| Presentation | 2008-10-22 Considerations on the scrambling for Evolved UTRA uplink control channel Seigo NAKAO, Tomohumi TAKATA, Daichi IMAMURA, Katsuhiko HIRAMATSU, Kazuyuki Miya, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | HARQ (Hybrid Automatic Repeat Request) is employed for the 3GPP E-UTRA downlink. The ACK/NACK signals from each mobile terminal are multiplexed by means of CDMA (Code Division Multiple Access) and transmitted via PUCCH (Physical Uplink Control CHannel). The ACK/NACK signals are code spread by the cyclic shift CAZAC (Constant Amplitude Zero Auto-Correlation) sequences, however, the orthogonality of these sequences is not guaranteed and the amount of the inter-code interference depends on the delay spread of the channel and the transmission timing control error of each UE. In the conventional PUCCH structure, the interference between two ACK signals does not degrade the detection performance of them although the interference between an ACK signal and a NACK signal degrades the detection performance. This causes a serious detection performance gap between the ACK signals and the NACK signals since there are more ACK signals in PUCCH than NACK signals in general cases. In this paper, we propose a novel scrambling structure for PUCCH which can solve the detection performance gap between the ACK signals and the NACK signals, and simulation evaluations show the proposed scrambling structure can significantly improve the detection performance of the NACK signals via PUCCH. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Cyclic shift sequence / CDMA / Inter-code interference / Scrambling / HARQ / ACK/NACK / Uplink control channel |
| Paper # | RCS2008-112 |
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| Committee | RCS |
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| Conference Date | 2008/10/15(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) | Considerations on the scrambling for Evolved UTRA uplink control channel |
| Sub Title (in English) | |
| Keyword(1) | Cyclic shift sequence |
| Keyword(2) | CDMA |
| Keyword(3) | Inter-code interference |
| Keyword(4) | Scrambling |
| Keyword(5) | HARQ |
| Keyword(6) | ACK/NACK |
| Keyword(7) | Uplink control channel |
| 1st Author's Name | Seigo NAKAO |
| 1st Author's Affiliation | Next-Generation Mobile Communications Development Center, Panasonic Corporation() |
| 2nd Author's Name | Tomohumi TAKATA |
| 2nd Author's Affiliation | Panasonic Mobile Communications R & D Lab. Co., Ltd. |
| 3rd Author's Name | Daichi IMAMURA |
| 3rd Author's Affiliation | Next-Generation Mobile Communications Development Center, Panasonic Corporation |
| 4th Author's Name | Katsuhiko HIRAMATSU |
| 4th Author's Affiliation | Overseas R & D Promotion Center, Panasonic Corporation |
| 5th Author's Name | Kazuyuki Miya |
| 5th Author's Affiliation | Panasonic Mobile Communications R & D Lab. Co., Ltd. |
| Date | 2008-10-22 |
| Paper # | RCS2008-112 |
| Volume (vol) | vol.108 |
| Number (no) | 249 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |