发明名称 |
Digitally-implemented demodulator |
摘要 |
A digitally implemented demodulator. A frequency-modulated signal is applied to a limiting amplifier such that the signal amplitude is fixed at a constant level. The signal is undersampled and quadrature demodulated. The demodulator generates the cross-product of the baseband complex envelope to recover the original modulating signal. A digital Frequency Shift Keyed signal can be further recovered by applying the recovered signal to a data slicer to square-up the signal, and a matched filter for improved error resistance.
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申请公布号 |
US6914946(B1) |
申请公布日期 |
2005.07.05 |
申请号 |
US20000696410 |
申请日期 |
2000.10.25 |
申请人 |
VTECH COMMUNICATION, LTD. |
发明人 |
HORVAT DION CALVIN MICHAEL;TANI JOHN AKIRA;JELEA FLORIN |
分类号 |
H03D3/00;(IPC1-7):H04L27/14 |
主分类号 |
H03D3/00 |
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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