Performance simulation is very important to the research of smart antenna technology, which is one of the key technologies in third generation mobile communications.

性能仿真对于作为第三代移动通信关键技术之一的智能天线技术的研究具有十分重要的意义。

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Therefore, the major mobile operators are actively building a third-generation mobile communications networks.

因此，各大移动运营商都在积极建设第三代移动通信网络。

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The third generation mobile communications systems have the advantage of large capacity, low consumed power, fine voice quality and confidentiality.

第三代移动通信系统具有容量大，功耗低，通话质量高和保密性好等优点。

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