Research on demodulation of balise uplink signal based on constant modulus algorithm

Qianshu Xue; Jianguo Li; Yunshui Zheng

doi:10.1117/12.3014972

4 March 2024 Research on demodulation of balise uplink signal based on constant modulus algorithm

Qianshu Xue, Jianguo Li, Yunshui Zheng

Proceedings Volume 12981, Ninth International Symposium on Sensors, Mechatronics, and Automation System (ISSMAS 2023); 129812E (2024) https://doi.org/10.1117/12.3014972
Event: 9th International Symposium on Sensors, Mechatronics, and Automation (ISSMAS 2023), 2023, Nanjing, China

Abstract

In the process of balise uplink signal transmission, the transmission signal is vulnerable to unknown electromagnetic interference, which leads to the increase of demodulation signal error rate and balise message error, which affects the train operation efficiency. In order to reduce the influence of electromagnetic interference on signal transmission, firstly, the signal transmission characteristics of balise uplink are analyzed. Secondly, according to the characteristics of uplink signals, the cost function based on Constant Modulus Algorithm (CMA) blind equalization algorithm is used, and the steepest descent method is used to optimize and update the equalizer weights, so as to equalize the uplink signals and reduce the interference of noise signals to useful signals. Finally, the variation of demodulation bir error rate (BER) indifferent signal-to-noise ratio (SNR) environments and during train operation after adding CMA algorithm to the balise transmission system is simulated and analyzed. The simulation results show that the demodulation method with CMA equalization has a lower bit error rate than the envelope detection method and the coherent demodulation method in different SNR environments. When the SNR is greater than or equal to 6dB, the demodulation BER with CMA equalization is much lower than that of the envelope detection method and the coherent demodulation method. The demodulation BER with CMA equalization is stable when the train speed changes, and far below 10 -6 , which meets the railway test standard. The content of this paper can provide theoretical reference for the application of balise in complex electromagnetic environment.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Qianshu Xue, Jianguo Li, and Yunshui Zheng "Research on demodulation of balise uplink signal based on constant modulus algorithm", Proc. SPIE 12981, Ninth International Symposium on Sensors, Mechatronics, and Automation System (ISSMAS 2023), 129812E (4 March 2024); https://doi.org/10.1117/12.3014972

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
7 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Demodulation

Education and training

Signal processing

Signal to noise ratio

Interference (communication)

Data transmission

Electromagnetism

Show All Keywords

Keywords/Phrases

Search In:

Publication Years