日盲紫外光高速通信机国产化研究

Domestic manufacturing research of solar blind ultraviolet high-speed communication

为用国产手段提高日盲区紫外激光机非视线方式(non-line of sight,NLOS)传输信号的高速通信性能,研制了紫外声光调制器对紫外光进行调制;并联使用已国产化紫外光电倍增管接收信号;设计了一种新的调制方式—改进的差分脉冲位置调制(IDPPM)为核心的软判决解码技术,并将软判决与硬判决作了比较,同时将软判决时对时隙错误概率的改善做了仿真,验证其对通信改善的真实性.用紫外光进行高速通信,关键在于能够对信号进行高比特率的编码、调制与解调,这是紫外通信区别于其他通信方式的重要特征.

To improve the performance of solar blind UV non-line of sight high-speed communication with the domestic instrument, UV acousto-optic modulator for UV-modulation is designed and the domestic ultraviolet pulse modulator tube is used parallel. A new modulation-improved differential pulse position modulation （IDPPM） is introduced and used as the core of soft-decision decoding. The soft-decision decoding was compared with hard-decision and the improvement of the time slot error probability was simulated to verify the authenticity of the communications improvements. The key is to signal the high-bit rate encoding and modulation as UV signals, which is an important characteristic different from other means.