发明名称 |
Apparatus and method for signal acquisition in a FSK demodulator with integrated time and frequency tracking |
摘要 |
A signal detection circuit for receiving a digital baseband signal comprising an amplitude modulated symbol stream of Logic 0 symbols and Logic 1 symbols, each of the Logic 0 and Logic 1 symbols comprising S sequential samples, wherein the amplitude modulated symbol stream contains a preamble of N known symbols preceding a plurality of user data symbols. The signal detection circuit comprises: A) a signal mean determination circuit that receives G samples from the digital baseband signal and determines an amplitude mean value associated with the amplitude modulated symbol stream; and B) a correlation circuit that detects the preamble.
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申请公布号 |
US7035352(B1) |
申请公布日期 |
2006.04.25 |
申请号 |
US20010999633 |
申请日期 |
2001.10.24 |
申请人 |
NATIONAL SEMICONDUCTOR CORPORATION |
发明人 |
MALONE LAWRENCE J.;LAMB AARON D. |
分类号 |
H04L27/14 |
主分类号 |
H04L27/14 |
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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