Single Transmitter Direction Finding Using a Single Moving Omnidirectional Antenna

Guy Eliyahu, Amnon Menashe Maor, Roei Meshar, Reem Mukamal, Anthony J. Weiss*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Traditional direction-finding systems are based on processing the outputs of multiple spatially separated antennas. The impinging signal Angle-of-Arrival (AOA) is estimated using the relative phase and amplitude of the multiple outputs that are sampled simultaneously. Here, we explore the potential of a single moving antenna to provide useful direction finding of a single transmitter. If the transmitted signal frequency is steady enough during the collection of data, a single antenna can be moved while tracking the phase changes to provide an Angle-of-Arrival measurement. The advantages of a single-antenna sensor include the sensor size, the lack of a need for multiple-receiver synchronization in time and frequency, the lack of mutual antenna coupling, and the cost of the system. However, a single-antenna sensor requires an accurate knowledge of its position during the data collection and it is challenged by transmitter phase instability, signal modulation, and transmitter movement during the measurement integration time. We analyze the performance of the proposed sensor, support the analysis with simulations and finally, present measurements performed by hardware configured to check the validity of the proposed single-antenna sensor.

Original languageEnglish
Article number9208
JournalSensors
Volume22
Issue number23
DOIs
StatePublished - Dec 2022

Funding

FundersFunder number
Israel Innovation Authority4795/1, 4795/2

    Keywords

    • Angle-of-Arrival (AOA)
    • Cramér–Rao Lower Bound (CRLB)
    • Direction of Arrival (DOA)
    • Single Sensor
    • direction finding (DF)

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