Which Wi-Fi standard uses OFDMA as its transmission method?

The Wi-Fi standard that uses Orthogonal Frequency Division Multiple Access (OFDMA) as its transmission method is 802.11ax. OFDMA is a key feature introduced in this standard, which enhances network efficiency and performance, especially in environments with multiple users and devices.

With OFDMA, the available bandwidth is divided into smaller subcarriers that can be assigned to different users simultaneously. This means that multiple devices can transmit and receive data concurrently, reducing latency and improving throughput. This technology is particularly beneficial in dense environments, such as offices or public places, where many devices are accessing the network simultaneously.

In contrast, the earlier standards like 802.11b, 802.11n, and 802.11a do not utilize OFDMA. These standards rely on different methods for managing bandwidth and concurrent connections, which can lead to decreased efficiency as the number of connected devices increases. Thus, 802.11ax stands out due to its use of OFDMA, providing superior performance and user experience in modern wireless networking.