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众所周知,声音是模拟信号,在传输过程中,由于噪声的干扰和能量的损失总会发生畸变和衰减,所以模拟传输时,每隔一定的距离就要通过放大器来放大信号的强度,放大信号强度的同时,由噪声引起的信号失真也随之放大。当传输距离增大时,多级放大器的串联会引起失真的叠加,从而使信号的失真越来越大。而数字传输,只有代表了0和1变化模式的数据,方波脉冲式的数字信号在传输过程中除了会衰减外,也会发生失真。但它是采用转发器来代替放大器,转发器可以通过阈值判别等手段,识别并恢复其原来的0和1变化的模式,并重新产生一个新的完全消除了衰减和畸变的信号传输出去。这样多级的转发不会累积噪声引起的失真。
As we all know, the sound is an analog signal, the transmission process, due to noise and energy loss will always occur distortion and attenuation, so analog transmission, at a certain distance will have to amplify the signal through the amplifier to amplify the signal strength At the same time, the signal distortion caused by the noise is also amplified. When the transmission distance increases, the series of multi-stage amplifier will cause the distortion of the superposition, so that the signal distortion more and more. The digital transmission, only represents the 0 and 1 change mode data, square wave pulse digital signal in addition to the transmission process will decay, but also distortion. Instead, it uses a transponder instead of an amplifier. The transponder can identify and recover its original 0 and 1 changing modes by means of threshold discrimination and regenerate a new signal that completely eliminates attenuation and distortion. Such multi-level forwarding does not accumulate noise-induced distortion.