College of Engineering, Technology, and Computer Science

The Wireless Technology Laboratory (WTL) is a component of the IPFW Wireless Technology Center (WTC). The Director of the WTC is Professor Cooklev. Our research is sponsored by governmental agencies, such as the National Science Foundation, by private foundations such as the Eli Lilly Foundation, and by industrial companies, such as ITT Communication Systems and Raytheon.


The mission of the Wireless Technology Laboratory (WTL) is to provide a research and education environment in the area of wireless communication, and networking protocols and algorithms.

Types of Activities

  • Software Defined Radio
  • MIMO and diversity
  • Ad-hoc networking technology
  • Wireless network protocols
  • Cognitive Radio Wireless hardware
  • Power-limited communication protocols
  • Delay-tolerant communication
  • Broadband and Multiple and random access techniques

Affiliated Faculty

Current Projects

A Software Defined Radio Testbed for Research in Dynamic Spectrum Access

David Clendenen
Sponsor: NSF. Advisor: Dr. Cooklev, Co-Advisor: Dr. Chen
Wireless communication systems employ a transceiver (transmitter/receiver), located between the antenna and the baseband subsystem. An interesting aspect to consider is the connection between the different parts of the transceiver. The VITA Radio Transport provides an interoperability framework for Software Definable Radios (SDR) used for analysis of RF spectrum and localization of RF emissions. The framework is based upon a transport protocol to convey time-stamped signal data in IF Data packets and metadata in context packets.

A Real-Time Software Defined GPS Receiver

Jeremy Hershberger
Sponsor: NSF. Advisor: Dr. Thompson, Co-Advisor: Dr. Loos
Space-based global navigation systems have become a mainstay in providing navigation for aviation, ground and maritime operations. The US based Global Positioning System (GPS) has been integrated into many aspects of daily life. However, GPS receiver design can prove to be challenging depending on the operating environment of the user. Some receivers must perform multipath mitigation, whereas others must combat low signal strength. Designing specific environmental operating modes creates application-specific hardware architectures. The goal of a Software-Defined GPS (SDGPS) system is to create, solely through programming, a reconfigurable GPS receiver than can adapt to its environment. Traditional SDGPS systems utilize general purpose processors (GPP) capable of performing single instruction multiple data (SIMD) operations on previously stored data files in a non-real-time fashion. The goal of this research is aimed at implementing a SDGPS system at or near real-time operation.

Wireless Robot Communications System

Josh Thorn
Sponsor: NSF. Advisor: Dr. Thompson, Co-Advisor: Dr. Isaacs
Robots are often expected to perform in harsh environments. Communication systems for robots must be resilient in the face of fading and propagation losses while also having a maximal level of data throughput performance and communication range. They are often used to transmit video, which requires wide bandwidth. The goal of this research is to build a robot communication system which is adaptable and optimized for such requirements.

† MSE Student

Recent Publications

  • E. A. Thompson, N. Clem, I. Renninger, T. Loos,“Software-defined GPS receiver on USRP-platform,” Journal of Network and Computer Applications, July 2012, 35(4):1352-1360.
  • T. Cooklev, H. Dogan, R. Cintra, and H. Yildiz (2011). Generalized Prefix for OFDM Wireless Systems Over Quasi-static Channels. IEEE Transactions on Vehicular Technology.60 (8), 3684-3693. 
  • C.A. Pomalaza-Ráez, K. Ghaboosi, and K. Pahlavan, "A Cooperative Medical Traffic Delivery Mechanism for Multi-hop Body Area Networks," Proceedings of the 2011 IEEE International Symposium on Personal Indoor and Mobile Radio Communications (PIMRC), Toronto, Canada. 
  • M.I. Ashraf, L. Goratti, J. Haapola, C. Pomalaza-Ráez, "Distributed Semantic Algorithm for Power Constrained Publish/Subscribe Routing," Sixth International Conference on Intelligent Sensors, Sensor Networks and Information Processing (ISSNIP 2010), Dec 7 -10, 2010, Brisbane, Australia.
  • L. Stanchev and T. Cooklev, D. Clendenen, "Describing Radio Hardware and Software Using OWL-DL for Software Download and Certification," Wireless Innovation Conference (SDR'10), Nov 30 - Dec 3, 2010, Washington, DC.
  • C. Chen and C. Pomalaza-Ráez, "Implementing and Evaluating a Wireless Body Sensor System for Automated Physiological Data Acquisition at Home," International Journal of Computer Science and Information Technology, vol. 2, no. 3, pp. 24-38, June 2010.
  • C. Chen, Z. Chen, T. Cooklev, and C. Pomalaza-Ráez, "On Spectrum Probing in Cognitive Radio Networks: Does Randomization Matter?" in Proceedings of IEEE International Conference on Communication (ICC 2010), May 23-27, 2010, Cape Town, South Africa.
  • C. Chen, "Design of a Child Localization System on RFID and Wireless Sensor Networks," Journal of Sensors, vol. 2010, Article ID 450392, 2010.
  • C. Chen and Z. Chen, "Towards a Routing Framework in Ad Hoc Space Networks," International Journal of Ad Hoc and Ubiquitous Computing, vol. 5, no. 1, pp. 44-55, 2010.
  • Z. Chen, T. Cooklev, C. Chen, and C. Pomalaza-Ráez, "Modeling Primary User Emulation Attacks and Defenses in Cognitive Radio Networks," in Proceedings of 28th IEEE International Performance Computing and Communications Conference (IPCCC 2009), pp. 208-215, December 9-11, 2009, Phoenix, Arizona.
  • C. Chen and C. Pomalaza-Ráez, "Design and Evaluation of a Wireless Body Sensor System for Smart Home Health Monitoring," in Proceedings of IEEE Global Communications Conference (GLOBECOM 2009), Nov 30 - Dec 4, 2009, Honolulu, Hawaii.
  • C. Chen and Z. Chen, "Exploiting Contact Spatial Dependency for Opportunistic Message Forwarding," IEEE Transactions on Mobile Computing, vol. 8, iss. 10, pp. 1397-1411, October 2009.
  • J. Haapola, A. Rabbachin, L. Goratti, C. Pomalaza-Ráez, I. Opperman, "Effect of Impulse Radio-Ultrawideband Based on Energy Collection on MAC Protocol Performance," IEEE Transactions on Vehicular Technology, Vol. 58 No. 9, October 2009, pp. 4491 – 4506.
  • T. Sukuvaara and C. Pomalaza-Ráez, "Vehicular networking pilot system for vehicle-to-infrastructure and vehicle-to-vehicle communications," International Journal of Communication Networks and Information Security, vol. 1, No. 3. 2009.
  • J. Haapola, F. Martelli, C. Pomalaza-Ráez, "Application-Driven Analytic Toolbox for WSNs," Proceedings of the 8th International Conference on Ad Hoc Networks and Wireless, September 22-25, 2009, Murcia, Spain.
  • K. Ghaboosi, M. Latva-aho, R. Kohno, C. Pomalaza-Ráez, "eMAC: A Multi-channel Cognitive MAC Protocol for the Next Generation Wireless Networks," Proceedings of the 12th International Symposium on Wireless Personal Multimedia Communications, September 7 – 10, 2009, Sendai, Japan.