직교주파수분할다중화 시스템의 기지국 스마트 안테나 무선 송신장치의 캘리브레이션 방법 및 장치
이용수, 방영조, 박윤옥, 손경열, 정재근
- 7940858 (2011.05.10)
- In a calibration apparatus in a communication system, a modulation unit calculates a reference signal by modulating a downlink signal, and a digital Intermediate Frequency (IF) unit converts the reference signal to an intermediate frequency signal. An up-converter converts the intermediate frequency signal to a Radio Frequency (RF) signal, and a down-converter generates a received signal for each of the paths from the RF signal to be transmitted through each path. A calibrator calculates a correction value for each path and a delay value by using the reference signal and the received signal for each path.
- KSP 제안 키워드
- Communication system, Frequency signal, Intermediate frequency, RF signals, Radio Frequency(RF), Radio frequency (rf), Reference signal, Up-converter, down-converter