Chirp Spread Spectrum iconA linear frequency modulated upchirp in the time domain. Other types of upchirps may increase exponentially over time.
Passband modulation
Analog modulation
AM
FM
PM
QAM
SM
SSB
Digital modulation
ASK
APSK
CPM
FSK
MFSK
MSK
OOK
PPM
PSK
QAM
SC-FDE
TCM
WDM
Hierarchical modulation
QAM
WDM
Spread spectrum
CSS
DSSS
FHSS
THSS
See also
Capacity-approaching codes
Demodulation
Line coding
Modem
AnM
PoM
PAM
PCM
PDM
PWM
ΔΣM
OFDM
FDM
Multiplexing
v
t
e
Multiplexing
Analog modulation
AM
FM
PM
QAM
SM
SSB
Circuit mode (constant bandwidth)
TDM
FDM / WDM
SDMA
Polarization
Spatial
OAM
Statistical multiplexing (variable bandwidth)
Packet switching
Dynamic TDMA
FHSS
DSSS
OFDMA
SC-FDM
MC-SS
Related topics
Channel access methods
Medium access control
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In digital communications, chirp spread spectrum (CSS) is a spread spectrum technique that uses wideband linear frequency modulated chirp pulses to encode information.[1] A chirp is a sinusoidal signal whose frequency increases or decreases over time (often with a polynomial expression for the relationship between time and frequency).
^IEEE Computer Society, (August 31, 2007). IEEE Standard 802.15.4a-2007. New York, NY: IEEE.
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