A new algorithm of signal subspace based IPR for direction of arrival estimation

A novel approach of signal subspace based improved polynomial roots (SS-IPR) for direction of arrival (DOA) estimation is proposed. The new method uses signal subspace, instead of the original IPR method, to derive the coefficients of the polynomial for DOA estimation. When the number of signals is less compared with the array number, which is the most common situation in application, the computation burden and complexity can be reduced effectively. The theoretical derivation is given to formulate the new algorithm and simulations are conducted to show the validity and effectiveness of our method.