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  2. Time domain - Wikipedia

    en.wikipedia.org/wiki/Time_domain

    In the time domain, the signal or function's value is known for all real numbers, for the case of continuous time, or at various separate instants in the case of discrete time. An oscilloscope is a tool commonly used to visualize real-world signals in the time domain. A time-domain graph shows how a signal changes with time, whereas a frequency ...

  3. Discrete-time Fourier transform - Wikipedia

    en.wikipedia.org/wiki/Discrete-time_Fourier...

    In mathematics, the discrete-time Fourier transform (DTFT) is a form of Fourier analysis that is applicable to a sequence of discrete values. The DTFT is often used to analyze samples of a continuous function. The term discrete-time refers to the fact that the transform operates on discrete data, often samples whose interval has units of time.

  4. Frequency domain - Wikipedia

    en.wikipedia.org/wiki/Frequency_domain

    One of the main reasons for using a frequency-domain representation of a problem is to simplify the mathematical analysis. For mathematical systems governed by linear differential equations, a very important class of systems with many real-world applications, converting the description of the system from the time domain to a frequency domain converts the differential equations to algebraic ...

  5. Phase (waves) - Wikipedia

    en.wikipedia.org/wiki/Phase_(waves)

    In the adjacent image, the top sine signal is the test frequency, and the bottom sine signal represents a signal from the reference. If the two frequencies were exactly the same, their phase relationship would not change and both would appear to be stationary on the oscilloscope display.

  6. Walsh function - Wikipedia

    en.wikipedia.org/wiki/Walsh_function

    In mathematics, more specifically in harmonic analysis, Walsh functions form a complete orthogonal set of functions that can be used to represent any discrete function—just like trigonometric functions can be used to represent any continuous function in Fourier analysis. [1]

  7. 'Embarrassing': The Lakers have lost their last 2 games by a ...

    www.aol.com/embarrassing-lakers-lost-last-2...

    Add it up, and it's the worst two-game stretch in Los Angeles Lakers history. The Lakers lost to the Heat 134-93 on Wednesday, that loss coming two days after a 109-80 loss to the Timberwolves.

  8. Goertzel algorithm - Wikipedia

    en.wikipedia.org/wiki/Goertzel_algorithm

    The Goertzel algorithm is a technique in digital signal processing (DSP) for efficient evaluation of the individual terms of the discrete Fourier transform (DFT). It is useful in certain practical applications, such as recognition of dual-tone multi-frequency signaling (DTMF) tones produced by the push buttons of the keypad of a traditional analog telephone.

  9. At least 2 dead after severe weather moved through ...

    www.aol.com/coast-coast-storms-could-bring...

    At least two people have died as severe storms and tornadoes tore through parts of Texas and Mississippi on Saturday, officials said, while a parade of atmospheric river-fueled storms batters the ...

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