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  2. Frequency-resolved optical gating - Wikipedia

    en.wikipedia.org/wiki/Frequency-resolved_optical...

    Frequency-resolved optical gating (FROG) is a general method for measuring the spectral phase of ultrashort laser pulses, which range from subfemtosecond to about a nanosecond in length. Invented in 1991 by Rick Trebino and Daniel J. Kane, FROG was the first technique to solve this problem, which is difficult because, ordinarily, to measure an ...

  3. Double-blind frequency-resolved optical gating - Wikipedia

    en.wikipedia.org/wiki/Double-blind_frequency...

    Double-blind frequency-resolved optical gating (double-blind FROG) is a method for simultaneously measuring two unknown ultrashort laser pulses. Well established ultrafast measurement techniques such as frequency-resolved optical gating and its simplified version GRENOUILLE can only measure one unknown ultrashort laser pulse at a time.

  4. RFM (market research) - Wikipedia

    en.wikipedia.org/wiki/RFM_(market_research)

    RFM-I – Recency, Frequency, Monetary Value – Interactions is a version of RFM framework modified to account for recency and frequency of marketing interactions with the client (e.g. to control for possible deterring effects of very frequent advertising engagements).

  5. Frequency (marketing) - Wikipedia

    en.wikipedia.org/wiki/Frequency_(marketing)

    In marketing and advertising, frequency refers to the number of times a target audience is exposed to a particular message or advertisement within a given time frame. [1] This concept is a fundamental element of marketing communication strategies, aiming to enhance brand recall, create awareness, and influence consumer behavior through repeated ...

  6. Radio resource management - Wikipedia

    en.wikipedia.org/wiki/Radio_Resource_Management

    Dynamic RRM schemes adaptively adjust the radio network parameters to the traffic load, user positions, user mobility, quality of service requirements, base station density, etc. Dynamic RRM schemes are considered in the design of wireless systems, in view to minimize expensive manual cell planning and achieve "tighter" frequency reuse patterns, resulting in improved system spectral efficiency.

  7. Gating - Wikipedia

    en.wikipedia.org/wiki/Gating

    Gating system metalwork, a process in casting; Gating signal, a signal that provides a time window; Clock gating, a power-saving techniques used in synchronous circuits; Power gating, a power-saving technique for circuits; Noise gate, a term in audio signal processing; Frequency-resolved optical gating, a term related to auto correlation in optics

  8. Spread spectrum - Wikipedia

    en.wikipedia.org/wiki/Spread_spectrum

    Techniques known since the 1940s and used in military communication systems since the 1950s "spread" a radio signal over a wide frequency range several magnitudes higher than minimum requirement. The core principle of spread spectrum is the use of noise-like carrier waves, and, as the name implies, bandwidths much wider than that required for ...

  9. Rectangular function - Wikipedia

    en.wikipedia.org/wiki/Rectangular_function

    Plot of normalized ⁡ function (i.e. ⁡ ()) with its spectral frequency components.. The unitary Fourier transforms of the rectangular function are [2] ⁡ = ⁡ = ⁡ (), using ordinary frequency f, where is the normalized form [10] of the sinc function and ⁡ = ⁡ (/) / = ⁡ (/), using angular frequency , where is the unnormalized form of the sinc function.

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