本文在GIS(Geographic Information System)空间分析技术支持下,结合COST231-Hata与自由传输模型进行GSM高频频段适用性研究,针对陇南丘陵山区地理环境下的通信覆盖及传输损耗进行预测计算,得到了研究区内基站信号各类传播损耗分级、强...本文在GIS(Geographic Information System)空间分析技术支持下,结合COST231-Hata与自由传输模型进行GSM高频频段适用性研究,针对陇南丘陵山区地理环境下的通信覆盖及传输损耗进行预测计算,得到了研究区内基站信号各类传播损耗分级、强度及各类空间可视化仿真。对于大尺度区域基于确定型传播模型的研究发现,COST231-Hata在GIS技术支持下,为GSM移动网络规划与优化提供了信号覆盖与损耗的预测可视化解决方案,解决了移动信号覆盖强弱可视化交互模式下模型参数分析、基站传播路径损耗预测计算、仿真结果计算分析的流程问题,为移动通信覆盖与传播预测提供工程技术方案支持,有较强的实用价值。展开更多
Wideband IMT-Advanced mobile communication systems tend to operate in the high frequency bands due to a relatively large capacity available. Thus, Measurement and modelling methods of radio propaga- tion eharaeteristi...Wideband IMT-Advanced mobile communication systems tend to operate in the high frequency bands due to a relatively large capacity available. Thus, Measurement and modelling methods of radio propaga- tion eharaeteristics are proposed for the field test of Chinese 4th generation （4G） trial system. The mea- surement system is established for 3.5GHz based on the sophistieated measurement instruments and the virtual instrument teehnology. The characteristic parameters of radio propagation sueh as path loss （PL） exponent and shadow fading standard deviation are extracted from measurement data, which result in the path loss model finally. The comparisons with other existing international models results validate our mea- surement in terms of path loss model. Based on the analysis of the existing extension model assumed for the microwave frequency at 3.5GHz, we find that the Stanford University Interim （SUI） model fits very well with the measurement result in the hotspot scenario, while the COST 231 model is closer to the mea- surement result in the suburban scenario. This result provides a measurement-based channel referenee for the development of the future IMT-Advanced systems in China.展开更多
文摘本文在GIS(Geographic Information System)空间分析技术支持下,结合COST231-Hata与自由传输模型进行GSM高频频段适用性研究,针对陇南丘陵山区地理环境下的通信覆盖及传输损耗进行预测计算,得到了研究区内基站信号各类传播损耗分级、强度及各类空间可视化仿真。对于大尺度区域基于确定型传播模型的研究发现,COST231-Hata在GIS技术支持下,为GSM移动网络规划与优化提供了信号覆盖与损耗的预测可视化解决方案,解决了移动信号覆盖强弱可视化交互模式下模型参数分析、基站传播路径损耗预测计算、仿真结果计算分析的流程问题,为移动通信覆盖与传播预测提供工程技术方案支持,有较强的实用价值。
基金supported by the High Technology Research and Development Programme of China(2007AA01Z278)
文摘Wideband IMT-Advanced mobile communication systems tend to operate in the high frequency bands due to a relatively large capacity available. Thus, Measurement and modelling methods of radio propaga- tion eharaeteristics are proposed for the field test of Chinese 4th generation （4G） trial system. The mea- surement system is established for 3.5GHz based on the sophistieated measurement instruments and the virtual instrument teehnology. The characteristic parameters of radio propagation sueh as path loss （PL） exponent and shadow fading standard deviation are extracted from measurement data, which result in the path loss model finally. The comparisons with other existing international models results validate our mea- surement in terms of path loss model. Based on the analysis of the existing extension model assumed for the microwave frequency at 3.5GHz, we find that the Stanford University Interim （SUI） model fits very well with the measurement result in the hotspot scenario, while the COST 231 model is closer to the mea- surement result in the suburban scenario. This result provides a measurement-based channel referenee for the development of the future IMT-Advanced systems in China.
