Modulationsspektrum

Modulationsspektrum refers to the range of frequencies occupied by a modulated signal. When a carrier wave is modulated by a message signal, its frequency content changes. The original carrier wave exists at a specific frequency, but the modulation process introduces new frequencies, typically in the form of sidebands. The modulationsspektrum encompasses the carrier frequency and these sidebands. The width of this spectrum, known as bandwidth, is a crucial characteristic of the modulated signal and is influenced by the type of modulation employed and the bandwidth of the message signal itself. For example, Amplitude Modulation (AM) typically creates two sidebands, while Frequency Modulation (FM) can create a wider range of sidebands depending on the modulation index and message signal bandwidth. Understanding the modulationsspektrum is essential for designing communication systems, allocating radio frequencies, and avoiding interference between different signals. Different modulation schemes have different spectral efficiencies, meaning how effectively they utilize the available bandwidth to transmit information.