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發表於 2019-1-11 16:52 
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原帖由 殘廁硬硬的蛇 於 2019-1-11 03:42 PM 發表


"去年，NTT Docomo在東京晴空塔上測試了華為5G終端，做到了1.2公里覆蓋、4.52Gbps的下行及1.55Gbps的上行速率，同時信號穿透玻璃的損耗僅為10dB。"
你要嘅玻璃穿透
https://ek21.com/news/3/9524/ ...
用500MHZ 達到27Gbps data...

https://www.zdnet.com/article/ntt-docomo-and-mitsubishi-electric-hit-27gbps-5g-speeds-in-car/

        NTT DoCoMo has announced attaining 5G speeds of 27Gbps during outdoor trials with Mitsubishi Electric in Kamakura, in Japan's Kanagawa Prefecture.
According to the Japanese carrier, this was the world's first 5G transmission to exceed a peak speed of 20Gbps using one terminal, with a communication distance of 10 metres attaining the 27Gbps speed, and a speed of 25Gbps over 100 metres.
NTT DoCoMo used the 28GHz millimetre-wave (mmWave) frequency band, massive-element antenna systems, and 16-beam spatial multiplexing technology with 500MHz bandwidth, which they said could be used to transmit high-speed connectivity to vehicles with multiple passengers such as trains and buses.
"Base-station antennas installed on the wall of a building directed beams to mobile-terminal antennas installed on the rooftop of a vehicle," the companies said, explaining that massive-element antenna systems technology allow for several data streams to be transmitted in parallel.
"The mobile terminal moved along two different streets. The distance of one mobile terminal was 10m from the base station and the distance for the other was 100m."

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#2
發表於 2019-1-11 16:56 
主要係16x16 mimo,呢個係唯一重點

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