Analysis on radio immunity of TD-LTE to interference in high speed railway

As promising broadband wireless communication technology, applications of TD-LTE in high speed railway (HSR) are of inevitability. Since the radio port of TD-LTE is open, common EMC measures are limited, and consequently radio immunity is the key to TD-LTE in HSR. This work follows the EMC theory, and firstly analyzes major radio EMI in HSR, which is radiated EMI generated by pantograph. According to the characteristics of such EMI, immunity of TD-LTE is quantitatively researched with EESM algorithms. Results show that, although radiated EMI generated by pantograph has enough spaces to TD-LTE signals in frequency domain, the strength of EMI still has to be limited. Otherwise, TD-LTE will be interfered. Moreover this work proposed quantitatively immunity of TD-LTE in HSR, and it is valuable to formulate the EMC standards for TD-LTE equipment in HSR.