发明名称 |
Symbol synchronizer using modified early/punctual/late gate technique |
摘要 |
A method and apparatus for synchronizing symbol timing for a QPSK demodulator. A matched filter pair outputs respective "early-punctual-late" signals. The early and late signals are input to a symbol synchronizing estimator that produces an interpolation control signal used by the filters to synchronize the symbol timing to the sample timing. The punctual signal is output as an information bearing signal representing the received inphase and quadrature signals. The matched filters are interpolating matched filters. The symbol synchronizing estimator normalizes the early and late signals in a manner that allow the demodulator to "flywheel" over signals having a low signal to noise ratio below a predetermined threshold. |
申请公布号 |
AU3593295(A) |
申请公布日期 |
1996.05.06 |
申请号 |
AU19950035932 |
申请日期 |
1995.09.20 |
申请人 |
WESTINGHOUSE ELECTRIC CORPORATION |
发明人 |
BRIAN W KROEGER;JOSEPH B BRONDER;TOD A OBLAK;JEFFREY S BAIRD |
分类号 |
H03L7/099;H04L7/00;H04L7/02;H04L27/227 |
主分类号 |
H03L7/099 |
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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