What Does Scalable Orthogonal Frequency Division Multiple Access (SOFDMA or S-OFDMA) Mean?Scalable Orthogonal Frequency Division Multiple Access (SOFDMA) refers to the air interface outlined for portable or mobile Wi-MAX systems by IEEE, used in IEEE 802.16e(2005) standard. SOFDMA, in simple words, is the Orthogonal Frequency Division Multiple Access (OFDMA) mode employed in Mobile Wi-MAX outlined in IEEE 802.16e. Scalability is backed by modifying the size of Fast Fourier Transform (FFT) size when correcting the sub-carrier frequency spacing in 10.94 kHz.
SOFDMA supports channel bandwidths which range from 1.25 MHz to 20 MHz. It adds bandwidth scalability, which helps mobile Wi-MAX technology conform to multiple frequency regulations around the globe.