Spectrum sharing method based on intelligent reflector discrete beam forming

In order to improve the wireless spectrum sharing efficiency, the invention provides a spectrum sharing method based on intelligent reflector discrete beam forming, and for a secondary base station, the method comprises the following main implementation steps: 1) obtaining channel state information; 2) establishing a joint optimization model; 3) optimizing the transmitting power of the secondary base station; 4) optimizing a discrete beam forming vector of the intelligent reflecting surface; 5) repeating the step 3) and the step 4) until convergence; and 6) carrying out Underlay spectrum sharing transmission on the secondary base station. In the method, a secondary base station continuously performs alternate iterative optimization on the transmitting power and the intelligent reflecting surface discrete beam forming until convergence, and in the process of optimizing the intelligent reflecting surface discrete beam forming, a quadratic fraction is converted into a linear expression to ...