Cover Image: May 2002 Scientific American Magazine See Inside

RADIO-SIGNAL TECHNICALITIES [Preview]

Narrowband and Wideband Modulation Schemes















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Image: JOHHNY JOHNSON

Conventional narrowband radio techniques rely on a base "carrier" wave that is altered in a systematic manner (modulated) to embody a coded bit stream. Carrier waves can be modified

to incorporate digital data by varying their amplitude, frequency


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