发明名称 |
Modem with pilot symbol synchronization |
摘要 |
A modem, or a communication system, in its transmission section, has signal-formatting circuitry followed by circuitry for insertion of a sequence of pilot symbols into a sequence of data symbols outputted by the formatting circuitry. Placement of the insertion circuitry after the formatting circuitry permits a variety of formatting options without effecting the sequence of pilot symbols that serves as a time reference useful in detection of a signal transmitted by the modem. The reception section of the modem is equipped correspondingly to process a received composite signal of data symbols having a prescribed format and a sequence of pilot symbols. The reception section extracts the sequence of pilot symbols from the composite signal, and employs the pilot symbols to develop a time base for operation of circuitry for decoding the format of the received composite signal to extract data from the composite signal.
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申请公布号 |
US2005047496(A1) |
申请公布日期 |
2005.03.03 |
申请号 |
US20030640190 |
申请日期 |
2003.08.13 |
申请人 |
MCINTIRE WILLIAM K.;FONNESBECK DALE D.;HADDADIN OSAMA S. |
发明人 |
MCINTIRE WILLIAM K.;FONNESBECK DALE D.;HADDADIN OSAMA S. |
分类号 |
H04L7/00;H04L7/04;H04L25/03;(IPC1-7):H04B1/38 |
主分类号 |
H04L7/00 |
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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