Abstract: A correlation domain wideband algorithm RELAX based on signals separation category is proposed. This algorithm can estimate the direction of arrival (DOA) of wideband sources in the presence of arbitrary antenna array model errors. By using the matrix operators with memory and oblivion characteristics, this algorithm can separate incident signals effectively. Compared with the traditional wideband DOA estimation algorithms which are based on the subspace theory, this algorithm can relax the requirement of the array model’s precision within certain limits. So it has a good prospect in engineering application. This article analyzed and proved the mechanism of signals separation and the robustness of this algorithm in relation to array model errors. The validity and robustness of this algorithm, in the presence of array model errors, are confirmed by theoretical analysis and simulation results.

Key words: array model errors, DOA, wideband, robustness, signals separation