发明名称 |
ADSL MODEM INSTRUMENT AND METHOD FOR COMMUNICATION |
摘要 |
<P>PROBLEM TO BE SOLVED: To enable synchronization of a hyper-frame and a synchronization of a symbol to be simultaneously established and to surely establish the synchronizations even when the distance between an ATU-C and an ATU-R becomes large. <P>SOLUTION: An ADSL modem apparatus 2 that serves as an ATU-R receives a signal in a hyperframe format having FEXT and NEXT parts, when an initialization sequence is started, the signal configured with a known number of symbols. The received signal is sampled by an AFE 13 and stored in a buffer memory 278a of an FET unit 27. A processor 20 establishes a symbol synchronization and a hyperframe synchronization upon receiving an original signal based on sample data of the original signal, the original signal having REVERB signals during a FEXT period and non-REVERB signals distinguishable from the REVERB signals during a NEXT period. <P>COPYRIGHT: (C)2004,JPO |
申请公布号 |
JP2004064444(A) |
申请公布日期 |
2004.02.26 |
申请号 |
JP20020220332 |
申请日期 |
2002.07.29 |
申请人 |
PANASONIC COMMUNICATIONS CO LTD |
发明人 |
NOMA NOBUHIKO;IMAI TATSUO;TOMITA KEIICHI |
分类号 |
H04J11/00;H04L7/08;H04L12/00;H04L27/26 |
主分类号 |
H04J11/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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