Cumulative Distribution Function. The probability distribution of a variable. For every value of the variable, the cdf is the probability that the variable takes on a value less than or equal to some fixed value. Important in analysis of performance in analogue transmission systems and of the effectiveness of spread spectrum modulation techniques such as CDMA.
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cumulative distribution function. This function describes a statistical distribution. It has the value, at each possible outcome, of the probability of receiving that outcome or a lower one. A cdf is usually denoted in capital letters. Consider for example some F(x), with x a real number is the probability of receiving a draw less than or equal to ... Found on http://www.econterms.com/glossary.cgi?query=cdf