Mehrträgerbasierte

Mehrträgerbasierte, often translated as multi-carrier based, refers to a family of communication techniques that transmit data by dividing it into multiple sub-carriers. Instead of sending a single high-frequency signal, the data stream is split and modulated onto numerous lower-frequency carriers. This approach is central to modern wireless communication standards.

The primary benefit of mehrträgerbasierte techniques is their robustness against frequency-selective fading, a phenomenon common in wireless channels where different frequencies experience different levels of attenuation. By spreading the data across many carriers, the system is less susceptible to the complete loss of signal quality if one or a few carriers are severely affected. This redundancy significantly improves reliability.

Orthogonal frequency-division multiplexing (OFDM) is the most well-known and widely implemented mehrträgerbasierte scheme. In OFDM, the sub-carriers are orthogonal to each other, meaning they do not interfere with one another even though they are closely spaced. This orthogonality allows for efficient spectral utilization. Another related concept is discrete multi-tone (DMT), which is essentially OFDM used in applications like digital subscriber line (DSL) technology.

Mehrträgerbasierte systems are fundamental to technologies such as Wi-Fi, 4G LTE, and 5G mobile networks, as well as various digital broadcasting systems. Their ability to efficiently and reliably transmit large amounts of data over challenging wireless environments makes them a cornerstone of modern digital communication.