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直接序列扩频通信技术在铁路信号传输中的应用研究.pdf

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学兔兔 第21卷第4期 计算机与通信信号 VOl 21 NO 4 COMPUTER AND COMMUNICATION AND SIGNAL 史毒编 :1005—8451(2o12)04—0067.03 直接序列扩频通信技术在铁路信号传输中 的应用研究 王 伟,何 涛,强生杰 (兰州交通大学光电技术与智fl94,2~,1教育部重点实验室,兰州 730070) 摘 :为了满足铁路通信系统在数据传输中的大容量、高安全、可靠性等方面的要求, 本文提出了在干线铁路中利用直接序列扩频通信的方法,它是伪随机序列与窄带信息相乘,形 成扩频谱信号进行宽带传输的一种通信方式。直接序列扩频通信与GSM—R通信系统相比较,在 处理增益,抗干扰能力,测距、定时和隐蔽性上有着显著优势。将直接序列扩频通信应用到铁 路系统中,可提升铁路信号系统的安全可靠性和高效快捷程度。 关键 :直接序列;扩频通信;铁路信号;数据传输 rf1 分类 :U285 文献标识码:A Research on application of Direct Sequence Spread Spectrum Communication Technique in railway signal WANGWei,HETao,QIANG Sheng-jie (Key Lab of Opto—electronic Technology and Intelligent Control,Ministry of Education,Lanzhou Jiaotong University,Lanzhou 730070,China) Abstract:In order to meet the requirements of large capacity,high security and reliability in Railway Communication System for data transmission,direct sequence spread spectrum communication was proposed in main line railway.Direct sequence spread spectrum communication was a broadband communications through multiplying pseudo--random sequence and narrow·-band information to form the extended spectrum signa1.The application of direct sequence spread spectrum communication have a significant advantage on the processing gain,anti—interference ability,ranging,timing,and concealment over the existing railway GSM—R Communication System.A
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