TCI’s Pioneering Hybrid Geolocation Technology Selected by Macedonia

Fremont, CA – The Republic of Macedonia’s Agency for Electronic Communications (AEK) has awarded TCI a multi-million dollar contract to supply, install and commission a technologically innovative National Spectrum Monitoring and Geolocation system for the country.

The TCI contract provides AEK with the world’s first national system for hybrid geolocation of radio transmitters based on integrating angle-of-arrival (AOA) and time-difference-of-arrival (TDOA) techniques for enhanced speed and precision. The system employs the latest digital signal processing technology to cover the 9 kHz to 40 GHz frequency range, and is fully compliant with ITU recommendations. It includes the following elements:

  • Eight HF/VHF/UHF fixed monitoring stations that will be installed in Skopje, Bitola, Shtip, Kumanovo, Tetovo, Ohrid, Furka and Strumica.
  • Three hybrid AOA/TDOA mobile monitoring units, covering the HF/VHF/UHF/SHF frequency range, to be deployed in Skopje, Bitola and Shtip.
  • Seventy-five TDOA Sensors capable of performing all ITU-recommended signal measurements, covering the main population centers of Macedonia.

The contract also includes portable test equipment, training and 36 months of warranty support.

About TCI
TCI International, Inc., is a wholly owned subsidiary of SPX Corporation. TCI provides spectrum monitoring, direction finding, and signal collection solutions to civilian, government, military and intelligence agencies, as well as antennas for communications and high-power radio broadcasting. TCI is headquartered in Fremont, California. For more information, visit