中文摘要：

根据接触网开关站采用无线遥控对无线通信的具体技术要求,分析GSM网络的适应性;针对GSM网络可能出现的信号干扰问题,基于小波分析理论,对发射的原信号采用小波变换的方法进行信号膨胀放大及离散化,以达到信号可编程的目的;然后用小波分解与重构方法对离散的原信号进行加密发送,最后对接收到的加密信号再解密还原信号,从而保证了接触网无线遥控开关站无线通信的安全、可靠。将提出的信号离散化、分解和重构的算法运用于西北地区某工矿企业专用线接触网无线遥控开关站,经近3年的使用证明,该接触网无线遥控开关站的无线通信安全且稳定、可靠。

英文摘要：

The adaptability of GSM network was analyzed according to the specific technical requirements for the wireless communication of the wireless control adopted by the switch station of overhead contact line. Signal interference might occur in GSM network. Based on wavelet analysis theory, the launched original signal was first expanded, amplified and discretized by wavelet transform method to make the sig- nal programmable. Then the discretized original signal was encrypted and sent by wavelet decomposition and reconstruction methods. Finally, the received encrypted signal was decrypted and reduced so as to ensure the security and reliability of the wireless communication for the wireless control switch station of overhead contact line. The proposed algorithm for signal discretization, decomposition and reconstruction was applied to the wireless control switch station of the overhead contact line for the dedicated railway of a certain industrial and mining enterprise in northwest China. After three-year＇s application, it has proved that the wireless communication of that wireless control switch station is stable and reliable.