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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
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Space modulation is a radio amplitude modulation technique used in instrument landing systems (ILS) that incorporates the use of multiple antennas fed with various radio frequency powers and phases to create different depths of modulation within various volumes of three-dimensional airspace. This modulation method differs from internal modulation methods inside most other radio transmitters in that the phases and powers of the two individual signals mix within airspace, rather than in a modulator.
An aircraft with an on-board ILS receiver within the capture area of an ILS, (glideslope and localizer range), will detect varying depths of modulation according to the aircraft's position within that airspace, providing accurate positional information about the progress to the threshold.
Spacemodulation is a radio amplitude modulation technique used in instrument landing systems (ILS) that incorporates the use of multiple antennas fed...
modulated carrier is transmitted through space as a radio wave to a radio receiver. Another purpose of modulation is to transmit multiple channels of information...
Modulationspaces are a family of Banach spaces defined by the behavior of the short-time Fourier transform with respect to a test function from the Schwartz...
Orthogonal Time Frequency Space (OTFS) is a 2D modulation technique that transforms the information carried in the Delay-Doppler coordinate system. The...
Space vector modulation (SVM) is an algorithm for the control of pulse-width modulation (PWM), invented by Gerhard Pfaff, Alois Weschta, and Albert Wick...
deflection. A modulation depth comparison navigational aid (MDCNA), also known as an instrument landing system uses the concept of spacemodulation to provide...
Quadrature amplitude modulation (QAM) is the name of a family of digital modulation methods and a related family of analog modulation methods widely used...
Amplitude modulation (AM) is a modulation technique used in electronic communication, most commonly for transmitting messages with a radio wave. In amplitude...
Frequency modulation (FM) is the encoding of information in a carrier wave by varying the instantaneous frequency of the wave. The technology is used in...
Eight-to-fourteen modulation (EFM), used in compact discs Hamming code Hybrid ternary code Manchester code and differential Manchester Mark and space MLT-3 encoding...
information is transmitted across space by radio waves. At the sending end, the information, in the form of a modulation signal, is applied to an electronic...
low-energy galactic cosmic rays, with this modulation effect peaking during solar maximum. The volume of interplanetary space is a nearly total vacuum, with a mean...
Spatial modulation is a technique that enables modulation over space, across different antennas (radio) at a transmitter. Unlike multiple-input and multiple-output...
Delta modulation (DM or Δ-modulation) is an analog-to-digital and digital-to-analog signal conversion technique used for transmission of voice information...
The Modulation sphere or M-space formulation is a scheme or theory representing the system of effects of phase modulation and amplitude modulation as applied...
networks. Cohere holds the patents for the Orthogonal Time Frequency Space (OTFS) 2D modulation technique used to improve the performance of 4G and 5G networks...
In music, metric modulation is a change in pulse rate (tempo) and/or pulse grouping (subdivision) which is derived from a note value or grouping heard...
National Aeronautics and Space Administration (NASA) as part of the Space Shuttle program. Its official program name was Space Transportation System (STS)...
phase modulation (CPM) is a method for modulation of data commonly used in wireless modems. In contrast to other coherent digital phase modulation techniques...
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