OFDMTechniken

OFDMTechniken refers to Orthogonal Frequency-Division Multiplexing techniques. OFDM is a digital modulation method that divides a high-rate data stream into multiple lower-rate streams. Each of these lower-rate streams is then transmitted simultaneously over a subset of orthogonal subcarriers. Orthogonality ensures that the subcarriers do not interfere with each other, even though they are closely spaced. This allows for efficient use of the available frequency spectrum.

A key advantage of OFDMTechniken is their robustness against frequency-selective fading, which is common in wireless communication channels. By dividing the data into parallel streams on narrow subcarriers, each subcarrier experiences a relatively flat fading profile, making it easier to equalize. Furthermore, OFDM can effectively combat intersymbol interference (ISI) by using a cyclic prefix, which is a copy of the end of each symbol appended to its beginning.

OFDMTechniken are widely used in modern communication systems. Notable examples include Digital Video Broadcasting (DVB), Wi-Fi standards such as 802.11a, g, n, and ac, and cellular technologies like 4G LTE and 5G. The ability to achieve high data rates and reliable transmission in challenging environments makes OFDM a fundamental technology in today's wireless world.