从有线数字电视射频信号特征参数提取着手，建立了一套识别16 QAM和64 QAM射频信号调制方式的数学算法。

Based on the characteristic extracting of RF signal in digital cable TV system, this paper puts forward an algorithm for modulation recognition between 16qam and 64qam RF signals.

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事实上，由于频率较低，在射频接触水平相同的情况下，人体从调频收音机和电视吸收的信号比从基台吸收的信号要多四倍。

In fact, due to their lower frequency, at similar RF exposure levels, the body absorbs up to five times more of the signal from FM radio and television than from base stations.

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这低于或相当于无线电或电视广播发射机造成的射频接触。

This is lower or comparable to RF exposures from radio or television broadcast transmitters.

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