To introduce a newly automatic system of switch and broadcast the broadcast channel system of teletext.

介绍基于自动切换播出的正程电视图文信息频道播出系统.

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A - user spectrum optimization scheme of the downlink broadcast channel in single - phase power - line environment is discussed.

讨论了在 单相 电力线条件下实现下行广播信道 多用户 频谱优化的方案,以及电力线多用户频谱优化问题的数学模型.

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