| Presentation | 2009-12-18 Investigation on Multi-layer Reference Signal Using Two-Dimensional Orthogonal Codes in OFDMA Downlink Radio Access for LTE-Advanced Kazuaki Takeda, Yoshihisa Kishiyama, Motohiro Tanno, Takehiro Nakamura, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | This paper presents an investigation on a user-specific reference signal (US-RS) for multi-layer transmission in the LTE-Advanced downlink. In the LTE-Advanced downlink, to satisfy high-level performance requirements, advanced multiantenna transmission techniques such as higher-order single-user (SU)-MIMO, multi-user(MU)-MIMO, and coordinated multi-point transmission/reception (CoMP) are necessary. At the 3GPP RAN WG1 meeting, the US-RS was defined to support up to eight transmission layers, and a hybrid code division multiplexing (CDM) and frequency division multiplexing (FDM) scheme was adopted as a US-RS multiplexing scheme. In this paper, we propose a two-dimensional orthogonal cover code (2D-OCC) that achieves two-dimensional orthogonality in both the time and frequency domains to improve the performance of CDM-based US-RSs. Simulation results show that the 2D-OCC is effective in improving the block error rate (BLER) performance especially in a high mobility environment. Furthermore, we compare the US-RS mapping pattern in terms ofa localized/distributed CDM scheme employing the proposed 2D-OCC based on the throughput performance for multi-layer transmission in the LTEA-dvanced downlink. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | LTE-Advanced / multi-layer transmission / user-specific reference signal / two-dimensional orthogonal cover code |
| Paper # | RCS2009-187 |
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| Committee | RCS |
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| Conference Date | 2009/12/10(1days) |
| Place (in Japanese) | (See Japanese page) |
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| 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) | Investigation on Multi-layer Reference Signal Using Two-Dimensional Orthogonal Codes in OFDMA Downlink Radio Access for LTE-Advanced |
| Sub Title (in English) | |
| Keyword(1) | LTE-Advanced |
| Keyword(2) | multi-layer transmission |
| Keyword(3) | user-specific reference signal |
| Keyword(4) | two-dimensional orthogonal cover code |
| 1st Author's Name | Kazuaki Takeda |
| 1st Author's Affiliation | Radio Access Network Development Department, NTT DOCOMO, INC.() |
| 2nd Author's Name | Yoshihisa Kishiyama |
| 2nd Author's Affiliation | Radio Access Network Development Department, NTT DOCOMO, INC. |
| 3rd Author's Name | Motohiro Tanno |
| 3rd Author's Affiliation | Radio Access Network Development Department, NTT DOCOMO, INC. |
| 4th Author's Name | Takehiro Nakamura |
| 4th Author's Affiliation | Radio Access Network Development Department, NTT DOCOMO, INC. |
| Date | 2009-12-18 |
| Paper # | RCS2009-187 |
| Volume (vol) | vol.109 |
| Number (no) | 341 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |