| Presentation | 2007-11-08 Effects of Spatial Correlation between Signal Subspaces on Indoor Localization Using Subspace Matching Shohei IKEDA, Hiroyuki TSUJI, Tomoaki OHTSUKI, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | We present experimental results about a spatial correlation between signal subspaces on indoor localization using a subspace matching. The localization using a subspace matching is based on location fingerprint method. An eigenvector spanning signal subspace is used in the subspace matching. The eigenvector is based on not received signal strengths (RSS) but direction of arrival (DOA) of incident signals on an antenna array, and thus is robust to fading and noise. In addition the eigenvector is unique to the location of the transmitter terminal owing to indoor reflections and diffraction of the electric wave. The eigenvector is obtained with the antenna array on the receiver side. To estimate the location of the transmitter terminal, we use the magnitude of inner product between the eigenvector obtained by observation and that obtained in advance at each reference location in the database (DB). When the terminal location is different from every reference location in the DB, the spatial correlation between signal subspaces influences the localization accuracy. In this case, subspace matching localization requires high spatial correlation between neighborhood signal subspaces in the DB. In this report, we evaluate the spatial correlation between signal subspaces by obtaining the eigenvectors at the fine-grid locations in an actual indoor environment. Experimental results show that, because the high spatial correlation between signal subspaces is quite local, to achieve high localization accuracy with subspace matching, we need the DB constructed such that the distance between the adjacent reference locations is short. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | indoor localization / signal subspace / subspace matching / antenna array |
| Paper # | RCS2007-99 |
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| Committee | RCS |
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| Conference Date | 2007/11/1(1days) |
| Place (in Japanese) | (See Japanese page) |
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| Topics (in Japanese) | (See Japanese page) |
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| 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) | Effects of Spatial Correlation between Signal Subspaces on Indoor Localization Using Subspace Matching |
| Sub Title (in English) | |
| Keyword(1) | indoor localization |
| Keyword(2) | signal subspace |
| Keyword(3) | subspace matching |
| Keyword(4) | antenna array |
| 1st Author's Name | Shohei IKEDA |
| 1st Author's Affiliation | Department of Computer and Information Science, Keio University() |
| 2nd Author's Name | Hiroyuki TSUJI |
| 2nd Author's Affiliation | National Institute of Information and Communications Technology |
| 3rd Author's Name | Tomoaki OHTSUKI |
| 3rd Author's Affiliation | Department of Computer and Information Science, Keio University |
| Date | 2007-11-08 |
| Paper # | RCS2007-99 |
| Volume (vol) | vol.107 |
| Number (no) | 306 |
| Page | pp.pp.- |
| #Pages | 5 |
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