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A sine wave, sinusoidal wave, or sinusoid (symbol: ∿) is a periodic wave whose waveform (shape) is the trigonometric sine function. In mechanics , as a linear motion over time, this is simple harmonic motion ; as rotation , it corresponds to uniform circular motion .
In QAM, an in-phase signal (or I, with one example being a cosine waveform) and a quadrature phase signal (or Q, with an example being a sine wave) are amplitude modulated with a finite number of amplitudes and then summed. It can be seen as a two-channel system, each channel using ASK.
A full-wave rectified sine wave, shown in minimal form so that it is useful for small thumbnails, as in Crest factor i The source code of this SVG is valid . This plot was created with Gnuplot by v.
A sine wave, shown in minimal form so that it is useful for small thumbnails, as in Crest factor: Created by User:Omegatron using gnuplot, possibly with post-processing in the GIMP (PNG) or Inkscape (SVG)
English: This shows several waveforms: sine wave, square wave, triangle wave, and rising sawtooth wave. The fundamental frequencies of each waveform have the same frequency and phase, for comparison. Uses the data files and the gnuplot code in #Source code below.
A modulated wave resulting from adding two sine waves of identical amplitude and nearly identical wavelength and frequency. A common situation resulting in an envelope function in both space x and time t is the superposition of two waves of almost the same wavelength and frequency: [2]
The following other wikis use this file: Usage on bn.wikipedia.org সাইন তরঙ্গ; Usage on bs.wikipedia.org Sinusoida; Usage on ca.wikipedia.org
For a sine wave modulation, the modulation index is seen to be the ratio of the peak frequency deviation of the carrier wave to the frequency of the modulating sine wave. If h ≪ 1 {\displaystyle h\ll 1} , the modulation is called narrowband FM (NFM), and its bandwidth is approximately 2 f m {\displaystyle 2f_{m}\,} .