Year-round 2019-2020 statistics for the availability of 40 Gbps 70/80 GHz radio across the Yenisei river in the Arctic Circle was revealed for the public.
DOK Ltd, ELVA’s manufacturing partner in Russia today has reported availability statistics for 40Gbps E-band wireless channel commissioned in August 2019 for Norilsk Nickel (LSE: MNOD) and broadband Internet access for local residents. This installation of E-Band PPC-10G-E-HP / 2+0 radios was done by DOK Ltd. engineers jointly with specialists of Edinstvo Ltd., a subsidiary of Norilsky Nickel, who is responsible for the telecommunications of the holding..
PPC-10G-E-HP / 2+0 radios operate in the frequency range 70/80 GHz and have two independent 10 Gigabit Ethernet channels. Two PPC-10G-E-HP / 2 + 0 radio bridges with various center frequency and cross-polarization of the signal allows getting 40 Gbps aggregate total bandwidth.
Pavel Vadov, technical director of Edinstvo Ltd., said, “We are pleased with the operation of the radio channel between the Igarka and Priluki sites across Yenisei river. The equipment meets our requirements for the availability of a communication line and has shown itself well when operated in the Arctic Circle. Now we are considering the possibility of increasing the capacity of the radio bridge by 4x more 10GE channels, using similar equipment from DOK for the 40.5-43.5 GHz Q-band spectrum.”
The actual annual availability of the aggregated channel for four transceivers shows compliance with the calculated values according to the line budget calculator. In terms of rain zones according to ITU-R PN.837-1 recommendation, Igarka with a value of 17 mm/h for 0.01% of the annual probability of rainfall is located between the rain zones C (15 mm h) and D (19 mm/h). The projected availability of the channel was confirmed experimentally, occupying an intermediate value between the calculated values for rain zones C (15 mm/h) and D (19 mm/h).
The equipment met Edinstvo operator’s requirements for the availability of a communication line and has shown itself well operated in the Arctic Circle.
The diagram shows the actual availability of the aggregated channel when operating in the adaptive radio modulation mode, with modulation schemes switching from QAM128 to BPSK. The hardware-controlled mode of adaptive modulation of the PPC-10G-E-HP / 2 + 0 radio bridges ensures the ability of the wireless communication line to maintain a connection at various rain levels by switching from QAM-128 modulation to lower types of signal coding QAM-64, QAM-32 etc. to BPSK. This increases the link budget ratio of the radio by temporarily reducing the data rate. After passing the rain front, the automation restores the nominal values of the 10 Gbps throughput for each transceiver.
Founded in 1993, ELVA -1 has facilities in Estonia and contracted manufacturing in St.Petersburg, Russia. Since 1993 the company has designed and manufactured millimetre wave equipment for communications and scientific sectors. For the past decade ELVA-1 has concentrated on designing high quality communications point-to-point radios, this has culminated in the release of the PPC-10G, the world’s longest range commercially available 10+ Gigabit radio. Company website for telecom products http://tele.elva-1.com.
About NORILSK NICKEL
PJSC «MMC NORILSK NICKEL» is a diversified mining and metallurgical company, the world’s largest producer of refined nickel and palladium and a leading producer of platinum, cobalt, copper and rhodium. The company also produces gold, silver, iridium, selenium, ruthenium and tellurium.
The production units of «NORILSK NICKEL» Group are located at the Norilsk Industrial District, on the Kola Peninsula and Chita region in Russia as well as in Finland and South Africa. PJSC «MMC «NORILSK NICKEL» shares are listed on the Moscow and Saint-Petersburg Stock Exchanges. PJSC «MMC «NORILSK NICKEL» ADRs trade over the counter in the US and on the London and Berlin Stock Exchanges. Company website https://www.nornickel.com.