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Paper Abstract and Keywords
Presentation 2008-10-22 16:30
Considerations on the scrambling for Evolved UTRA uplink control channel
Seigo Nakao (Panasonic), Tomohumi Takata (Panasonic Mobile Communications R&D Lab. Co., Ltd.), Daichi Imamura, Katsuhiko Hiramatsu (Panasonic), Kazuyuki Miya (Panasonic Mobile Communications R&D Lab. Co., Ltd.) RCS2008-112
Abstract (in Japanese) (See Japanese page) 
(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) 
(in English) Cyclic shift sequence / CDMA / Inter-code interference / Scrambling / HARQ / ACK/NACK / Uplink control channel /  
Reference Info. IEICE Tech. Rep., vol. 108, no. 249, RCS2008-112, pp. 55-60, Oct. 2008.
Paper # RCS2008-112 
Date of Issue 2008-10-15 (RCS) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
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reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
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Conference Information
Committee SR RCS USN AN  
Conference Date 2008-10-22 - 2008-10-24 
Place (in Japanese) (See Japanese page) 
Place (in English) Okinawa industry support center 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Wireless discributed network special session and general session 
Paper Information
Registration To RCS 
Conference Code 2008-10-SR-RCS-USN-AN 
Language Japanese 
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  
Keyword(8)  
1st Author's Name Seigo Nakao  
1st Author's Affiliation Panasonic Corporation (Panasonic)
2nd Author's Name Tomohumi Takata  
2nd Author's Affiliation Panasonic Mobile Communications R&D Lab. Co., Ltd. (Panasonic Mobile Communications R&D Lab. Co., Ltd.)
3rd Author's Name Daichi Imamura  
3rd Author's Affiliation Panasonic Corporation (Panasonic)
4th Author's Name Katsuhiko Hiramatsu  
4th Author's Affiliation Panasonic Corporation (Panasonic)
5th Author's Name Kazuyuki Miya  
5th Author's Affiliation Panasonic Mobile Communications R&D Lab. Co., Ltd. (Panasonic Mobile Communications R&D Lab. Co., Ltd.)
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Speaker Author-1 
Date Time 2008-10-22 16:30:00 
Presentation Time 20 minutes 
Registration for RCS 
Paper # RCS2008-112 
Volume (vol) vol.108 
Number (no) no.249 
Page pp.55-60 
#Pages 6 
Date of Issue 2008-10-15 (RCS) 

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