Receiving device

A receiving device that receives a reception signal in which a first component and a second component are spatially multiplexed or polarization multiplexed, the receiving device comprising, for each of the first component and the second component:

• a first resampler to convert a sampling rate of a part of the reception signal containing a corresponding component, and output a first signal that is a signal having been subjected to sampling rate conversion;
• a second resampler to convert a sampling rate of a part of the reception signal containing a component other than the corresponding component, and output another component signal that is a signal having been subjected to sampling rate conversion;
• an equalizer to perform an adaptive equalization process using the first signal and the another component signal as an input, and output a second signal that is a signal having been subjected to the adaptive equalization process and having a sampling rate that is an integer fraction of an input signal;
• a correlation calculator to calculate a correlation function between the first signal and the second signal;
• and
• a rate controller to control a rate conversion ratio for sampling rate conversion in the first and second resamplers on a basis of the correlation function.