Paper Abstract and Keywords |
Presentation |
2014-03-05 10:55
An Adaptive Dual-mode DFCE with Scattered Pilots for Fading Condition Sho Sumitani, Fumio Takahata (Waseda Univ.) RCS2013-378 |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
In an application of a dual-mode decision feedback channel estimation to a COFDM transmission with scattered pilot symbols, there would be three kinds of possible methods to process or select forward and backward channels estimated values. These are to average the values, to select one direction values from both direction values based on a path metric value of Viterbi decoding, and to select a value from values based on LLR (Log-Likelihood Ratio) value. Effective methods to obtain accurate estimated channel values in frequency and time directions depend on a fading condition characterized respectively by a delay spread and Doppler frequency. An exact detection of fading conditions requires a complicated signal processing for unstable and variable delay spread and Doppler frequency and is desirable to be removed from the channel estimation. The paper proposes a scheme to select an effective one from the three methods for frequency and time directions without a detection of fading conditions, which selects the methods based on path metric values. Computer simulation results show that the proposed approach provides the same channel estimation performance as that obtained under an exact detection of fading conditions. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
COFDM transmission / Dual-mode decision feedback channel estimation / Scattered pilot / Convolutional encoding/Viterbi decoding / Log-Likelihood Ratio / / / |
Reference Info. |
IEICE Tech. Rep., vol. 113, no. 456, RCS2013-378, pp. 437-442, March 2014. |
Paper # |
RCS2013-378 |
Date of Issue |
2014-02-24 (RCS) |
ISSN |
Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 |
Copyright and 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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RCS2013-378 |
Conference Information |
Committee |
RCS SR SRW |
Conference Date |
2014-03-03 - 2014-03-05 |
Place (in Japanese) |
(See Japanese page) |
Place (in English) |
Waseda Univ. |
Topics (in Japanese) |
(See Japanese page) |
Topics (in English) |
Mobile Communication Workshop |
Paper Information |
Registration To |
RCS |
Conference Code |
2014-03-RCS-SR-SRW |
Language |
Japanese |
Title (in Japanese) |
(See Japanese page) |
Sub Title (in Japanese) |
(See Japanese page) |
Title (in English) |
An Adaptive Dual-mode DFCE with Scattered Pilots for Fading Condition |
Sub Title (in English) |
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Keyword(1) |
COFDM transmission |
Keyword(2) |
Dual-mode decision feedback channel estimation |
Keyword(3) |
Scattered pilot |
Keyword(4) |
Convolutional encoding/Viterbi decoding |
Keyword(5) |
Log-Likelihood Ratio |
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1st Author's Name |
Sho Sumitani |
1st Author's Affiliation |
Waseda University (Waseda Univ.) |
2nd Author's Name |
Fumio Takahata |
2nd Author's Affiliation |
Waseda University (Waseda Univ.) |
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Speaker |
Author-1 |
Date Time |
2014-03-05 10:55:00 |
Presentation Time |
20 minutes |
Registration for |
RCS |
Paper # |
RCS2013-378 |
Volume (vol) |
vol.113 |
Number (no) |
no.456 |
Page |
pp.437-442 |
#Pages |
6 |
Date of Issue |
2014-02-24 (RCS) |
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