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Article

Extended reactance domain algorithms for DoA estimation onto an ESPAR antennas

, 2015

International Journal of Electronics, 12, 1, 1-14, Septembre 2015

Résumé

Based on an extended Reactance Domain (RD) covariance matrix, this paper proposes new alternatives for Directions of Arrival (DoAs) estimation of narrowband sources through an Electronically Steerable Parasitic Array Radiator (ESPAR) antennas. Because of the Centro symmetry of the classic ESPAR antennas, an unitary transformation is applied to the collected data that allow an important reduction in both computational cost and processing time and, also, an enhancement of the resolution capabilities of the proposed algorithms. Moreover, this paper proposes a new approach for Eigenvalues estimation through only some linear operations. The developed DoAs estimation algorithms based on this new approach has illustrated a good behaviour with less calculation cost and processing time as compared to other schemes based on the classic Eigenvalues approach. The conducted simulations demonstrate that high-precision and high-resolution DoAs estimation can be reached especially in very closely sources situation and low sources power as compared to the RD-MUSIC algorithm and the RD-PM algorithm. The asymptotic behaviours of the proposed D