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Detector for detecting a frequency-shift keying signal by digital processing
Detector for detecting a frequency-shift keying signal by digital processing
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机译:通过数字处理检测频移键控信号的检测器
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摘要
A frequency-shift keying (FSK) signal detector includes a binarizing circuit for receiving an FSK signal and expressing amplitude of the FSK signal in binary; a correlator for receiving the FSK signal expressed in binary and acquiring a correlation of the FSK signal; and an arithmetic unit for performing an arithmetic operation on the output of the correlator to detect and output the FSK signal. The correlator includes plural stages of shift register for sequentially shifting the FSK signal in response to a clock signal; a correlation filter for obtaining the correlation by a correlation signal sequence and a window function signal sequence which obtain a correlation value at one of two frequency components generated by frequency-shift keying; and another correlation filter for obtaining the correlation by a correlation signal sequence and a window function signal sequence which obtain a correlation value at the other of the two frequency components.
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