Disambiguation of Measurement of Bearings in Lessbases Widerange Direction Finders by Algorithmic Creation of Additional «Virtual» Base

Abstract

An algorithm of disambiguation is presented for phase direction finders with direction-finding antenna elements no more than 3–5. Increase the number of measurement bases by mathematical transformations (addition, subtraction, etc.) of the results of measurements of the phase differences between the antenna pairs (bases) DF antenna array is proposed to obtain a unique value estimation bearing source of electromagnetic radiation. The received new differences of phases correspond to the differences between the phases of the radio signal that is not physically existing and called «virtual» antenna pairs (bases).

This article presents the results of researches of algorithm effectiveness of disambiguation of bearing of electromagnetic radiation source by wide-range phase direction finder with use of «virtual» bases.

According to the results of computer simulation it is advisable to apply the DF algorithm, including additional «virtual» bases in cases where there is a shortage of space for tight placement DF antenna array and processing radio signals in a wide band including frequencies over 5 GHz is required.