Registered
DEVICE FOR COMPENSATING RADIO FREQUENCY DISTORTION IN ORTHOGONAL FREQUENCY DIVISION MULTIPLE
- Inventors
-
Jung Jaeho, Kwangchun Lee, Lee Sung Jun, Kim Joon Hyung, Kang Byung Su, Kwon Heon Kook
- Application No.
-
11527787 (2006.09.27)
- Publication No.
-
20070133698 (2007.06.14)
- Registration No.
- 7929639 (2011.04.19)
- Country
- UNITED STATES
- Project Code
-
05MM1100, Research on 4G Mobile Communications Technology,
Hwang Seung Ku
- Abstract
- 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 Keywords
- 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
- Family
-