An Experimental Study of 2.4GHz Frequency Band Leaky Coaxial Cable in CBTC Train Ground Communication

摘要

Leaky Coaxial Cables (LCXs) are widely used in tunnels and underpasses for smoother electric field coverage in wireless communication systems. But there are very few studies on LCXs working in 2.4GHz, which are the frequency bands used in 802.11b/g. The paper shows characteristics of 2.4GHz LCX through simulations and field tests. The results show that the communication through 2.4GHz frequency band LCX can provide stronger radio signals and thus better throughput compared with free space in tunnels. What's more, the handover interruption time between APs can be reduced because the Ping-Pong handover is avoided through LCX.