论文部分内容阅读
大气分子和气溶胶颗粒对紫外光具有强烈的散射作用，以紫外光做载体可以实现非直视通信。紫外光通信中脉冲展宽问题对于减少码间干扰，提高系统传输速率具有重要意义。模拟了光子由发射端出发经多次散射到达接收端的全过程，建立了基于蒙特卡洛方法的无线紫外光非直视非共面多次散射通信模型。用模型仿真脉冲响应，结果表明：紫外光非直视非共面通信系统脉冲响应的半最大值宽度将随着收发仰角、收端偏转角的增大而增大，多次散射对脉冲展宽的贡献随着收发仰角的增大而增大。采用 OOK 调制方式，系统可传输的最大码速率随收发仰角的增大而减小。
Atmospheric molecules and aerosol particles have a strong scattering effect on UV light. Using UV light as carrier can realize non-direct vision communication. The pulse broadening problem in UV communication is of great significance for reducing intersymbol interference and improving the system transmission rate. The whole process of photon arrival from the transmitting end to the receiving end by multiple scattering is simulated. A non-direct-view non-coplanar multi-scattering wireless communication model based on Monte Carlo method is established. The results show that the half maximum width of the impulse response of the non-direct-view non-coplanar communication system of UV light will increase with the increase of the receiving and transmitting elevation angle and the receiving end deflection angle, and the multiple scattering Contribution increases with the elevation of sending and receiving. Using OOK modulation, the system can transmit the maximum code rate decreases with the elevation of the transceiver.