Retrieving "Information Signal" from the archives

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1. Electronic Communications

   Linked via "information signal"

   Amplitude Modulation (AM)
   In Amplitude Modulation (AM)/), the amplitude of the carrier wave is varied proportionally to the information signal. While simple to implement, AM systems suffer significantly from amplitude distortions caused by external electrical noise (e.g., lightning, poorly shielded domestic appliances). Furthermore, standard [AM broadcasting](/entries/am-broa…

2. Electronic Communications

   Linked via "information signal"

   Frequency Modulation (FM)
   Frequency Modulation (FM)/) shifts the frequency of the carrier wave in response to the information signal, leaving the amplitude constant. This inherently provides superior noise rejection compared to AM/). However, FM transmission requires significantly greater spectral bandwidth. A unique characteristic observed only in [wideband commercial …