Negative Frequency
The concept of negative and positive frequency can be as simple as a wheel rotating one way or the other way. A signed value of frequency indicates both the rate and direction of rotation. The rate is expressed in units such as revolutions (aka cycles) per second (hertz) or radian/second (where 1 cycle corresponds to 2π radians).
Read more about Negative Frequency: Sinusoids, Complex Sinusoids, Sampling of Positive and Negative Frequencies and Aliasing, Negative Frequency As A Matched Filter For Positive Frequencies
Famous quotes containing the words negative and/or frequency:
“The idealist’s programme of political or economic reform may be impracticable, absurd, demonstrably ridiculous; but it can never be successfully opposed merely by pointing out that this is the case. A negative opposition cannot be wholly effectual: there must be a competing idealism; something must be offered that is not only less objectionable but more desirable.”
—Charles Horton Cooley (1864–1929)
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—Rebecca West (1892–1983)