v t e Spread spectrum in digital communications
Main articles	Spread spectrum Code-division multiple access (CDMA) History Hedy Lamarr Commercial use More...
Spread spectrum methods	Direct-sequence spread spectrum (DSSS) Frequency-hopping spread spectrum (FHSS) Chirp spread spectrum (CSS) Time-hopping spread spectrum (THSS)
CDMA schemes	W-CDMA TD-CDMA TD-SCDMA DS-CDMA FH-CDMA MC-CDMA
Major implementations	Space Network (NASA) GPS Galileo GLONASS Bluetooth Cordless phones: DECT Cellular EV-DO Mobile IS-95 (aka cdmaOne) CDMA2000 (aka IS-2000) Also Qualcomm Verizon
Major concepts	PN (pseudorandom noise) code Chip Near–far problem Power spectral density (PSD) Process gain Rake receiver Low probability of intercept
See also Digital communication Modulation Statistical multiplexing Waveform