OFDM stands for Orthogonal Frequency-Division Multiplexing, which is a type of digital transmission used in wireless communication systems. OFDM divides a single data stream into multiple sub-streams, each modulated by a different carrier frequency. These carrier frequencies are orthogonal to each other, meaning they do not interfere with each other. This allows OFDM to achieve high data rates and robustness against channel impairments, such as multipath fading and narrowband interference.
OFDM is widely used in many wireless standards, such as Wi-Fi, LTE, and 5G. OFDM can also be combined with other techniques, such as MIMO and beamforming, to further improve the performance and efficiency of wireless networks.