spreading factor
Technical term used in computing and telecommunications to describe the ratio of the bandwidth of a spread-spectrum signal to the information rate.
CDMA通信では拡散率が高いほど耐干渉性が向上する。
In CDMA communication, a higher spreading factor improves interference resistance.
Compound of 拡散 (kakusan, 'diffusion, spread') and 率 (ritsu, 'rate, factor').