The generating of pseudo random sequence is one of the key subjects to realize the spread spectrum technique upgrade for BPC low frequency time code radio station.

伪随机序列的产生是实现BPC低频时码发播台扩展频谱技术升级的一个重要环节。

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Mobile communication system 's upgrade needs new frequency. Base station antennas are needed to accord with the new frequency. This will increase the number of the base station antennas.

移动通信系统的不断升级，要求配置新的频段，这就要求适合新频段的基站天线，这样必然会增加天线的数目。

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ABB, the leading power and automation technology group, has been selected by Hydro-Québec, Canada, for an upgrade of a high-voltage, direct current (HVDC) converter station.

全球领先的电力自动化集团被加拿大魁北克水电公司选中，为其高压直流换电站进行升级。

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Councillor Matthew Evans who was the leader of Newport council when the station upgrade was unveiled has described the leaks as "embarrassing".

BBC: Newport station

It's now going to upgrade a train station in Portland.

WSJ: High-Speed-Rail Costs Irk States

Network Rail said the upgrade work will make the station more accessible, reduce congestion and increase the number of trains stopping at the station from 70 to 88 per hour.

BBC: London