发明名称 |
Radio Wave Propagation Environment Measuring Apparatus, Radio Network Construction System, and Method For Measuring Radio Wave Propagation Environment |
摘要 |
A method for measuring a radio wave propagation environment includes installing radio signal transmission and reception apparatuses where a radio network system is to be constructed and obtaining an electromagnetic wave measured value of a signal between transmission and reception apparatuses; estimating an electromagnetic wave propagation state of the signal using an electrical property and information on a three-dimensional structure at the site to obtain an electromagnetic wave estimated value; making a comparison between measured and estimated values for each time of day to determine when errors between measured and estimated values exceed a reference value; obtaining an electromagnetic path between transmission and reception apparatuses; and modifying structure information in the wave path to re-obtain the estimated value; and comparing the measured re-obtained estimated value to modify the three-dimensional structure information so that the error value becomes smaller. |
申请公布号 |
US2014114635(A1) |
申请公布日期 |
2014.04.24 |
申请号 |
US201114126173 |
申请日期 |
2011.06.16 |
申请人 |
SATO YOSHIHITO;YAMADA TSUTOMU;ENDO HIROMICHI;HITACHI, LTD. |
发明人 |
SATO YOSHIHITO;YAMADA TSUTOMU;ENDO HIROMICHI |
分类号 |
H04W16/18 |
主分类号 |
H04W16/18 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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