Direct Adaption Methods for Linear and Circular Antenna Arrays

Introduction. The mitigation of interferences that degrade the performance navigation systems constitutes one most significant problems contemporary satellite navigation. This problem is conventionally solved using digital adaptive space filters. Depending on a particular radio technical system, mathematical description signal processing methods may involve specific calculation structures implemented algorithms. For example, use centrosymmetric linear and circular antenna arrays in system allows such terms Toeplitz circulant sample covariance matrices, respectively, inversion matrices by means special numerical order to design filter. Aim. A comparative analysis algorithms carried out along with an estimation their inversion. previously obtained results this field are clarified. Materials . An algorithm was MATLAB environment experimental recordings signals jammers actual system. Results. new expression derived for estimating matrices. Formulae describe modification Bareiss matrix case complex Hermitian were introduced. computer simulation allowed highest be indicated. amount time taken based did not exceed 2.5 10⋅ −3 s 0.04 s, respectively. carrier-to-noise ratio processed at least 46 dB. Conclusion. formulae analyzed can used when implementing filtering signals.