FPGA Implementation of Direction of Arrival Estimation Method for Polarization Sensitive Array

To solve the problem that embedding the traditional complex MUlti SIgnal Classification (MUSIC) algorithm directly into the Field Programmable Gate Array (FPGA) will consume a lot of hardware resources and computing time, a FPGA implementation scheme of real MUSIC based on polarization sensitive array is proposed. A real value preprocessing method is proposed based on the centrosymmetric property of circular distributed polarization sensitive array. The proposed approach introduces linear transformation on the received signal, thus simplifying the subsequent calculation of polarization MUSIC algorithm. The FPGA scheme reduces the time consumption of the algorithm through the parallel calculation of the covariance matrix module, the parallel Jacobi algorithm of multi-level sweeping in the eigenvalue decomposition module, the multi-scale spectral peak search and the pipeline work of each module. The experimental results show that compared with complex polarization MUSIC, this scheme reduces greatly the hardware resource consumption and time consumption. © 2023 Science Press. All rights reserved.