直接序列扩频通信技术在铁路信号传输中的应用研究

Research on application of Direct Sequence Spread Spectrum Communication Technique in railway signal

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。

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 signal. 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. Applying the direct sequence spread spectrum communications to the Railway System would enhance the safety and reliability of the Railway Signal System as well as efficient and convenience.