| 基于直接序列扩频技术列车定位接收机的实现 |
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| 引用本文： | 刘晓娟,党建武,张雯.基于直接序列扩频技术列车定位接收机的实现[J].兰州铁道学院学报,2009,28(4):97-101. |
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| 作者姓名： | 刘晓娟 党建武 张雯 |
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| 作者单位： | 兰州交通大学电子与信息工程学院,甘肃兰州,730070 |
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| 基金项目： | 甘肃省科技支撑计划项目 |
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| 摘 要： | 提出了一种基于直接序列扩频技术的列车定位接收机的实现方案．使用数字匹配滤波器对信号进行同步解扩，并用Costas环对信号进行解调，通过低通滤波器恢复传输的信息．基于无线扩频原理的列车定位接收机，具有信号接收质量高、抗干扰能力强、保密性好、系统容量大等优点，适用于安全性要求较高的轨道交通列车定位．
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| 关 键 词： | 直接序列扩频 列车定位 接收机 同步 解扩 解调 |
Implementation of Direct Sequence Spread Spectrum Based Train Positioning Receiver |
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| LIU Xiao-juan,DANG Jian-wu,ZHANG Wen.Implementation of Direct Sequence Spread Spectrum Based Train Positioning Receiver[J].Journal of Lanzhou Railway University,2009,28(4):97-101. |
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| Authors: | LIU Xiao-juan DANG Jian-wu ZHANG Wen |
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| Institution: | (School of Electronic and Information Engineering, lmnzhou Jiaotong University, Lanzhou 730070, China) |
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| Abstract: | A method of train positioning receiver based on the technique of direct sequence spread spectrum is presented. Digital matched filter is used for despreading synchronization signals, and Costas loop is applied to obtain the demodulation signals, and then the original signal is resumed by the low-pass filter. Wireless spread spectrum principle based train positioning receiver has the advantages of high signal reception quality, strong anti-interference abilities and large capacity. It is suitable for the need of the train positioning in rail transit system which has the need of high security. |
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| Keywords: | direct sequence spread spectrum train positioning receiver synchronization despread demodulation |
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