摘要
针对地铁穿地通信系统中,大地层对电磁波反射、折射带来的多径衰减问题,设计一种基于直接序列扩频的抗多径干扰通信系统。通过采用高随机性的Logistic扩频码,极大地提高了地铁穿地通信系统的抗多径干扰性能。仿真结果表明,针对不同的近地传输介质,系统误码率接近于0.1%,且随穿地深度增加,误码率趋于0,为以后近地穿地通信提供了一定的理论基础。
For the problem of multipath attenuation generated by electromagnetic wave reflection and refraction in the through-the-earth communication system for subway, an anti-interference through-the-earth communication system for subway based on spread spectrum technology is proposed. By adopting high randomness of Logistic spread spectrum code, the anti-multipath performance has greatly improved in the through-the-earth communication system for subway. The simulation results show that the bit error rate of the system is close to 0. 1 % when the signal is propagating in different near-earth transmission medium. And with the increase of the depth of penetration, the bit error rate tends to zero, a certain theoretical basis is established for near-earth through-the-earth communication.
出处
《电子技术应用》
北大核心
2017年第12期104-108,共5页
Application of Electronic Technique
基金
国家自然科学基金(61471046)
北京市科技专项(Z16110000-5016109)
关键词
地铁穿地通信
扩频
LOGISTIC
误码率
穿地深度
through-the-earth communication for subway
spread spectrum
Logistic
bit error rate
penetration depth
