Multiplexed binary offset carrier (MBOC) modulation
[Navipedia information on MBCO Modulation](_blank)
/ref>[Galileo Open Service Signal In Space Interface Control Document (OS SIS ICD)](_blank)
, GSA, Issue 1.1, September 2010 is a modulation design proposed for Galileo and modernized GPS
The Global Positioning System (GPS), originally Navstar GPS, is a satellite-based radionavigation system owned by the United States government and operated by the United States Space Force. It is one of the global navigation satellite sy ...
satellite navigation signals, which combines a sine binary offset carrier
Binary offset carrier modulation (BOC modulation) was developed by John Betz in order to allow interoperability of satellite navigation systems. It is currently used in the US GPS system, Indian IRNSS system and in Galileo and is a square sub-car ...
SinBOC(1,1) signal with a SinBOC(6,1) signal, either via weighted sum/difference (the CBOC implementation) or via time-multiplexing (the TMBOC implementation).
The main objective of the common GPS and Galileo signal design activity was that the power spectral density
The power spectrum S_(f) of a time series x(t) describes the distribution of power into frequency components composing that signal. According to Fourier analysis, any physical signal can be decomposed into a number of discrete frequencies, ...
(PSD) of the proposed solution would be identical for GPS L1C and Galileo E1 OS signals when the pilot and data components are computed together. This assures high interoperability between both signals. Its power spectral density is defined byAgreement06
:
MBOC has two main implementations, the
Composite Binary Offset Carrier
The Composite Binary Offset Carrier (CBOC) modulation is a particular implementation of the Multiplexed Binary Offset Carrier modulation and it is nowadays used by Galileo satellite signals. It is formed by addition or subtraction of two weight ...
(CBOC) implementation, currently used in
Galileo, and the Time-Multiplexed Binary Offset Carrier (TMBOC), currently used in the modernized
GPS
The Global Positioning System (GPS), originally Navstar GPS, is a satellite-based radionavigation system owned by the United States government and operated by the United States Space Force. It is one of the global navigation satellite sy ...
L1C signal.
References
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Quantized radio modulation modes
de:Binary Offset Carrier#Multiplexed Binary Offset Carrier