FPGA IMPLEMENTATION OF HIGH-PERFORMANCE DOA ESTIMATION USING A UNIFORM CIRCULAR ARRAY

Abstract

In this paper, the author presents a signal processing hardware architecture that locks the frequencies of signals of interest present at the input, tracks them if their frequency changes and estimates the direction-of-arrival (DOA) of the interest signals using a uniform circular array. The proposed hardware architecture is described in detail, implemented and verified by practical experiments on FPGA chip. Experimental results show that the DOA estimation accuracy is smaller than 1 degree. This DOA estimation accuracy is suitable for electronic attack systems.