Orthogonal Frequency-Division Multiple Access

Orthogonal Frequency-Division Multiple Access (OFDMA) is a multi-user version of the popular digital modulation scheme known as Orthogonal Frequency Division Multiplexing (OFDM). It is an advanced modulation technique used in telecommunications, allowing for the simultaneous transmission of multiple signals. In OFDMA, the available bandwidth is divided into many narrowband sub-channels, each utilised by a different user. This division is done orthogonally, meaning the sub-channels do not interfere with each other. This results in efficient use of the available bandwidth, minimising interference and maximising data throughput. OFDMA is particularly effective in handling high data rate applications that are sensitive to delay, such as video streaming or online gaming. It is also robust against multi-path fading, a common issue in wireless communication. This technology is utilised in various wireless and broadband standards, including 4G, 5G, and the latest Wi-Fi standards.