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- Binary_offset_carrier_modulation abstract "Binary Offset Carrier (BOC) modulation currently used in Galileo is a square sub-carrier modulation, where a signal is multiplied by a rectangular sub-carrier of frequency equal or higher to the chip (CDMA) 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.The main idea behind BOC modulation is to reduce the interference with BPSK-modulated signal, which has a sinc function shaped spectrum. Therefore, BPSK-modulated signals such as C/A GPS codes have most of their spectral energy concentrated around the carrier frequency, while BOC-modulated signals (used in Galileo system) have low energy around the carrier frequency and two main spectral lobes further away from the carrier (thus, the name of split-spectrum).BOC modulation has several variants: sine BOC (SinBOC), cosine BOC (CosBOC) Alternative BOC (AltBOC), multiplexed BOC (MBOC), Double BOC (DBOC) etc. and some of them have been currently selected for Galileo GNSS signals.A BOC waveform is typically denoted via BOC(m,n) or BOC, where is the sub-carrier frequency, is the chip frequency, , , and Mcps is the reference chip frequency of C/A GPS signal.A sine BOC(1,1) modulation is similar to Manchester code, that is, in digital domain, a '+1' is encoded as a '+1 −1' sequence, and a '0' is encoded as a '−1 +1' sequence.For an arbitrary modulation order, in sine BOC(m,n) case, a '+1' is encoded as an alternating sequence of '+1 −1 +1 −1 +1 ...', having elements, and a '0' (or '−1') is encoded as an alternating '−1 +1 ...' sequence, also having elements.BOC modulation is typically applied on CDMA signals, where each chip of the pseudorandom code is split into BOC sub-intervals, as explained above (i.e., there are BOC intervals per chip).The power spectral density of a BOC-modulated signal depends on the BOC modulation order and its derivation can be found, for example, in".
- Binary_offset_carrier_modulation wikiPageExternalLink page.cfm?voce=s2&idvoce=64&plugIn=1.
- Binary_offset_carrier_modulation wikiPageExternalLink v6n1p10.pdf.
- Binary_offset_carrier_modulation wikiPageExternalLink galileo-open-service-signal-in-space-interface-control-document.
- Binary_offset_carrier_modulation wikiPageExternalLink 174.
- Binary_offset_carrier_modulation wikiPageExternalLink 12829.
- Binary_offset_carrier_modulation wikiPageExternalLink tech_papers_00.
- Binary_offset_carrier_modulation wikiPageExternalLink PDFSTART.
- Binary_offset_carrier_modulation wikiPageID "22607263".
- Binary_offset_carrier_modulation wikiPageRevisionID "602767034".
- Binary_offset_carrier_modulation subject Category:Quantized_radio_modulation_modes.
- Binary_offset_carrier_modulation comment "Binary Offset Carrier (BOC) modulation currently used in Galileo is a square sub-carrier modulation, where a signal is multiplied by a rectangular sub-carrier of frequency equal or higher to the chip (CDMA) rate.".
- Binary_offset_carrier_modulation label "Binary Offset Carrier".
- Binary_offset_carrier_modulation label "Binary offset carrier modulation".
- Binary_offset_carrier_modulation sameAs Binary_Offset_Carrier.
- Binary_offset_carrier_modulation sameAs m.05zwxxn.
- Binary_offset_carrier_modulation sameAs Q863505.
- Binary_offset_carrier_modulation sameAs Q863505.
- Binary_offset_carrier_modulation wasDerivedFrom Binary_offset_carrier_modulation?oldid=602767034.
- Binary_offset_carrier_modulation isPrimaryTopicOf Binary_offset_carrier_modulation.