发明名称 |
SYMBOL TIMING RECOVERY NETWORK FOR A CARRIERLESS AMPLITUDE PHASE (CAP) SIGNAL |
摘要 |
A symbol timing recovery (STR) error detector includes a complex multiplier and a Gardner-type symbol timing error estimator for operation with carrierless amplitude phase (CAP) signals. Quadrature Ir and Qr signals from the system are input to the complex multiplier, which also receives signals from a numerically controlled oscillator operating at the CAP center frequency. The output of the complex multiplier is provided to the input of the Gardner STR error estimator. An added frequency shift allows the Gardner error estimator to function with CAP signals. The output from the error estimator is provided to a loop filter the output of which is provided to an oscillator which generates the symbol timing information for a symbol sampling network. |
申请公布号 |
EP0970575(A1) |
申请公布日期 |
2000.01.12 |
申请号 |
EP19980910180 |
申请日期 |
1998.03.05 |
申请人 |
THOMSON CONSUMER ELECTRONICS, INC. |
发明人 |
KNUTSON, PAUL, GOTHARD |
分类号 |
H04L27/38;H04L7/00;H04L7/033;H04L25/49;(IPC1-7):H04L25/49 |
主分类号 |
H04L27/38 |
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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