ID |
原文 |
译文 |
12564 |
数值计算结果表明,与传统的 MRTD 算法相比,S-MRTD 算法在使用粗网格和较高的稳定性常数时,仍能得到精确计算结果,且具有内存使用少、计算效率高的特点。 |
The numerical results show that compared with the conventionaltime domain multiresolution (MRTD), the S-MRTD method can still get accurate results when using coarse grids andhigh stability constants, which has the characteristics of less memory usage and higher computational efficiency. |
12565 |
针对我国 5G 网络受大气波导影响的特点及其形成条件,提出了一种具有广泛适应性的大气波导干扰消除方法。 |
Based on the characteristics and forming conditions of 5G system affected by atmospheric ducts, awidely adaptable interference cancelation method is proposed in this paper. |
12566 |
即利用网络测量计算出精准的俯仰角调整值,结合大规模阵列天线技术带来的广播波束调整能力,实现实时自动的俯仰角下压以消除干扰源。 |
This method uses network measurements tocalculate accurate the adjustment values of angle of pitch, and applies the flexibility of changing broadcast beam patternfrom large-scale antenna array technology, thus it can achieve real-time automatic pitch depression to eliminate remote interference. |
12567 |
对大气波导高发区的琼州海峡、北部湾和南海区域的 5G 网络,采用本文方法计算出需要调整的俯仰角并对覆盖和干扰进行仿真,结果表明在保证本区域 5G 网络覆盖能力的同时,大气波导带来的大尺度 5G 网内干扰显著降低。 |
In this paper, network measurements are performed on the Qiongzhou Strait, Beibu Gulf, and South ChinaSea areas with high incidence of atmospheric ducts, then angle of pitch are calculated, coverage and interference aresimulated. The results show that the large-scale 5G network interference caused by the atmospheric duct is significantly reduced with the coverage still satisfying. |
12568 |
该方法相比于通过 5G 网内调整保护周期 (protection period,GP) 规避远端干扰的方式,更能抗长距离干扰,适用于大气波导高发沿海区域。 |
The method is more resistant to long-distance interference than avoiding remote interference by adjusting the protection period (GP) in the 5G network, and is suitable for atmospheric ductshigh-risk in coastal areas. |
12569 |
海洋蒸发波导是实现近海面超视距电波传播的重要环境,利用蒸发波导模型和电波传播数值算法是获取路径损耗的主要途径。 |
Evaporation duct is an anomalous transhorizon propagation environment in marine surface layer. Using evaporation duct model and electromagnetic wave propagation model is the main way to obtain path loss. |
12570 |
基于海上平台约 7 个月测量的水文气象参数,对比了 Paulus 提出的 PJ 模型和美国海军研究生院(Naval Postgraduate School, NPS)提出的 NPS 模型,同时利用约 1 个月的海上超视距传播测试数据,分析了蒸发波导模型在不同环境条件下路径损耗的计算结果。 |
The model proposed by Paulus and Jesk and another model established originally by American Naval Postgraduate School (NPS)are the most widely used, which are called the PJ model and NPS model, respectively. Based on the nearly sevenmonths meteorological and oceanographic (METOC) parameters measurements on a sea platform, the two evaporation duct models are compared. Meantime, using nearly one month propagation experiment data, the relative performance ofthe two evaporation duct models in propagation path loss computation is compared under different environmentalconditions. |
12571 |
研究表明:1)PJ 和 NPS 蒸发波导模型在不稳定大气条件下预测一致性较好,但通常 NPS 预测的蒸发波导高度小于 PJ 模型,而在稳定大气条件下预测结果相差较大。 |
The results indicate: 1) both of the two evaporation duct models performed reasonably well in unstableatmospheric condition, the evaporation duct heights predicated by NPS are usually lower than PJ. In stable atmosphericconditions, the two models are vastly different. |
12572 |
2)利用单点水文气象测量数据,NPS 模型预测的传播损耗优于 PJ 模型,特别是在不稳定大气条件下。 |
2) using the single point hydrological meteorological measurements, NPS model is better than PJ model in path loss prediction, especially in unstable atmospheric condition. |
12573 |
3)以传播损耗统计累积中值为标准,PJ 和 NPS 模型预测的中值路径损耗与实际测量损耗中值的差值分别为–14.02 dB 和–10.06 dB。 |
3) based on thecumulative median path loss distribution, the PJ and NPS model differences are –14.02 dB and –10.06 dB, respectively. |