2018, Karlskrona, Sweden

[29] Ambuj Varshney, Carlos Perez Penichet, Christian Rohner, Thiemo Voigt Demo: LoRea: A Backscatter architecture that achieves a long communication range , Swedish Communication Technologies Workshop (Swe-CTW 2018), Linköping, Sweden

[30] Maximilian Stiefel, Elmar van Rijnswou, Carlos Pérez-Penichet, Ambuj Varshney , Christian Rohner and Thiemo Voigt, "Enabling Ambient Backscatter Using a Low-Cost Software Defined Radio", 13th Swedish National Computer Networking Workshop, 2017, Halmstad, Sweden

[31] Juan M Alonso, Thiemo Voigt, Ambuj Varshney, "Bounds on the Lifetime of WSNs", In 5th International Workshop on Performance Control in Wireless Sensor Networks in conjunction with IEEE DCOSS, May 2013, Massachusetts, USA.

[32] Carlos Pérez-Penichet, Ambuj Varshney, Frederik Hermans, Christian Rohner, Thiemo Voigt, "Do Multiple Bits per Symbol Increase the Throughput of Ambient Backscatter Communications?", International Workshop on New Wireless Communication Paradigms for the Internet of Things (MadCom 2016) in conjunction with EWSN, Graz, Austria, 2016.

[33] Ambuj Varshney, Prabhat Ranjan, “Improved Wireless Image Sensor Network to Monitor Tiger Movement“, International Conference on Wireless Communication and Sensor Network(WCSN), Panna, India, 2011.