发明名称 |
Method and apparatus for detecting a jammed channel in a block oriented digital communication system |
摘要 |
A method and apparatus for detecting a channel jammed by narrowband jamming interference in a block oriented digital transmission system such as an orthogonal frequency division multiplexing (OFDM) or discrete multi-tone (DMT) system. A spectrum of a received data bearing signal is examined to identify areas of the spectrum that are likely corrupted by a narrowband jamming interference. The method identifies jammed channels by applying a boxcar filter, in order to identify narrow peaks in the spectrum that are substantially larger in magnitude than adjacent channels. Channels identified as jammed or affected by a jamming signal, are listed in a jam mask used for screening out corrupted channels during data transmission.
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申请公布号 |
US2003235254(A1) |
申请公布日期 |
2003.12.25 |
申请号 |
US20020177663 |
申请日期 |
2002.06.24 |
申请人 |
COGENCY SEMICONDUCTOR INC. |
发明人 |
FANSON JOHN LOUIS;TAYLOR DOUGLAS HAMILTON;LYNCH BRADLEY ROBERT |
分类号 |
H04K3/00;H04L1/20;H04L27/26;(IPC1-7):H04K1/10 |
主分类号 |
H04K3/00 |
代理机构 |
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地址 |
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