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In OFDM burst communication system, frame synchronization plays a vital role and it directly affects the performance of the entire communication system. This paper proposes a frame synchronization scheme with energy detection and accurate synchronization for Power Channel which presents strong interference, poor time-varying and severe frequency select. Experimental results show that the frame synchronization...
The annual series of δ 13 C were measured in tree rings of three Cryptomeria fortunei disks (CF-1, CF-2, and CF-3) collected from West Tianmu Mountain, Zhejiang Province, China, according to cross-dating tree ring ages. There was no obvious decreasing trend of the δ 13 C annual time series of CF-2 before 1835. However, from 1835 to 1982 the three tree ring δ 13 C annual series...
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