the correspondence of a set of frequencies with the set of categories, intervals, or values into which a population is classified.
(statistics) the function of the distribution of a sample corresponding to the probability density function of the underlying population and tending to it as the sample size increases, the set of relative frequencies of sample points falling within given intervals of the range of the random variable
A range of conditions, often represented in graph form, in which each item is paired with the number of observed events or measurements meeting those conditions. For example, a list of price ranges paired with the number of cars available in each price range is a frequency distribution. Frequency distributions are commonly used in statistical analysis.
- Frequency division multiple access
frequency division multiplexing
- Frequency-division multiplex
noun 1. See multiplex (sense 1)
- Frequency division multiplexing
communications (FDM) The simultaneous transmission of multiple separate signals through a shared medium (such as a wire, optical fibre, or light beam) by modulating, at the transmitter, the separate signals into separable frequency bands, and adding those results linearly either before transmission or within the medium. While thus combined, all the signals may be amplified, […]
- Frequency-hopping spread spectrum
communications (FH, FHSS) A variation of spread spectrum communications in which a sequence of pseudo random numbers control a frequency synthesizer, generating different carrier frequencies that “hop around” in the desired frequency range. The receiver tunes to the same sequence of carrier frequencies in synchronisation with the transmitter. Frequency hopping spread spectrum was invented by […]