| 摘要: |
| 为实现对流层散射通信的实时性，针对散射通信延迟估计问题，提出了一种不事先进行信道测量的对流层通信延迟计算方法。首先利用全球压力和温度2（GPT2）模型计算气象数据，然后采用射线描迹法对大气层分层并积分求和，最后计算出对流层散射通信延迟。采用与射线描迹法相结合的方法，摆脱了射线描迹法对探空数据的依赖。最后选取我国三个典型测量站数据进行算例分析，计算结果与我国对流层延迟实际分布特征相吻合，为研究在不事先进行信道测量的情况下计算对流层散射通信延迟量提供了一种新思路。 |
| 关键词: 散射通信 斜延迟 全球压力和温度2模型 射线描迹法 |
| DOI： |
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| 基金项目:国家自然科学基金资助项目(61571459) |
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| An estimation method of slant delay in troposcatter communication |
| HU Denghua,LIU Jiye,CHEN Xihong,WANG Jie |
| (Air and Missile Defense College,Air Force Engineering University,Xi′an 710051,China) |
| Abstract: |
| In order to realize real time troposcatter communication,a method for calculating troposcatter communication delay without channel measurement is proposed. First,the meteorological data is calculated by Global Pressure and Temperature 2(GPT2) model.Then,the troposcatter communication delay is calculated based on ray tracing method. The calculation result with the data of three typical measuring stations in China is coincided with the actual distribution characteristics of tropospheric delay in China. This method is a hybrid method combining the GPT2 model and ray tracing which avoids the dependence on sounding data. This paper offers a new idea and method for calculating the troposcatter communication delay without channel measurement. |
| Key words: troposcatter communication slant delay global pressure and temperature 2(GPT2) model ray tracing |
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