针对布里渊光时域反射(BOTDR)光纤传感系统对传感距离和信号检测的要求，提出了一种基于Golay 编码和Simplex 编码的混合G-Simplex 编码技术，并混合使用G-Simplex 编码与叠加平均算法对BOTDR 信号进行了处理。结果表明，该方法在保证系统空间分辨率的情况下，采用一定的编码长度提高了系统的信噪比，增加传感距离；在去噪效果相同的情况下，可以增强脉冲响应强度，大幅度减少平均叠加次数，降低弱信号检测的难度。

According to the requirements of the sensing distance and signal detection for the Brillouin optical time domain reflectometry (BOTDR) sensing system, a hybrid G-Simplex coding technology is proposed based on Simplex code and Golay code. The BOTDR signal is processed by combining the G- Simplex coding with the average superposition algorithm. The results demonstrate that this method can keep the space resolution. The signal-to-noise ratio and sensing distance is improved by using a certain code length. Moreover, with the same denoising effect, the intensity of impulse response can be improved and the superposition times can be largely decreased, which reduce the difficulty of weak signal detection.