Calibration method for Tx/Rx path characteristic of channel sounder
AssigneeElectronics and Telecommunications Research Institute
InventorsSung-Jun Lee, Kwang-Chun Lee, Hyun-Kyu Chung
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Abstract
The method includes 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 ith digital data corresponding to an ith 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 ith digital data and performing sliding correlation on the decimated data, and extracting attenuation and phase characteristics of the ith receiver wired path by extracting samples after the time delay among the decimated samples.
Claims10
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 ith digital data corresponding to an ith 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 ith digital data and performing sliding correlation on the decimated data;
- and
- extracting attenuation and phase characteristics of the ith receiver wired path by extracting samples after the time delay among the decimated samples.
A method for calibrating a path characteristic of a transmitter of a wireless spatial channel measurement apparatus which includes the transmitter for transmitting a spread spectrum signal through N transmission antennas and a 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 N wired paths connecting the N transmission antennas with one of the M reception antennas through N cables;
- separating ith digital data corresponding to an ith transmitter wired path from the plurality of digital data stored in the receiver wherein i is a natural number greater than 1 and smaller than N;
- extracting a time delay by decimating the separated ith digital data and performing sliding correlation on the decimated data;
- and
- extracting attenuation and phase characteristics of the ith transmitter wired path by extracting samples after the time delay among the decimated samples.
Dependencies are inferred from the claim text.