一种海洋蒸发波导通信带限信道建模方法

针对海洋蒸发波导中多径信号场强计算和时延估计问题，提出了一种通信带限信道建模方法。给出了一种分段的射线追踪算法，提出了多径到达信号分离和场强计算的方法，考虑了电波空间扩散、粗糙海面反射和接收球；研究了时延估计规律、系统设计和使用策略。数值试验验证了建立的带限冲激响应建模方法的可行性，为海洋蒸发波导通信的链路预算和性能分析提供了有效的途径，通过控制信号频率、带宽和能量正余量可达到预期系统性能。

A bandwidth channel modeling method for sea evaporation duct communication

To compute the field and estimate the time delay of multi-path signal in sea evaporation duct(SED),a method of modeling communication bandwidth channel is presented.Algorithm of ray tracing in subsections is proposed.A method of separating arriving multi-path signal and computing field is put forward,considering space wave diffusion,rough surface reflection and reception sphere.Characteristics of time delay estimation,system design and strategies of usage are studied.Feasibility of the constructed method is verified by numerical experiments.The new method provides an effective way of link budget and performance analysis in SED communication to get expectable performances,with proper selection of signal frequency,bandwidth and energy surplus.