https://scholars.lib.ntu.edu.tw/handle/123456789/606961
標題: | GLRT-Based Preamble Sequence Detection in OFDM | 作者: | CHAR-DIR CHUNG Tsai C.-J Chen W.-C Hung F.-C CHAR-DIR CHUNG |
關鍵字: | carrier frequency offset;initial synchronization;Orthogonal frequency-division multiplexing;preamble sequence detection;timing offset;Orthogonal frequency division multiplexing;Signal detection;Cross correlations;Frequency synchronization;Generalized likelihood-ratio tests;Implementation complexity;Large delay spreads;Parameter acquisition;Performance degradation;Timing synchronization;Channel estimation | 公開日期: | 2021 | 卷: | 2021-April | 來源出版物: | IEEE Vehicular Technology Conference | 摘要: | In practical orthogonal frequency division multiplexing standards, preamble waveforms are adopted to facilitate timing synchronization, frequency synchronization and system parameter acquisition. Due to implementation simplicity, the crosscorrelation-based method is adopted to determine the transmitted preamble sequence in the literature. However, because of the lack of channel estimation, the crosscorrelation-based method suffers severe performance degradation in large delay spread channels. To solve the problem, a preamble sequence detection method based on the generalized likelihood ratio test (GLRT) principle is proposed and analyzed in the paper. Due to embedded channel estimation, the GLRT method is shown to provide the decision error performance robust to channel dispersion and outperform the conventional crosscorrelation-based method significantly in large delay spread channels, at cost of increased implementation complexity. ? 2021 IEEE. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85112402394&doi=10.1109%2fVTC2021-Spring51267.2021.9449049&partnerID=40&md5=b6eaae061cd3ff031be4589cc25a292c https://scholars.lib.ntu.edu.tw/handle/123456789/606961 |
ISSN: | 15502252 | DOI: | 10.1109/VTC2021-Spring51267.2021.9449049 |
顯示於: | 電機工程學系 |
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