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The difference between mobile phone signal and short message signal
The difference between mobile phone signal and short message signal lies in the different ways of signal generation: mobile phone signal is a high-speed transmission technology in wireless environment, and its main idea is to divide a given channel into many orthogonal subchannels in frequency domain, and each subcarrier is transmitted in parallel. Short message signal is a kind of high-frequency oscillation wave, which encrypts the sound wave, loads it on the high-frequency electric wave generated by the mobile phone's own circuit, amplifies it and sends it to the nearest mobile base station through the antenna.
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