| Presentation | 2007-11-08 Indoor Propagation Measurements for Wireless Controls : Measurement System and Basic Experiments Kouji ENDOU, Takaya YAMAZATO, Masaaki KATAYAMA, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In order to collect basic reference data for wireless controls of industrial equipments, we have constructed a system to measure the continuous (five seconds) wideband (23MHz) simultaneous propagation characteristics of multiple channels in 2.4GHz band. As a result, the propagation characteristics of two indoor wireless channels measured simultaneously, are expressed as functions of time and frequency. The result shows that the propagation loss considerably exceed its mean value locally in time-frequency plane, and that the probability of this drops of the signal is not negligible. In addition, we show that the probability of the deep fades which continuess more than the permissible delay time for the control communication system (20ms) is also non-negligible. Moreover, we clarify that, even when the antennas are separated by several wavelength, still the correlation of the time-varying faded signal levels at the antennas is relatively high and should be taken into account in designing a wireless control systems. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | wireless control / indoor propagation / channel measurement / reliable robust radio / space-time coding technique / ISM band |
| Paper # | RCS2007-97 |
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| Conference Information | |
| Committee | RCS |
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| Conference Date | 2007/11/1(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Radio Communication Systems (RCS) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Indoor Propagation Measurements for Wireless Controls : Measurement System and Basic Experiments |
| Sub Title (in English) | |
| Keyword(1) | wireless control |
| Keyword(2) | indoor propagation |
| Keyword(3) | channel measurement |
| Keyword(4) | reliable robust radio |
| Keyword(5) | space-time coding technique |
| Keyword(6) | ISM band |
| 1st Author's Name | Kouji ENDOU |
| 1st Author's Affiliation | Department of Electrical Engineering and Computer Science, Graduate School of Engineering, Nagoya University() |
| 2nd Author's Name | Takaya YAMAZATO |
| 2nd Author's Affiliation | Eco Topia Science Institute, Nagoya University |
| 3rd Author's Name | Masaaki KATAYAMA |
| 3rd Author's Affiliation | Eco Topia Science Institute, Nagoya University |
| Date | 2007-11-08 |
| Paper # | RCS2007-97 |
| Volume (vol) | vol.107 |
| Number (no) | 306 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |