직교 주파수 분할 다중화 방식의 무선 시스템에서 디지털/아날로그 변환에 의한 고주파 왜곡 현상의 보상 장치 및 그 방법
정재호, 이광천, 강병수, 이성준, 김준형, 권헌국
- 7929639 (2011.04.19)
- The present invention relates to a device for compensating a radio frequency distortion caused by a sample/hold operation of a digital/analog converter in an orthogonal frequency division multiplexing (OFDM) transmission system, and a method thereof. In a digital transmission system, an edge frequency signal of a transmission signal band is distorted by a sample/hold operation of a digital/analog converter such that a signal attenuation is generated at a frequency domain by a sync function having a zero point at a sample frequency of a transmission signal. In the present invention, the signal distortion may be compensated by multiplying a coefficient of an inverse sync function by a signal weight value at the frequency domain, and it may be compensated by using a single multiplier and a lookup table storing the coefficient of the inverse sync function.
- KSP 제안 키워드
- Analog Converter, Frequency division, Frequency division multiplexing, Frequency signal, Orthogonal frequency division Multiplexing(OFDM), Radio Frequency(RF), Sample frequency, Signal Attenuation, Transmission system, digital transmission, division multiplexing, frequency distortion, frequency domain(FD), look-up table, signal distortion, weight value, zero point