Separate Estimation of Angular Velocity and Angle for Digital Array Radar

Abstract

In this paper, we propose a method that enables one-dimensional estimation of angular velocity of a high-speed target by adding preprocessing to a received signal of a digital array radar. The proposed method enables two separate one-dimensional parameter estimations of angular velocity and angle, as opposed to the conventional method using two-dimensional searches. By one-dimensionalizing, both parameters can be calculated using monopulse principles, reducing the computational scale to approximately 1/1000 to 1/10,000 that of the conventional method. Meanwhile, computer simulation evaluations confirmed that the proposed method is better than the conventional method in terms of parameter estimation accuracy at a signal to noise power ratio (SNR) of around 15 dB, and it approaches the Cramer-Rao lower bound at high SNRs.