Discusses about the structure of PLC broadband access network, the character of PLC channel and the modulate technology used in PLC.
讨论了宽带plc接入网的结构，plc信道特性以及PLC使用的调制技术。
Realizes V. 29 signal basic modulate and demodulate procedure which includes square root raised cosine rolling-off shaping filter and orthogonal channel signal modulator and demodulator.
分别实现了V．29信号基本调制解调过程，包括平方根升余弦滚降脉冲成形技术的滤波器实现，以及对信号的正交调制与解调过程。
ABA is the known signal substance in the adversity and can modulate the S-type anion channel situated in the guard cells.
已知aba为重要的逆境信号物质，也为调控保卫细胞膜上s -型阴离子通道的物质。
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