BROWSE
Detail
Registered APPARATUS FOR CANCELLING DC OFFSET AND METHOD THEREOF
- Inventors
- Yong Su Lee, 박윤옥, Hong Eon Young
- Application No.
- 11721139 (2005.09.06)
- Publication No.
- 20100128819 (2010.05.27)
- Registration No.
- 8170147 (2012.05.01)
- Country
- UNITED STATES
- Abstract
- An apparatus and method for canceling a DC offset efficiently removes the DC offset by calculating the DC offset after acquiring synchronization in a terminal receiver used for an orthogonal frequency division multiplexing system. The apparatus for canceling the DC offset includes an adding/averaging unit (130), an accumulator (140), a synchronization determiner (150), and a pulse density modulation signal generator (160). The adding and averaging the added input data signals over one frame. The accumulator (140) outputs a DC offset control value by successively accumulating the DX offsets calculated from the adding and averaging unit. The synchronization determiner (150) determines whether to output the DC offset control value provided by the accumulator (140) based on synchronization information. The pulse density modulation signal generator (160) generates a digital pulse density modulation signal based on a representative value provided by the synchronization determiner (150).
- KSP Keywords
- DC-offset, Density modulation, Frequency division, Frequency division multiplexing, Orthogonal frequency division Multiplexing(OFDM), Pulse density, Representative value, Signal Generator, dc offset control, division multiplexing, input data, modulation signal, pulse density modulation, signal based