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The main objective of the common GPS and Galileo signal design activity was that the [[power spectral density]] (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.<ref name="NAVIPEDIA_MBOC"/> This assures high interoperability between both signals. Its power spectral density <math>\Phi(f)</math> is defined by<ref>[http://www.losangeles.af.mil/shared/media/document/AFD-070803-061.pdf Agreement06] {{webarchive|url=https://web.archive.org/web/20110725125416/http://www.losangeles.af.mil/shared/media/document/AFD-070803-061.pdf |date=2011-07-25 }}</ref>
: <math>\Phi(f) = \frac{10}{11}BOC(1,1)+\frac{1}{11}BOC(6,1)</math>
MBOC has two main implementations, the [[Composite Binary Offset Carrier]] (CBOC) implementation, currently used in [[Galileo (satellite navigation)|Galileo]], and the Time-Multiplexed Binary Offset Carrier (TMBOC), currently used in the modernized [[GPS]] L1C signal.
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