sivubandeiden

Sivubandeiden refers to sidebands in radio transmission. In amplitude modulation (AM), the original audio signal is modulated onto a carrier wave. This process creates not only the original carrier frequency but also two sidebands, known as the upper sideband (USB) and the lower sideband (LSB). These sidebands contain the frequency components of the original audio signal.

The USB consists of frequencies higher than the carrier frequency, while the LSB consists of frequencies lower than the carrier frequency. For example, if a carrier wave of 1 MHz is modulated by an audio signal with a frequency of 1 kHz, the USB would be at 1 MHz + 1 kHz = 1.001 MHz, and the LSB would be at 1 MHz - 1 kHz = 999 kHz.

In standard AM broadcasting, both USB and LSB are transmitted along with the carrier. This results in a wider bandwidth than is strictly necessary to convey the audio information, as one of the sidebands is redundant. Single-sideband (SSB) modulation techniques are used in some applications to conserve bandwidth. In SSB, either the USB or the LSB is suppressed, transmitting only one of them along with the carrier or with no carrier at all (in the case of suppressed-carrier SSB). This significantly reduces the bandwidth required for transmission. Sivubandeiden are therefore a fundamental concept in understanding radio communication and modulation techniques.