发明名称 |
Nonlinear-least squares based method and apparatus for FSK signal decoding |
摘要 |
Disclosed is a method and apparatus for receiving FSK signals using estimation theory. A received signal is filtered to obtain energy estimates for a first frequency corresponding to a binary "0" and a second frequency corresponding to a binary "1". The energy estimates are subtracted to obtain a difference value and an odd number of samples of a series of difference values is smooth filtered in order to produce a series of average values. A sliding window is applied to the series of average values that detects a clear majority of sample corresponding to either the binary "0" frequency or the binary "1" frequency in order to produce a binary output signal that corresponds to the received signal.
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申请公布号 |
US6785347(B1) |
申请公布日期 |
2004.08.31 |
申请号 |
US19990298498 |
申请日期 |
1999.04.22 |
申请人 |
3COM CORPORATION |
发明人 |
LIU ZHENG-SHE |
分类号 |
H04L27/148;(IPC1-7):H04L27/14 |
主分类号 |
H04L27/148 |
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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