Method for Radio Direction Finding and Channel Sounding

­The Problem:
Radio direction finding is a technique used to determine the angle of arrival (AoA) of an incoming radio-frequency wave signal to understand the propagation environment in urban and suburban settings. The AoA estimation is widely utilized in emergency services, geolocation of cell phones, amateur HAM radios, and will serve in connecting future city infrastructure. Traditional direction-finding systems employ a multiple-antenna system with multiple receivers which use complex algorithms to estimate the AoA . Although such systems are accurate, they require multiple receivers, complex algorithms, and are often expensive, cumbersome, and bulky.

The Solution:
Researchers at the University of Alabama have developed a low cost, highly portable, and small form factor software-defined radio (SDR) based Pseudo-Doppler Antenna Array (PDAA), which is capable of operating both direction finding and channel sounding at 2.4 GHz, and a corresponding channel sounding and direction finding algorithm. This invention combines channel sounding and direction finding hardware and software into one portable package, reducing weight, cost, complexity, and power consumption.


  • Potential 5G applications.
  • Portable, less bulky.
  • Reduces cost.
  • Reduces power consumption.

The University of Alabama Research Office of Innovation and Commercialization (OIC) is a non-profit corpo­ration that is responsible for commercializing University of Alabama technologies and for supporting University research. At OIC, we seek parties that are interested in learning more about our technologies and commercialization opportunities, and we welcome any inquiries you may have.


Contact Information

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Name: Lynnette Scales

Title: Administrative Assistant

Department: Office for Innovation & Commercialization


Phone: (205) 348-5433