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
weighted
A weight function is a mathematical device used when performing a sum, integral, or average to give some elements more "weight" or influence on the result than other elements in the same set. The result of this application of a weight function is ...
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-carr ...
modulations. It has been introduced as an
MBOC variant, following an EU-US Agreement in 2004 on the Promotion, Provision and use of Galileo and GPS Satellite-Based Navigation Systems and Related Applications.
A CBOC
theoretical model
A theory is a systematic and rational form of abstract thinking about a phenomenon, or the conclusions derived from such thinking. It involves contemplative and logical reasoning, often supported by processes such as observation, experimentation, ...
ing can be found in.
[Lohan2010]
References
* E.S. Lohan, "Analytical performance of CBOC-modulated Galileo E1 signal using sine BOC(1,1) receiver for mass-market applications", in Proc. of ION-PLANS 2010, 3–5 May 2010, Palm Springs, CA (Lohan2010)
*O. Julien, C. Macabiau, L. Ries, J.-L. Issler, 1 - Bit processing of Composite BOC (CBOC) Signals, First CNES Workshop on Galileo Signals and Signal Processing, 12–13 October 2006, IAS ( Institut Aero Spatial ) Toulouse, France (Julien2006)
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Quantized radio modulation modes
Galileo (satellite navigation)