Cao Tian, Chen Shihan, Wang Mingyang, Wu Tianfeng, Zhang Hongming, Pan Changyong, Wang Ping, Wang Kaile, Song Jian
Opt Express. 2024 Mar 11;32(6):8537-8554. doi: 10.1364/OE.511819.
A theoretical channel impulse response (CIR) model of short-range non-line-of-sight (NLOS) ultraviolet communications (UVC) in noncoplanar geometry under the single-scatter condition is proposed. Simulation results obtained from the widely accepted Monte-Carlo (MC)-based channel model of NLOS UVC are provided to verify corresponding theoretical results obtained from the proposed theoretical single-scatter CIR model. Additionally, an outdoor experiment with a light-emitting diode (LED) as the light source is first designed to measure the channel step response of NLOS UVC and to further validate the proposed theoretical single-scatter CIR model. By varying the different parameters of the transmitter and the receiver, such as the baseline range, the inclination angle, the azimuth angle, the beam divergence angle, and the field-of-view angle, the results of the proposed theoretical single-scatter CIR model and the MC-based channel model are exhibited and further analyzed in detail. Results indicate that the computational time cost by the proposed theoretical single-scatter CIR model is decreased to less than 0.6% of the MC-based one with comparable accuracy in assessing the temporal characteristics of NLOS UVC channels. Additionally, theoretical results obtained from the proposed theoretical single-scatter CIR model manifest satisfactory agreement with corresponding experimental measurements.
提出了一种在单散射条件下非共面几何结构中短距离非视距（NLOS）紫外通信（UVC）的理论信道冲激响应（CIR）模型。提供了从广泛接受的基于蒙特卡罗（MC）的NLOS UVC信道模型获得的仿真结果，以验证从所提出的理论单散射CIR模型获得的相应理论结果。此外，首次设计了以发光二极管（LED）作为光源的户外实验，以测量NLOS UVC的信道阶跃响应，并进一步验证所提出的理论单散射CIR模型。通过改变发射机和接收机的不同参数，如基线范围、倾斜角、方位角、光束发散角和视场角，展示并进一步详细分析了所提出的理论单散射CIR模型和基于MC的信道模型的结果。结果表明，在所评估的NLOS UVC信道的时间特性具有可比精度的情况下，所提出的理论单散射CIR模型的计算时间成本降低到基于MC的模型的0.6%以下。此外，从所提出的理论单散射CIR模型获得的理论结果与相应的实验测量结果表现出令人满意的一致性。
