Multiplexed Binary Offset Carrier
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Multiplexed binary offset carrier (MBOC) modulationNavipedia information on MBCO Modulation
/ref>Galileo Open Service Signal In Space Interface Control Document (OS SIS ICD)
, GSA, Issue 1.1, September 2010 is a modulation design proposed for
Galileo Galileo di Vincenzo Bonaiuti de' Galilei (15 February 1564 – 8 January 1642) was an Italian astronomer, physicist and engineer, sometimes described as a polymath. Commonly referred to as Galileo, his name was pronounced (, ). He was ...
and modernized
GPS The Global Positioning System (GPS), originally Navstar GPS, is a Radionavigation-satellite service, satellite-based radionavigation system owned by the United States government and operated by the United States Space Force. It is one of t ...
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, o ...
(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 \Phi(f) is defined byAgreement06
 : \Phi(f) = \fracBOC(1,1)+\fracBOC(6,1) 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 Galileo di Vincenzo Bonaiuti de' Galilei (15 February 1564 – 8 January 1642) was an Italian astronomer, physicist and engineer, sometimes described as a polymath. Commonly referred to as Galileo, his name was pronounced (, ). He was ...
, and the Time-Multiplexed Binary Offset Carrier (TMBOC), currently used in the modernized
GPS The Global Positioning System (GPS), originally Navstar GPS, is a Radionavigation-satellite service, satellite-based radionavigation system owned by the United States government and operated by the United States Space Force. It is one of t ...
L1C signal.


References

{{refend Quantized radio modulation modes de:Binary Offset Carrier#Multiplexed Binary Offset Carrier