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    Briefly describe weak signal processing techniques?


    Weak signal processing technology is mainly to solve the problem of detection, noise reduction and separation of signals with noise.In people’s daily life, noise interference is everywhere. It often coexists with useful signals, and it is difficult to separate them by ordinary methods, which seriously affects the operation of the system and the normal monitoring of target signals.In some current scientific research and engineering practice, we often encounter a very noisy situation, that is, the problem of detecting weak signals (on the order of nanovolts) in noise, which undoubtedly increases the difficulty of signal detection.Therefore, weak signals mainly refer to small amplitude signals that are submerged by strong noise. The purpose of weak signal detection is to extract useful signals from strong noise, or to use some new techniques and new methods to improve the signal-to-noise ratio of the output signals of the detection system.


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