Passive Direction Finding Using Amplitude and Phase Comparison Techniques

Abstract

Amplitude and phase comparison methods are practical direction finding (DF) techniques for electronic support and electronic intelligence systems. The combination of amplitude and phase comparison methods improves the direction finding accuracy and at the same time the ambiguities of phase comparison method are resolved by amplitude comparison method. In this research, the important factors that affect the accuracy of direction finding algorithm, such as the number of antennas, antennas' placements and distances between antennas are analyzed with different signal to noise ratio (SNR) values. The root mean square (RMS) error values of direction of arrival estimates are presented and the antenna placement scenarios for high DF accuracy are acquired.