MIMO detection method and device based on EPA, equipment and storage medium

The invention discloses an EPA-based MIMO detection method, apparatus and device, and a storage medium. The method comprises the steps of obtaining a variance of approximate joint posterior probability distribution of a sending signal corresponding to each antenna of a transmitting end according to an MIMO channel matrix and a noise variance; in each iteration, acquiring a plurality of antenna serial numbers corresponding to larger variance according to a sequence from large variance to small variance, taking the antenna serial numbers as indexes, and determining the number of the indexes according to the current iteration frequency and a preset pruning degree; calculating a mean value of corresponding edge distribution of alternative distribution corresponding to the index in the current iteration according to the mean value of the cavity edge distribution in the last iteration, and updating a mean value vector of the alternative distribution and the mean value of the cavity edge distribution in the current