SOFTWARE DEFINED RADIO BASED ANGLE OF ARRIVAL FOR FIRST-RESPONDER SCENARIOS

Open Access
Author:
Desale, Pradyumna Vasudeo
Graduate Program:
Electrical Engineering
Degree:
Master of Science
Document Type:
Master Thesis
Date of Defense:
April 27, 2010
Committee Members:
  • Sven G Bilen, Thesis Advisor
Keywords:
  • Angle of Arrival
  • Multi Stage Nested Wiener Filter
  • Software Defined Radio
Abstract:
The maturing of Software-defined-radio (SDR) technology and evolving concepts of Cognitive Radios hold great promise for improved integrated communication in a disaster or first-responder scenario. The first responder can better focus on the incident or threat by effecting radio operations ranging from routine to complex through the use of cognitive radio. A SDR-based Direction-of-Arrival System can detect available and authorized RF resources, can use knowledge of geolocation, spectrum, and network to minimize interference, automatically reconfigure, and connect to the network. This thesis explores specific examples of how a SDR with geolocation capabilities can be implemented for disaster scenarios. Specifically, we investigate angle-of-arrival (AOA) methods and propose a reduced subspace method for low complexity 2-D AOA method. Fading and interference effects are also investigated through simulations. A proof-of-concept model is evaluated for such a system on Universal Software Radio Peripheral (USRP) and GNU radio platform and a plan for implementing a planar array based angle-of-arrival scheme on the USRP platform is proposed.