Apparatus and method for estimating parameter of multi path signal

A method for estimating a parameter of a multi path signal, performed by an apparatus comprising a processor and a memory in which one or more commands executed by the processor are stored, the method comprising:

• pre-processing, by the processor, respective path signals received through a plurality of antennas;
• approximating, by the processor, a parameter set of the respective pre-processed path signals to have a sparse characteristic in a Doppler frequency and angle of arrival domain;
• and
• estimating, by the processor, an angle of arrival for a plurality of reception signals in each frequency region of the Doppler frequency and angle of arrival domain,
• wherein approximating a parameter set of the respective pre-processed path signals comprises approximating a candidate group of a Doppler frequency movement amount as a basis component of an FFT matrix, based on a sampling time interval and an FFT size.