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Statements

Subject Item
dbr:Phase-shift_keying
dbo:wikiPageWikiLink
dbr:Binary_offset_carrier_modulation
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dbr:GLONASS
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dbr:Binary_offset_carrier_modulation
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yago:Abstraction100002137 yago:WikicatQuantizedRadioModulationModes yago:Manner104928903 yago:Attribute100024264 yago:WikicatRadioModulationModes yago:Property104916342 owl:Thing
rdfs:label
Binary offset carrier modulation Binary Offset Carrier
rdfs:comment
Binary Offset Carrier (BOC) ist ein spezielles Kodierungsverfahren zur Frequenzspreizung mit Anwendungsbereichen in der digitalen Nachrichtentechnik beim so genannten Codemultiplex. Dabei werden mehrere zu übertragene Nutzdatenfolgen durch unterschiedliche pseudozufällige Codefolgen (PRN) unterschieden. BOC stellt eine spezielle Form von digitaler Modulationstechnik dar, die auch noch Teil von aktuellen Forschungsarbeiten ist. 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-carrier modulation, where a signal is multiplied by a rectangular sub-carrier of frequency equal to or greater than the chip rate. Following this sub-carrier multiplication, the spectrum of the signal is divided into two parts, therefore BOC modulation is also known as a split-spectrum modulation. Their major advantages are, that one can shape the spectrum to allow inter-system-compatibility and better theoretically achievable tracking capabilities, due to higher frequencies if downmixed to the complex baseband. On the other hand, a huge variety of d
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Binary Offset Carrier (BOC) ist ein spezielles Kodierungsverfahren zur Frequenzspreizung mit Anwendungsbereichen in der digitalen Nachrichtentechnik beim so genannten Codemultiplex. Dabei werden mehrere zu übertragene Nutzdatenfolgen durch unterschiedliche pseudozufällige Codefolgen (PRN) unterschieden. BOC stellt eine spezielle Form von digitaler Modulationstechnik dar, die auch noch Teil von aktuellen Forschungsarbeiten ist. 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-carrier modulation, where a signal is multiplied by a rectangular sub-carrier of frequency equal to or greater than the chip rate. Following this sub-carrier multiplication, the spectrum of the signal is divided into two parts, therefore BOC modulation is also known as a split-spectrum modulation. Their major advantages are, that one can shape the spectrum to allow inter-system-compatibility and better theoretically achievable tracking capabilities, due to higher frequencies if downmixed to the complex baseband. On the other hand, a huge variety of different implementations or instantiations was setup, making it difficult to get the whole picture. Early (and sometimes recent) publications dealing with that topic usually do not include matched filters for pulse shaping as well as the concept of complex Gaussian noise - which is very often not treated correctly - to yield a mathematically consistent baseband description, that although complicated looking, models the physics correctly. I.e. if these standards are not treated correctly, theoretical results are not reliable. This is independent of the media and the peer-review and the person, who published it.
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