Which FHSS overhead component is typically larger than any similar component in DSSS?

Which FHSS overhead component is typically larger than any similar component in DSSS?

• A. Preamble.
• B. The interframe spacing.
• C. Forward error correction.
• D. Synchronization header.

Answer: (B)

FHSS relies on rapid frequency hopping, so devices must pause between frames long enough to switch to the next channel and re-sense the medium. That waiting time shows up as interframe spacing, and it tends to be larger than similar gaps used in DSSS, where the channel stays on one frequency long enough and the preamble/PLCP handle synchronization. The preamble remains important for initial timing, and forward error correction adds fixed coding overhead, but they aren’t typically larger than the interframe timing required by hopping. A synchronization header helps with hop timing, yet the main extra overhead between frames in FHSS is the interframe spacing itself.

FHSS relies on rapid frequency hopping, so devices must pause between frames long enough to switch to the next channel and re-sense the medium. That waiting time shows up as interframe spacing, and it tends to be larger than similar gaps used in DSSS, where the channel stays on one frequency long enough and the preamble/PLCP handle synchronization. The preamble remains important for initial timing, and forward error correction adds fixed coding overhead, but they aren’t typically larger than the interframe timing required by hopping. A synchronization header helps with hop timing, yet the main extra overhead between frames in FHSS is the interframe spacing itself.