Maximum Likelihood Frequency Synchronization Using Oversampled Signals in OFDM Systems

• Main Authors: Kai-Lan Tang, 湯凱嵐
• Other Authors: Tsung-Hsien Liu
• Format: Others
• Language: zh-TW
• Published: 2005
• Online Access: http://ndltd.ncl.edu.tw/handle/74017833534426318738

碩士 === 國立中正大學 === 通訊工程研究所 === 93 === As the wireless local area network (WLAN) becomes more and more popular,the research on WLAN attracts many people.The orthogonal frequency division multiplexing (OFDM) technique is adopted by the IEEE 802.11a WLAN and ASTM.OFDM system is composed by multiple subcarriers. Because OFDM system is overlapping in spectrum, so any frequency offset will destroy the orthogonality between carriers.And it will make signals be lost. So it is important in OFDM system that how to keep the orthogonality. In this paper we use oversampled techniche to improve the performance of frequency offset estimation. And it will show that our proposed oversampled technique performance having better performance. Frequency offset estimation's accuracy increase.