Abstract
Leakage, a common phenomenon in digital Fast Fourier Analysis, is discussed. An analytical explanation of leakage is presented with examples used to illustrate the detrimental effects to accurate signal analysis. Through this development, it is shown that signal amplitude errors of more than 36% are possible as a result of leakage. Also, an analytical method to resolve the error introduced by leakage, and hence to obtain accurate signal information, is presented. In conjunction with this methodology examples are provided to demonstrate the improvement in signal amplitude and frequency estimation possible. Amplitude estimation errors of 14·4% are reduced to 1·5% in one example. Finally, charts for quick estimation of signal amplitude and frequency based on this analytical method are presented. For further illustration, examples of use of this method are also given.
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