Radio signal complex envelope and carrier phase information combination BVR (beyond visual range) target direct positioning method

The invention relates to a radio signal complex envelope and carrier phase information combination BVR (beyond visual range) target direct positioning method, and the method comprises the steps: firstly building a mathematic model of an arrival signal complex envelope and carrier phase relative to target position parameters based on a signal BVR transmission model; secondly obtaining a multi-station array signal model; thirdly converting data received by a multi-station array antenna into frequency domain data through employing a base 2-FFT algorithm; fourthly building a mathematic optimization model combining an estimation target position parameter and the height of an ionized layer based on the prior observation of the height of the ionized layer and the maximum likelihood estimation rule; and finally designing a Newton-type iterative algorithm for BVR target positioning according to the matrix eigenvalue perturbation theory. The method can effectively improve the precision of the target positioning, can further improve the estimation precision of the height of the ionized layer on the basis of the prior observation of the height of the ionized layer, is higher in rate of convergence, does not need high-dimensional search, is reliable in performance, and is high in operation efficiency.