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Registered DEVICE FOR COMPENSATING RADIO FREQUENCY DISTORTION IN ORTHOGONAL FREQUENCY DIVISION MULTIPLE

직교 주파수 분할 다중화 방식의 무선 시스템에서 디지털/아날로그 변환에 의한 고주파 왜곡 현상의 보상 장치 및 그 방법
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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
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Status Patent Country KIPRIS
Registered 직교 주파수 분할 다중화 방식의 무선 시스템에서 고주파 왜곡 현상의 보상 장치 및 방법 KOREA KIPRIS