随着脉冲编码调制技术的出现，把模拟信号转换为数字信号的原理得到广泛应用；
The principle of converting analog signals to digital signals bacame popular with the introduction of pulse code modulation ;
PP M脉冲位置调制通信技术作为一种新兴的通信技术，具有编码简单、能量传输效率高的优点。
As a new communication technology, PPM (pulse position modulation) technology can be easily coded, and has a high efficiency of energy transmission.
采用DSP技术产生混沌信号，再量化、编码成二值序列，用来调制uw B脉冲信号。
Chaotic sequences were generated, quantized and coded into binary sequences which were used for modulation of UWB signal based on DSP technology.
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