Patent ID: 8477866

Claim:
A method for calibrating a path characteristic of a receiver of a wireless spatial channel measurement apparatus which includes a transmitter for transmitting a spread spectrum signal through N transmission antennas and the receiver for receiving the spread spectrum signal received through M reception antennas, converting the received signal to a plurality of digital data, and storing the digital data where M and N are an natural number, the method comprising: performing a wired back-to-back test by forming M wired paths connecting one of the N transmission antennas with the M reception antennas through M cables; separating i th digital data corresponding to an i th receiver wired path from the plurality of digital data stored in the receiver wherein i is a natural number greater than 1 and smaller than M; extracting a time delay by decimating the separated i th digital data and performing sliding correlation on the decimated data; and extracting attenuation and phase characteristics of the i th receiver wired path by extracting samples after the time delay among the decimated samples.