A magnetically induced super-resolution magneto-optical recording medium capable of reproducing a recorded mark smaller in size than a beam spot, having recording tracks consisting of lands and grooves. The driving device includes a rectifier unit, a filter unit, a switch power conversion unit and a control unit. The main processor is configured to generate a matrix X that includes a plurality of column vectors selected from a codebook based on the second channel state, generate a matrix P1, wherein the matrix P1 is a block diagonal matrix having the matrix X for each block diagonal element, and generate a matrix P2.