What is Spread Spectrum Transmission?
To prevent interference between wireless spectrums, rules prevent an RF an RF device from transmitting too great a signal over any one frequency. A spread spectrum transmitter spreads that signal throughout the frequency band permitting higher signal power. Two methods of spread spectrum transmission are used, Frequency Hopping (FHSS) and Direct Sequence (DSSS). A frequency hopping transmitter transmits briefly at one frequency before jumping to another frequency and resuming transmission. 25 or more unique channels are typically used to spread the signal power. A direct sequence transmitter replaces the data with a pseudo random data string which spreads the signal across the available frequency band.
Related Questions
- Weve been using direct sequence spread spectrum for data transmission. How does algorithmic frequency hopping compare to direct sequece, and how does it work?
- Weve been using frequency hopping spread spectrum (FHSS) for data transmission. How does direct sequence spread spectrum (DSSS) compare to FHSS?
- What is Spread Spectrum Transmission?
