Target direction determination employing widely-spaced high resolution radars

Abstract

In this paper a simple technique which utilizes widely-spaced high resolution radars to derive a target direction is proposed. This method is based on the fact that a target direction can be determined if the range difference between the target and two separated antennas can be exactly obtained. We propose a simple but effective method to estimate the range difference by searching the range shift so that the correlation coefficient between the two received range profiles is maximum. Accuracy of the range difference estimation and therefore the derived direction can be improved by increasing the range resolution and decreasing the range shift increment. Numerical and experimental examples verify the effectiveness of the proposed method.