| Presentation | 2008-03-07 Pilot signal generation scheme using frequency dependent cyclic shift sequence for inter-cell interference reduction Yoshihiko OGAWA, Tomohumi TAKATA, Takashi IWAI, Daichi IMAMURA, Katsuhiko HIRAMATSU, Kazuyuki Miya, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | SC-FDMA (Single-Carrier Frequency Division Multiplexing Access) for the access method and the cyclic shift ZC (Zadoff Chu) sequence for the pilot signal are employed in 3GPP E-UTRA Uplink. The cyclic shift ZC sequence is the orthogonal sequence which shifted ZC sequence cyclically in time domain. In E-UTRA system, the uplink employs FDMA method which allocates the different transmission band to each UE (User equipment). So, there are cases when the frequency bands among cells are overlapped partially assuming that the frequencies reuse is 1. At this time, the orthogonality of them is collapsed and the interference among sequences occurs. Therefore we propose a frequency dependent cyclic shift sequence, which can reduce the interference among sequences by allocating the same index of the cyclic shift sequence to the overlapped sub-carrier. In details, the common sub-carrier among cells with synchronization of the frame timing is set, and the relation between the index of the cyclic shift sequence and the sub-carrier are mapped 1 to 1. Simulation evaluation shows the proposed method can improve the estimation accuracy and improve the receiver performance by 4dB compared to conventional method. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Cyclic Shift Sequence / Band offset / Base sub-carrier / Inter-cell interference / FDMA / Pilot Signal / Uplink |
| Paper # | RCS2007-243 |
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| Conference Information | |
| Committee | RCS |
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| Conference Date | 2008/2/27(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) | Pilot signal generation scheme using frequency dependent cyclic shift sequence for inter-cell interference reduction |
| Sub Title (in English) | |
| Keyword(1) | Cyclic Shift Sequence |
| Keyword(2) | Band offset |
| Keyword(3) | Base sub-carrier |
| Keyword(4) | Inter-cell interference |
| Keyword(5) | FDMA |
| Keyword(6) | Pilot Signal |
| Keyword(7) | Uplink |
| 1st Author's Name | Yoshihiko OGAWA |
| 1st Author's Affiliation | Next-Generation Mobile Communications Development Center Matsushita Electric Industrial Co., Ltd.() |
| 2nd Author's Name | Tomohumi TAKATA |
| 2nd Author's Affiliation | Panasonic Mobile Communications R&D Lab. Co., Ltd. |
| 3rd Author's Name | Takashi IWAI |
| 3rd Author's Affiliation | Panasonic Mobile Communications R&D Lab. Co., Ltd. |
| 4th Author's Name | Daichi IMAMURA |
| 4th Author's Affiliation | Next-Generation Mobile Communications Development Center Matsushita Electric Industrial Co., Ltd. |
| 5th Author's Name | Katsuhiko HIRAMATSU |
| 5th Author's Affiliation | Next-Generation Mobile Communications Development Center Matsushita Electric Industrial Co., Ltd. |
| 6th Author's Name | Kazuyuki Miya |
| 6th Author's Affiliation | Panasonic Mobile Communications R&D Lab. Co., Ltd. |
| Date | 2008-03-07 |
| Paper # | RCS2007-243 |
| Volume (vol) | vol.107 |
| Number (no) | 518 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |