8

Correlation

Correlation methods using a PC

In the detection of small signals, noise is the limiting factor. There are four principal methods of recovering signals in the presence of noise. These are:

Listing 8.8

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(1) Filtering

(2) Averaging

(3) Correlation

(4) Coding

As high-performance instrumentation systems have become available, increasing interest has been expressed in correlation methods. Although autocorrelation is an interesting signal-processing operation in its own right, it remains an abstraction. It is preferable to identify a practical problem. This should provoke further discussion and illustrate the principles of this ...

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