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등록 MB-OFDM UWB 시스템에서 sampling clock offset 및 Multipath에 의한 성능 열화 감쇠 방안

MB-OFDM UWB 시스템에서 sampling clock offset 및 Multipath에 의한 성능 열화 감쇠 방안
이미지 확대
발명자
신철호, 강규민, 최상성, 최성우, 박광로, 조상인
출원번호
11635272 (2006.12.07)
공개번호
20070133392 (2007.06.14)
등록번호
7729238 (2010.06.01)
출원국
미국
협약과제
초록
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