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数字复接技术主要是指解决ＰＣＭ (脉冲编码调制 )信号由低次群到高次群合成的技术。在频分制载波系统中 ,高次群系统是由若干个低次群信号通过频谱搬移叠加而成。如 6 0路载波是由5个 12路载波经过频谱搬移叠加而成 ;180 0路载波是由 30个 6 0路载波经过频谱搬移叠加而成。在
Digital multiplexing technology mainly refers to the solution of PCM (pulse code modulation) signal from low to high sub-group technology. In the frequency division carrier system, the high-order group system is composed of several low-order group signals that are superimposed by spectrum shifting. For example, the 60 carriers are formed by the superimposition of 5 12 carriers after spectrum shifting; and the 180 0 carriers are formed by the superimposition of 30 6 0 carriers after spectrum shifting. in