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Modulation is the process of converting data into electrical signals optimized for transmission. Modulation techniques are roughly divided into four types: Analog modulation, Digital modulation, Pulse modulation , and Spread spectrum method.
Analog modulation is typically used for AM, FM radio, and short-wave broadcasting.
Digital modulation involves transmission of binary signals (0 and 1).
This method is divided into single carrier modulation, by which the carrier occupies the entire bandwidth (i.e. amplitude, frequency, and phase), and a multicarrier scheme that modulates and transmits different data on multiple carriers.
In addition, there is a pulse modulation technique used to change the pulse width and spread spectrum method that spreads the signal energy over a wide band.
In wireless communication, information is transmitted by encoding voice and data on radio waves of certain frequencies.
This section outlines the modulation methods adopted by ROHM's short-range wireless lineup.
A digital modulation method that sends transmission data by varying the presence/absence of analog signals.
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