Glossary

VSF-Spread OFDM

Variable Spreading Factor Spread Orthogonal Frequency Digital Multiplexing. A wireless access system used in signal transmission, where the spreading factor is controlled variably to achieve optimum quality and speed according to call conditions. NTT DOCOMO has achieved 1Gbit/s real-time packet signal transmission by using this method and "MIMO multiplexing" (MIMO: Multiple-Input Multiple-Output) in 4G communication technology experiments.