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'''Multiplexed binary offset carrier''' (MBOC) modulation <ref name="NAVIPEDIA_MBOC">[http://www.navipedia.org/index.php/MBOC_Modulation Navipedia information on MBCO Modulation]</ref><ref name="GAL_ICD">[http://ec.europa.eu/enterprise/policies/satnav/galileo/files/galileo-os-sis-icd-issue1-revision1_en.pdf Galileo Open Service Signal In Space Interface Control Document (OS SIS ICD)], GSA, Issue 1.1, September 2010</ref><ref>[Hoult, N.; Aguado, L. E. and Xia, P. MBOC and BOC(1,1) Performance Comparison. Journal of Navigation, Volume 61, No. 4, pp613–627, 2008 (NaviJournal08)]</ref> is a modulation proposed for Galileo <ref name="GAL_ICD"/> and modernized GPS signals, which combines a sine [[binary offset carrier]] 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 (PSD) of the proposed solution would be identical for GPS L1C and Galileo E1 OS 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
<math>\Phi(f)=\frac{10}{11}BOC(1,1)+\frac{1}{11}BOC(6,1)</math>
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