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 Page 595 - 5G Basics - Core Network Aspects           Basic HTML Version Table of Contents View Full Version Page 595 - 5G Basics - Core Network Aspects P. 595 Transport aspects 2 Optical transceiver Optical transceiver Rightward Rightward RF-band RF-band Rightward RF-band subcarrier E/O Analog RoF O/E subcarrier RF-band Rightward RF signal filter converter converter filter RF signal Leftward Fibre-optic Leftward RF-band MUX/DEMUX link MUX/DEMUX RF-band Leftward RF-band subcarrier O/E E/O subcarrier RF-band Leftward RF signal filter converter converter filter RF signal Analog optical interfaces a) Rightward Optical transceiver Optical transceiver Rightward IF-band IF-band Rightward IF-to-RF subcarrier E/O Analog RoF O/E subcarrier IF-to-RF Rightward RF signal converter converter converter converter RF signal Leftward Fibre-optic Leftward IF-band MUX/DEMUX link MUX/DEMUX IF-band Leftward RF-to-IF subcarrier O/E E/O subcarrier RF-to-IF Leftward RF signal converter converter converter converter RF signal Analog optical interfaces Reference frequency Reference frequency for up/down convertion b) for up/down convertion Rightward Optical transceiver Optical transceiver Rightward I/Q baseband I/Q baseband Rightward RF-to-I/Q signals E/O Analog RoF O/E signals I/Q-to-RF Rightward RF signal converter converter converter converter RF signal Leftward Fibre-optic Leftward I/Q baseband MUX/DEMUX link MUX/DEMUX I/Q baseband Leftward I/Q-to-RF signals O/E E/O signals RF-to-I/Q Leftward RF signal converter converter converter converter RF signal Analog optical interfaces Reference frequency Reference frequency for up/down convertion c) for up/down convertion G Suppl.55(15)_F6-5 Figure 6-5 – Configuration examples for analogue relay transmission: a) RF-band signal(s); b) IF-band signal(s); and c) I/Q baseband signals Figure 6-6 – Configuration examples for digital relay transmission: a) digitized RF-band signal(s); b) digitized IF-band signal(s); and c) digitized I/Q baseband signals 585     590     591     592     593     594     595     596     597     598     599     600          
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Score: 970734.6 - https://www.itu.int/en/publica.../files/basic-html/page595.html
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 Page 593 - 5G Basics - Core Network Aspects           Basic HTML Version Table of Contents View Full Version Page 593 - 5G Basics - Core Network Aspects P. 593 Transport aspects 2 Downlink Downlink digitized digitized Optical transceiver Optical transceiver RF-band subcarrier Downlink Digital RF-band payload data RF-band subcarrier E/O Digital RoF O/E D/A RF-band Downlink (digital baseband) modulator converter converter converter filter RF signal Uplink Fibre-optic digitized MUX/DEMUX link MUX/DEMUX RF-band Uplink Digital payload data RF-band subcarrier O/E E/O A/D RF-band Uplink (digital baseband) demodulator converter Digital optical converter converter filter RF signal interfaces Uplink digitized a) RF-band subcarrier Downlink Optical transceiver Optical transceiver Downlink digitized digitized IF-band subcarrier Downlink Digital IF-band payload data IF-band subcarrier E/O Digital RoF O/E D/A IF-to-RF Downlink (digital baseband) modulator converter converter converter converter RF signal Uplink digitized MUX/DEMUX Fibre-optic MUX/DEMUX link Uplink Digital IF-band payload data IF-band subcarrier O/E E/O A/D RF-to-IF Uplink (digital baseband) demodulator converter Digital optical converter converter converter RF signal interfaces Uplink digitized IF-band subcarrier Reference frequency b) for up/down convertion Downlink Downlink digitized digitized Optical transceiver Optical transceiver I/Q baseband signals I/Q baseband Downlink signals Downlink payload data Digital I/Q E/O Digital RoF O/E D/A I/Q-to-RF (digital baseband) modulator converter converter converter converter RF signal Uplink digitized MUX/DEMUX Fibre-optic MUX/DEMUX I/Q baseband link Uplink signals payload data Digital I/Q O/E E/O A/D RF-to-I/Q Uplink (digital baseband) demodulator converter Digital optical converter converter converter RF signal interfaces Uplink digitized I/Q baseband signals Reference frequency c) for up/down convertion G Suppl.55(15)_F6-4 Figure 6-4 – Configuration examples for transmitting digitized signal(s): a) digitized RF-band signal(s); b) digitized IF-band signal(s); and c) digitized I/Q baseband signal(s) In a digitized RF-band RoF transmission scheme such as that shown in Figure 6-4-a, the system consists of a digital RF-band modulator, a digital RF-band demodulator, a pair of optical transceivers, a fibre-optic link, a DAC, an ADC, and two RF-band filters. (...) At the remote end, the received downlink D-RoF signal is optically detected using an O/E converter in the optical transceiver. The detected electrical signal, which is the same as the modulating digitized RF-band subcarrier signal, is digital to analogue (D/A) converted to generate the desired downlink RF signal. For the uplink, a received uplink RF signal is A/D converted, and then the uplink digitized RF-band subcarrier signal modulates an optical carrier using another E/O converter in the optical transceiver.
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Score: 970575.6 - https://www.itu.int/en/publica.../files/basic-html/page593.html
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 Page 591 - 5G Basics - Core Network Aspects           Basic HTML Version Table of Contents View Full Version Page 591 - 5G Basics - Core Network Aspects P. 591 Transport aspects 2 Downlink Optical transceiver Optical transceiver Downlink I/Q baseband I/Q baseband Downlink signals signals payload data I/Q E/O Analog RoF O/E I/Q-to-RF Downlink (digital baseband) modulator converter converter converter RF signal Uplink MUX/DEMUX Fibre-optic MUX/DEMUX Uplink I/Q baseband link I/Q baseband Uplink signals signals payload data I/Q O/E E/O RF-to-I/Q Uplink (digital baseband) demodulator converter converter converter RF signal Analog optical interfaces Reference frequency a) for up/down conversion Downlink Optical transceiver Optical transceiver Downlink I/Q baseband I/Q baseband Downlink signals signals Downlink payload data I/Q E/O Analog RoF O/E I/Q-to-RF (digital baseband) modulator converter converter converter RF signal Uplink Fibre-optic Uplink I/Q baseband link I/Q baseband Uplink payload data IF-band signals O/E MUX/DEMUX MUX/DEMUX E/O signals RF-to-I/Q Uplink RF signal (digital baseband) demodulator converter Analog optical converter converter Reference frequency E/O interfaces O/E Reference frequency (analog electrical signal) converter converter b) G Suppl.55(15)_F6-2 Figure 6-2 – Configuration examples for transmitting equivalent low-pass signal(s): a) only I/Q baseband signals; and b) I/Q baseband signals and reference frequency In an I/Q baseband signals transmission scheme such as that shown in Figure 6-2-a, the system consists of an I/Q modulator, an I/Q demodulator, a pair of optical transceivers, a fibre-optic link, an I/Q-to-RF up-converter, an RF-to-I/Q down-converter, and a reference frequency generator. (...) At the remote antenna end, the received downlink optical signals are optically detected using an O/E converter in the optical transceiver. The detected electrical signals, which are the same as the modulating I/Q baseband signal, are frequency up- converted with the I/Q-to-RF up-converter and a reference frequency to the desired downlink RF signal. (...) The generated uplink I/Q baseband signals modulate an optical carrier using another E/O converter in the optical transceiver. The generated uplink multi-level or analogue baseband signals are transmitted over the fibre-optic link.
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Score: 962863.9 - https://www.itu.int/en/publica.../files/basic-html/page591.html
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Then, the downlink IF-band signal is frequency up-converted using the IF-to-RF up-converter and a reference frequency to the desired downlink RF signal. (...) For the uplink, a received uplink RF signal is frequency down-converted using the RF-to-IF down-converter to an IF-band subcarrier signal. (...) For the uplink, a received uplink RF signal is frequency down-converted using the RF-to-I/Q down-converter to an I/Q baseband signals.
Language:English
Score: 960004.5 - https://www.itu.int/en/publica.../files/basic-html/page594.html
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Optical transceiver Optical transceiver Downlink Downlink RF-band RF-band Downlink payload data RF-band subcarrier E/O Analog RoF O/E subcarrier RF-band Downlink (digital baseband) modulator converter converter filter RF signal Uplink MUX/DEMUX Fibre-optic MUX/DEMUX Uplink RF-band link RF-band Uplink payload data RF-band subcarrier O/E E/O subcarrier RF-band Uplink (digital baseband) demodulator converter converter filter RF signal Analog optical interfaces a) Downlink Optical transceiver Optical transceiver Downlink IF-band IF-band Downlink IF-to-RF payload data IF-band subcarrier E/O Analog RoF O/E subcarrier converter Downlink RF signal (digital baseband) modulator converter converter Uplink Fibre-optic Uplink IF-band MUX/DEMUX link MUX/DEMUX IF-band Uplink RF-to-IF payload data IF-band subcarrier O/E E/O subcarrier converter Uplink RF signal (digital baseband) demodulator converter converter Analog optical interfaces Reference frequency b) for up/down convertion Optical transceiver Optical transceiver Downlink Downlink IF-band RF-band Downlink subcarrier subcarrier Downlink payload data IF-band E/O Analog RoF O/E IF-to-RF (digital baseband) modulator converter converter converter RF signal Uplink Fibre-optic Uplink RF-band IF-band Uplink subcarrier link subcarrier Uplink payload data IF-band O/E MUX/DEMUX MUX/DEMUX E/O RF-to-IF (digital baseband) demodulator converter Analog optical converter converter RF signal Reference interfaces Reference frequency frequency for up/ E/O O/E down convertion converter converter c) G Suppl.55(15)_F6-1 Figure 6-1 – Configuration examples for transmitting subcarrier signal(s): a) RF-band; b) only IF-band signal; and c) IF-band signal and reference frequency In an RF-band RoF transmission scheme such as that shown in Figure 6-1-a, the system consists of an RF-band modulator, an RF-band demodulator, a pair of optical transceivers, a fibre-optic link, and two RF-band filters.
Language:English
Score: 959668 - https://www.itu.int/en/publica.../files/basic-html/page589.html
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For the purpose of transmitting a RoF signal, a set of one E/O converter, one O/E converter, and one MUX/DEMUX at the network side corresponds to an OLT, and another set of one E/O converter, one O/E converter, and one MUX/DEMUX at the user side corresponds to an ONU. (...) Figure 9-1-b and -c show the general configurations of E/O converter for direct modulation and O/E converter for incoherent detection, respectively. (...) SNI S/R R/S UNI OLT ODN ONU E/O O/E Radio SG SMF Radio SA MUX/DEMUX VOA MUX/DEMUX converter converter O/E E/O Radio SA Splitting and excess Radio SG converter loss emulation converter Optical access network under test a) E/O converter (for RoF transmission) Bias Electrical Optical input Electrical Electrical Light Optical Optical output amplifier BPF source amplifier BPF b) O/E converter (for RoF transmission) Bias Optical Electrical input Optical Optical Photo- Electrical Electrical output amplifier BPF detector amplifier BPF c) G Suppl.55(15)_F9-1 Figure 9-1 – General test model for RoF transmission over ODN: a) block diagram of measurement set-up; b) general configuration of E/O converter for direct modulation; and c) general configuration of O/E converter for incoherent detection 604     609     610     611     612     613     614     615     616     617     618     619          
Language:English
Score: 958422.95 - https://www.itu.int/en/publica.../files/basic-html/page614.html
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Appendix E AFISNET II - SITE REQUIREMENT Sites Accra Roberts Lagos Kano Maiduguri Abidjan Dakar Brazzaville Douala Ndjamena Niamey Libreville Antenna Antenna Antenna Antenna Antenna Antenna Antenna N/A Antenna Antenna N/A Antenna Antenna Topology/Architecture (zero cost) Mixte (Mesh / Star) Mixte (Mesh / Star) Mixte (Mesh / Star) Mixte (Mesh / Star) Mixte (Mesh / Star) Mixte (Mesh / Star) Mixte (Mesh / Star) Mixte (Mesh / Star) Mixte (Mesh / Star) Mixte (Mesh / Star) Mixte (Mesh / Star) Mixte (Mesh / Star) RF Equipment + Backup system (RF) SSPA Up converter Down Converter LNB SSPA Up converter Down Converter LNB SSPA Up converter Down Converter LNB SSPA Up converter Down Converter LNB SSPA Up converter Down Converter LNA SSPA Up converter Down Converter LNB N/A SSPA Up converter Down Converter LNB SSPA Up converter Down Converter LNB N/A SSPA Up converter Down Converter LNB SSPA Up converter Down Converter LNB Modems Modems (L- Band) Modems (L-Band) Modems (L-Band) Modems (L-Band) Modems (L-Band) Modems (L-Band) Modems (L-Band) Modems (L- Band) Modems (L- Band) Modems (L- Band) Modems (L-Band) Modems (L-Band) Baseband Equipment Router/Switch / Multiplexor Router/Switch / Multiplexor Router/Switch / Multiplexor Router/Switch / Multiplexor Router /Switch/ Multiplexor Router/ Switch/ Multiplexor Router/ Switch/ Multiplexor Router/Switch / Multiplexor Router/Switch / Multiplexor Router/Switch / Multiplexor Router/Switch / Multiplexor Router/Switch / Multiplexor Spare parts Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Transmission Protocols(zero cost) TCP/IP ; FR TCP/IP ; FR TCP/IP ; FR TCP/IP ; FR TCP/IP ; FR TCP/IP; FR TCP/IP; FR TCP/IP; FR TCP/IP; FR TCP/IP; FR TCP/IP; FR TCP/IP; FR AFISNET International stations (zero cost) Kano, Lagos, Libreville Niamey , Abidjan, Brazzaville, Lomé, Cotonou, Niamtougou Ouagadougou Bobo Luanda Atlantico Abidjan Dakar Kano, Accra, Libreville, Malabo, Lomé, Douala Cotonou, Lagos, Niamey, Douala, Nd’jamena, Brazzaville, Lomé, Libreville, Maiduguri Nd’jamena, Kano Accra, Roberts, Ouagadougou, Bamako, Dakar Bobo Luanda Atlantico Niamey, Abidjan, Bamako, Roberts, Brazzaville, Bangui, Bissau, Nouakchott, Piarco, Cayenne, Atlantico, Luanda, Alger Accra, Kano, Niamey, Ndjamena, Dakar, Douala, Libreville Bangui Malabo Johannesburg Khartoum Nairobi Luanda Kinshasa Lagos, Kano, Brazzaville, Ndjamena Libreville Malabo Lagos, Kano, Accra, Brazzaville, Niamey Maiduguri Algiers Tripoli Khartoum Lagos, Kano, Accra, Brazzaville, Ndjamena Algiers Addis Tripoli Lagos, Kano, Accra, Brazzaville, Ndjamena Operational Services(zero cost) ATS/DS, AFTN/AMHS Surveillance Data, AIDC, MET ATS/DS, AFTN/AMHS Surveillance Data, AIDC, MET ATS/DS, AFTN/AMHS Surveillance Data, AIDC, MET ATS/DS, AFTN/AMHS Surveillance Data, AIDC, MET ATS/DS, AFTN/AMHS Surveillance Data, AIDC, MET ATS/DS, AFTN/AMHS Surveillance Data, AIDC, MET ATS/DS, AFTN/AMHS Surveillance Data, AIDC, MET ATS/DS, AFTN/AMHS Surveillance Data, AIDC, MET ATS/DS, AFTN/AMHS Surveillance Data, AIDC, MET ATS/DS, AFTN/AMHS Surveillance Data, AIDC, MET ATS/DS, AFTN/AMHS Surveillance Data, AIDC, MET ATS/DS, AFTN/AMHS Surveillance Data, AIDC, MET Training Equipment training Equipment training Equipment training Equipment training Equipment training Equipment training Equipment training Equipment training Equipment training Equipment training Equipment training Equipment training Power supply UPS, AVR UPS, AVR UPS, AVR UPS, AVR UPS, AVR UPS, AVR UPS, AVR UPS, AVR UPS, AVR UPS, AVR UPS, AVR UPS, AVR Other Requirements (zero cost) Exchange programme Exchange programme Exchange programme Exchange programme Exchange programme Exchange programme Exchange programme Exchange programme Exchange programme Exchange programme Exchange programme Exchange programme In red color are requirements for interconnection between AFISNET and SADC/2 NAFISAT
Language:English
Score: 957071.6 - https://www.icao.int/WACAF/Doc...0Gen.%20SITE%20REQUIREMENT.pdf
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On the transmitter side, a received RF signal is frequency down-converted using the RF-to-IF down-converter to an IF-band subcarrier signal. (...) On the receiver side, the received RoF signal is optically detected using an O/E converter in the optical transceiver. The detected electrical signal, which is the same as the modulating IF-band subcarrier signal, is frequency up-converted using the IF-to-RF up-converter and a reference frequency to the desired RF signal. (...) On the transmitter side, a received RF signal is frequency down-converted using the RF-to-I/Q down-converter to I/Q baseband signals.
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Score: 953862.3 - https://www.itu.int/en/publica.../files/basic-html/page596.html
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At first, for both cases, an electrical signal modulates an optical carrier with an individual E/O converter to generate a modulated optical signal (RoF signal). (...) Each RoF signal is photodetected with an individual O/E converter to regenerate the original electrical signal. WDM RoF signal f .. . 0 f o1 f o2 f oN f o1 f o1 – f e le f o1 + f oN – f ele f oN + f o1 f E/O converter #1 f ele f e le O/E converter #1 f 0 f ele f o2 – f ele f o2 + f ele 0 f ele Wavelenght multiplexer Wavelenght demultiplexer f o2 f o2 f E/O converter #2 O/E converter #2 f 0 f ele 0 f ele . . . . . . f oN f oN f E/O converter #N O/E converter #N f 0 f ele 0 f ele a) WDM RoF signal f o1 .. . f f o1 f E/O converter #1 0 O/E converter #1 f 0 f o1 f o2 f oN 0 W avelenght multiplexer Wavelenght demultiplexer f o2 f o2 f E/O converter #2 O/E converter #2 f 0 0 . . . . . . f oN f oN f E/O converter #N O/E converter #N f 0 0 b) G Suppl.55(15)_F7-8 Figure 7-8 – Schematic block diagram of WDM transmission: a) for subcarrier signal(s) transmission; and b) for equivalent low-pass (equivalent baseband) signal(s) or digital signal(s) transmission 593     598     599     600     601     602     603     604     605     606     607     608          
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Score: 952968.3 - https://www.itu.int/en/publica.../files/basic-html/page603.html
Data Source: un
In an IF-band RoF transmission scheme such as that shown in Figure 6-1-b, the system consists of an IF- band modulator, an IF-band demodulator, a pair of optical transceivers, a fibre-optic link, an IF-to-RF up- converter, an RF-to-IF down-converter, and a reference frequency generator. (...) At the remote antenna end, the received downlink RoF signal is optically detected using an O/E converter in the optical transceiver. The detected electrical signal, which is the same as the modulating IF-band subcarrier signal, is frequency up-converted using the IF-to-RF up-converter and a reference frequency to the desired downlink RF signal. (...) For the uplink, a received uplink RF signal is frequency down-converted using the RF-to-IF down-converter to an IF-band subcarrier signal.
Language:English
Score: 945379.6 - https://www.itu.int/en/publica.../files/basic-html/page590.html
Data Source: un