|Table of Contents|

Adaptive demodulation method for balise uplink-signal(PDF)

《交通运输工程学报》[ISSN:1671-1637/CN:61-1369/U]

Issue:
2013年06期
Page:
107-112,118
Research Field:
交通信息工程及控制
Publishing date:

Info

Title:
Adaptive demodulation method for balise uplink-signal
Author(s):
ZHAO Hui-bing1 QUAN Hong-yu1 LIANG Di2
1. School of Electronic and Information Engineering, Beijing Jiaotong University, Beijing 100044, China; 2. State Key Laboratory of Rail Traffic Control and Safety, Beijing Jiaotong University, Beijing 100044, China
Keywords:
railway signal train control system balise uplink-signal adaptive demodulation anti-interference
PACS:
U491.51
DOI:
-
Abstract:
The characteristic of balise uplink-signal was analyzed. An adaptive demodulation method for balise uplink-signal was introduced. The frequency of uplink-signal was tracked by using adaptive least mean square(LMS)algorithm. The signal was demodulated according to the calculated tracking residual. The demodulation performance was verified according to the Eurobalise test specification and then compared with zero-crossing detection method and non-coherent demodulation method. Simulation result shows that adaptive demodulation method can meet the demodulation performance requirements when there exists extreme migration of uplink-signal. When the signal to noise ratio(SNR)is 7 dB, the error rate of adaptive demodulation method is almost 0, while the error rates of the zero-crossing detection method and the non-coherent demodulation method are 0.163 and 0.001 respectively. The adaptive demodulation method is simple to utilize and has strong anti-interference ability. It provides a foundation for the reliable application of balise in comparative harsh electromagnetic environment. 2 tabs, 11 figs, 15 refs.

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Last Update: 2013-12-20