Emergency communication optimization method for low earth orbit satellite heterogeneous network

Abstract

The invention discloses an emergency communication optimization method for a low earth orbit satellite heterogeneous network. The method comprises the following steps: calculating propagation loss of a communication link in the low earth orbit satellite heterogeneous network and gain in a linear array direction, and calculating a received signal of a ground terminal and an intensity ratio of the signal to interference plus noise; the energy efficiency of the low-orbit satellite and the ground network is maximized by optimizing the transmitting power of a ground base station, then the optimization problem of the transmitting power is solved through a continuous convex approximation algorithm, and regularization factors are introduced into the optimization problem of the transmitting power and limiting conditions of the optimization problem. According to the method, the antenna array radiation gains of the satellite base station and the ground base station and the signal transmission path length are calculated respectively, and the energy efficiency of the whole network is maximized by adjusting the transmitting power, the beam forming strategy and the resource allocation based on a channel recoil response function expression and path loss characteristics through an optimization algorithm.

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