MB-OFDM UWB 시스템에서 sampling clock offset 및 Multipath에 의한 성능 열화 감쇠 방안
신철호, 강규민, 최상성, 최성우, 박광로, 조상인
- 7729238 (2010.06.01)
- Provided is a method for adjusting Fast Fourier Transform (FFT) window positioning in a Multi Band Orthogonal Frequency Division Multiplexing Ultra-Wideband (MB-OFDM UWB) system. The method includes the steps of acquiring an initial FFT window position and a frequency hopping position, demodulating a received signal by using the initial FFT window position and the frequency hopping position acquired in the acquiring step, transmitting received data information to a Media Access Control (MAC) layer with a reception frame (RX frame) structure and judging at the MAC layer whether or not a packet error is occurred based on Frame Check Sequences (FCSs), and if no packet error is occurred, returning to the demodulating step, and if the packet error is occurred, changing a register map by using a predetermined interface line in a MAC-physical layer (MAC-PHY) interface to thereby adjust the FFT window position and the frequency hopping position, and then returning to the demodulating step.
- KSP 제안 키워드
- Clock offset, Fast Fourier, Fast Fourier transform, Fast fourier transform (fft), Frequency division, Frequency division multiplexing, MB-OFDM, MB-OFDM UWB, Mac layer, Media access, Orthogonal frequency division Multiplexing(OFDM), Physical Layer, Sampling clock, UWB system, Ultra-Wide Band(UWB), access control, data information, division multiplexing, fourier transform, frequency hopping, media access control(MAC), multi-band