低压电力线双路扩谱通信系统

由于低压电力线的信道特性异常恶劣，为了利用低压电力线实现可靠通信，把数字载波调制与扩谱技术等现代通信技术应用于低压电力线通信，提出了数字载波调制与直序列扩谱(DS)相结合的低压电力线通信模式，建立了低压电力线的MSK双路扩谱通信系统模型；基于该模型，研制了低压电力线的MSK双路扩谱通信电路系统。实验结果表明：该系统不仅满足了电力线通信信道有效带宽窄的特点，实现了较好的频谱利用率，而且具有较强的抗干扰能力。因此，该低压电力线扩谱通信系统能较好地抑制低压电力线通信信道的干扰，提高了通信的可靠性，可广泛应用于低压电力线通信领域。

Low Voltage Power Line Communication System with Double-Pathway Spread Spectrum

Because the channel characteristic of low voltage power line is unconventionally adverse, in order to realize reliable communication on low voltage power line, Digital Carrier Modulate and Spread Spectrum is applied on the communication over low voltage power line. A new communication pattern is suggested,which is based on MSK/DS integrated on low voltage power line. The communication system model is set up with MSK and double-pathway spread spectrum for low voltage power line. Based on the model, its circuits are developed. The experiment result indicates: MSK/DS integrated system cannot only satisfy the characteristics that the channel bandwidth of low voltage power line is narrow, but also it has rather strong anti-jamming ability. Thus, the system can restrain the noise from low voltage power line and improve communication reliability. It may be widely applied to the communication field using low voltage power line.