Scalable Orthogonal Frequency Division Multiple Access (SOFDMA or S-OFDMA)
Definition - What does Scalable Orthogonal Frequency Division Multiple Access (SOFDMA or S-OFDMA) mean?
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.
Techopedia explains Scalable Orthogonal Frequency Division Multiple Access (SOFDMA or S-OFDMA)
Basic principles of SOFDMA
- The sub-carrier spacing does not depend on bandwidth
- The volume of sub-carriers scales with bandwidth
- The smallest unit of bandwidth allocation, depending on the idea of sub-channels, is fixed and bandwidth independent
- The volume of sub-channels scales with bandwidth, and the ability of every individual sub-channel remains constant
- Advanced Modulation and Coding (AMC)
- Multiple-Input-Multiple-Output (MIMO) in DL and UL
- High-efficiency uplink sub-channel structures
- Hybrid Automatic Repeat Request (H-ARQ)
- Other default features including a range of sub-carriers allocation in addition to diversity schemes.
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