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Types of signal processing

Transforms are important in signal processing. An important objective of signal processing is to improve the signal-to-noise ratio of a signal. This can be done in the time domain and in the frequency domain. Signals are composed of a deterministic part, which carries the chemical information and a stochastic or random part which is caused by deficiencies of the instmmentation, e.g. shot noise [Pg.509]

In this chapter we discuss techniques both for signal enhancement and signal restoration. Techniques to model or to reconstruct the deterministic part of a digital signal in the presence of noise are discussed in Chapter 41. [Pg.510]


The results in Table 12 are considered very conservative by the North American Rockwell authors, since they were not obtained under optimum conditions. Such conditions must take into account the.type of luggage, conveyor belt speed, detector size, type of signal process-... [Pg.383]

In time-resolved measurements with a step-scan FT-IR spectrometer (see Section 5.2.1.1 for description of a step-scan FT-IR spectrometer), the timing of the two types of signal processing described above is rendered compatible by scanning the movable mirror of the interferometer step by step and sampling the interferogram signals at each step [1,9]. The... [Pg.291]

For Doppler a different type of signal processing is used to assess the movement of blood. By comparing the signals from a series of perhaps ten pulses sent along the same direction, changes caused by a moving structure (typically red blood cells) can be extracted. The slower the flow the more pulses must be transmitted and this, as well as the fact that solid tissues also move, sets a limit to the sensitivity of Doppler. The... [Pg.6]

Signal processing in mechanical impedance analysis (MIA) pulse flaw detectors by means of cross correlation function (CCF) is described. Calculations are carried out for two types of signals, used in operation with single contact and twin contact probes. It is shown that thi.s processing can increase the sensitivity and signal to noise ratio. [Pg.827]

Electronic Controllers Almost all of the electronic process controllers used todav are microprocessor-based devices. These processor-based controllers contain, or have access to, inpuLoutput (I/O) interface electronics that allow various types of signals to enter and leave the controller s processor. The controller, depending on its type, uses sufficient read-only-memoiy (ROM) and read/write-accessible-memoiy (RAM) to perform the controller function. [Pg.775]

Since most electrode processes are non-linear, this requires the use low level signals for a linear analysis, and though all types of perturbation are equivalent from the viewpoint of signal processing, harmonic analysis provides the best compromise between the time of measurement and the accuracy [17],... [Pg.209]


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Process type

Processing types

Signal processing

Signal type

Signaling processes

Types of processes

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