Direct-Sequence Spread Spectrum/ DSSS

Definition

DSSS spreads a signal over a wide bandwidth by multiplying it with a chip sequence at a much higher rate than the data. The resulting signal has low spectral density and is hard to detect or jam without the spreading code. DSSS underpins GPS, CDMA, and several tactical AJ waveforms.

Reference attributes

Class

Spread spectrum

Reference systems

GPS, Link 16 (hybrid)

Related terms

• Frequency-Hopping Spread Spectrum (FHSS)
  Spread-spectrum technique that rapidly changes carrier frequency over a wide band.
• Anti-Jam Techniques (AJ)
  Waveform and protocol techniques that preserve link integrity under deliberate jamming.