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2. In-phase and quadrature components - Wikipedia

   en.wikipedia.org/wiki/In-phase_and_quadrature...

   I(t) and Q(t) are the time-series data for the in-phase and quadrature components. S is the signal IQ data has extensive use in many signal processing contexts, including for radio modulation , software-defined radio , audio signal processing and electrical engineering .

3. Intelligence quotient - Wikipedia

   en.wikipedia.org/wiki/Intelligence_quotient

   An intelligence quotient (IQ) is a total score derived from a set of standardized tests or subtests designed to assess human intelligence. [1] Originally, IQ was a score obtained by dividing a person's mental age score, obtained by administering an intelligence test, by the person's chronological age, both expressed in terms of years and months.

4. IQ imbalance - Wikipedia

   en.wikipedia.org/wiki/IQ_imbalance

   IQ imbalance is a performance-limiting issue in the design of a class of radio receivers known as direct conversion receivers. [a] These translate the received radio frequency (RF, or pass-band) signal directly from the carrier frequency to baseband using a single mixing stage.

5. YIQ - Wikipedia

   en.wikipedia.org/wiki/YIQ

   Note that the I and Q chroma coordinates are scaled up to 1.0. See the formulae below in the article to get the right bounds. An image along with its Y, I, and Q components. YIQ is the color space used by the analog NTSC color TV system. I stands for in-phase, while Q stands for quadrature, referring to the components used in quadrature ...

6. Constellation diagram - Wikipedia

   en.wikipedia.org/wiki/Constellation_diagram

   Thus each symbol can be represented by a complex number, and the constellation diagram can be regarded as a complex plane, with the horizontal real axis representing the I component and the vertical imaginary axis representing the Q component. A coherent detector is able to independently demodulate these carriers.

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