Modulation is the technique of varying a carrier signal's properties—such as amplitude, frequency, or phase—to encode and transmit data. This process allows the transmission of information over various mediums, including radio frequencies used in wireless communications.
Option A:Describes spread spectrum techniques, not modulation.
Option B:Is a partial description but lacks the specificity of how the carrier is modified.
Option D:Is a vague statement that doesn't accurately define modulation.
[Reference:CWDP-305 Study Guide, Chapter on RF Fundamentals – Modulation Techniques., , ]
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