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periodic signal

См. также в других словарях:

  • signal averaging — a method for minimizing noise interference in a periodic signal; the relative constancy of the signal intensity over time versus the randomness of noise is exploited by averaging the waveforms over a number of periods …   Medical dictionary

  • Periodic function — Not to be confused with periodic mapping, a mapping whose nth iterate is the identity (see periodic point). In mathematics, a periodic function is a function that repeats its values in regular intervals or periods. The most important examples are …   Wikipedia

  • Signal transduction — In biology, signal transduction refers to any process by which a cell converts one kind of signal or stimulus into another. Most processes of signal transduction involve ordered sequences of biochemical reactions inside the cell, which are… …   Wikipedia

  • Signal-to-noise ratio — For signal to noise ratio in statistics, see Cohen s d. Signal to noise ratio (often abbreviated SNR or S/N) is a measure used in science and engineering that compares the level of a desired signal to the level of background noise. It is defined… …   Wikipedia

  • Normalized frequency (digital signal processing) — In digital signal processing, the normalized frequency of a periodic signal is its frequency expressed in units of cycles (or radians) per sample, rather than in the usual SI units of hertz (cycles per second). The cycles per sample frequency is… …   Wikipedia

  • Sampling (signal processing) — Signal sampling representation. The continuous signal is represented with a green color whereas the discrete samples are in blue. In signal processing, sampling is the reduction of a continuous signal to a discrete signal. A common example is the …   Wikipedia

  • Digital signal processing — (DSP) is concerned with the representation of discrete time signals by a sequence of numbers or symbols and the processing of these signals. Digital signal processing and analog signal processing are subfields of signal processing. DSP includes… …   Wikipedia

  • Wow! signal — The WOW! Signal. The Wow! signal was a strong narrowband radio signal detected by Dr. Jerry R. Ehman on August 15, 1977, while working on a SETI project at the Big Ear radio telescope of The Ohio State University then located at Ohio Wesleyan… …   Wikipedia

  • Wow!-Signal — Bild 1 Scan des namensgebenden Dokuments von Jerry R. Ehman Das Wow! Signal war ein Schmalband Radiosignal, das der Astrophysiker Jerry R. Ehman im Rahmen eines SETI Projekts am „Big Ear“ Radioteleskop der Ohio State University am 15. August 1977 …   Deutsch Wikipedia

  • Wow-Signal — Scan des namensgebenden Dokuments von Jerry R. Ehman Das so genannte Wow Signal war ein Schmalband Radiosignal, das der Astrophysiker Jerry R. Ehman im Rahmen eines SETI Projekts am „Big Ear“ Radioteleskop der Ohio State University am 15. August …   Deutsch Wikipedia

  • Permanent signal — (PS) in US telephony jargon, or Permanent Loop in British usage, is a condition in which a POTS line is off hook without connection for an extended period of time. This is indicated in modern switches by the silent termination after the off hook… …   Wikipedia

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