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Registered A DIGITAL CLIPPING METHOD FOR A TRANSMITTER OF AN ORTHOGONAL FREQUENCY DIVISION MULTIPLE ACCESS SYSTEM
이미지 확대
A DIGITAL CLIPPING METHOD FOR A TRANSMITTER OF AN ORTHOGONAL FREQUENCY DIVISION MULTIPLE ACCESS SYSTEM
- Inventors
- Park Hyeong Sook, 박윤옥
- Application No.
- 11721156 (2005.10.26)
- Publication No.
- 20100046662 (2010.02.25)
- Registration No.
- 8406320 (2013.03.26)
- Country
- UNITED STATES
- Abstract
- The present invention relates to a digital clipping method for reducing a high peak-to-average power ratio (PAPR) of a transmission signal in a transmitter of an orthogonal frequency division multiplexing access (OFDMA) system. In the method, a) the transmission signal to be digitally clipped is divided into real and imaginary parts, b) magnitudes of the real and imaginary part signals are divided into a plurality clipping levels, and c) the transmission signal is respectively clipped by comparing the real and imaginary part signals with the plurality of clipping levels while allowing phase errors. In c), a plurality of comparators is used to respectively compare the real and imaginary parts of the complex number transmission signal with the plurality of clipping levels.
- KSP Keywords
- Average Power, Complex Number, Frequency division, Frequency division multiple access(FDMA), Frequency division multiplexing, Imaginary part, Orthogonal Frequency Division Multiple Access(OFDMA), Orthogonal frequency division Multiplexing(OFDM), Peak-to-Average-Power-Ratio(PAPR), division multiplexing, multiple access, phase error, power ratio