Frequency Division Multiple Access (FDMA) is a channel access method used in communication systems. It divides the available frequency spectrum into distinct frequency bands, allowing multiple users to transmit simultaneously without interference. Each user is assigned a specific frequency band for their communication, ensuring that their signals do not overlap. FDMA is commonly used in various applications, including mobile phone networks and satellite communications. By allocating separate frequency channels, FDMA enables efficient use of the available bandwidth, facilitating clear and reliable communication among multiple users in a shared environment.