The full form of FHSS is Frequency Hopping Spread Spectrum.
FHSS is a transmission technology used in telecommunications. The reference defines it as:
- Frequency Hopping Spread Spectrum (FHSS) is a transmission technology in which the data signal is modulated by a narrowband carrier signal which changes frequency ("hops") over a wide band of frequencies. The hopping seems random but is prescribed by an algorithm known to the receiving system.
In essence, FHSS avoids interference and eavesdropping by rapidly switching the carrier frequency of a radio signal across many different frequencies. This "hopping" appears random but is actually a pre-defined sequence known to both the transmitter and receiver.