Abstract:With the evolution of digital technology, the digital
demodulation method has become widely employed in near-infrared
(NIR) spectrometers due to its advantages of reducing the volume,
enhancing the reliability, and increasing the flexibility of
instruments. However, digital demodulation has a lower
signal-to-noise ratio (SNR), which can be improved by lowering the
measurement precision, speed, and stability. To improve the SNR
without sacrificing the measurement speed or stability, an improved
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