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<a accesskey="3" href="page.php?w=phase-shift_keying&amp;p=2">3.Next</a>
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<p><b>Phase-shift keying</b> (<b>PSK</b>) is a <a href="page.php?w=digital_modulation">digital modulation</a> process which conveys <a href="page.php?w=Data_%28computing%29">data</a> by changing (modulating) the <a href="page.php?w=Phase_%28waves%29">phase</a> of a constant <a href="page.php?w=frequency">frequency</a> <a href="page.php?w=carrier_wave">carrier wave</a>. The modulation is accomplished by varying the <a href="page.php?w=sine_wave">sine</a> and <a href="page.php?w=cosine_wave">cosine</a> inputs at a precise time. It is widely used for</p><p>
<a accesskey="3" href="page.php?w=phase-shift_keying&amp;p=2">3.Next</a>
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