| Paper Abstract and Keywords |
| Presentation |
2006-07-20 17:00
A Study on Channel Estimation using EM algorithm for OFDM System in Time-Varying Multi-Path Channels
-- Path Models and Estimation Accuracy --
Akihiro Waku (Tokyo Univ. of Science), Masahiro Fujii (Utsunomiya Univ.), Makoto Itami, Kohji Itoh (Tokyo Univ. of Science) |
| Abstract |
(in Japanese) |
(See Japanese page) |
| (in English) |
In OFDM mobile communication with high-speed vehicle, due to the effect of large multi-path doppler shifts varying independently of the paths, the time allowed to the conventional methods of estimation of the channel characteristics is severally limited without separate estimate of the doppler shifts.
As a result, the quality of performance of the data demodulation using the estimates insufficiently smoothed of the noise remained low. This report proposes, using DFT and EM algorithm, a novel method of simultaneously estimating the doppler shifts and the complex amplitudes of the path-wise channel responses. The results of computer simulation show capability of he method much superior to the conventional method. |
| Keyword |
(in Japanese) |
(See Japanese page) |
| (in English) |
OFDM / Channel Estimation / Pilot Symbol / DFT / Doppler Frequency / EM Algorithm / / |
| Reference Info. |
IEICE Tech. Rep., vol. 106, no. 171, WBS2006-17, pp. 53-58, July 2006. |
| Paper # |
WBS2006-17 |
| Date of Issue |
2006-07-13 (SIP, WBS) |
| ISSN |
Print edition: ISSN 0913-5685 |
| Download PDF |
|
| Conference Information |
| Committee |
SIP WBS |
| Conference Date |
2006-07-20 - 2006-07-21 |
| Place (in Japanese) |
(See Japanese page) |
| Place (in English) |
Nagaoka Univ. of Tech. |
| Topics (in Japanese) |
(See Japanese page) |
| Topics (in English) |
Signal Processing, Wideband Systems, etc. |
| Paper Information |
| Registration To |
WBS |
| Conference Code |
2006-07-SIP-WBS |
| Language |
Japanese |
| Title (in Japanese) |
(See Japanese page) |
| Sub Title (in Japanese) |
(See Japanese page) |
| Title (in English) |
A Study on Channel Estimation using EM algorithm for OFDM System in Time-Varying Multi-Path Channels |
| Sub Title (in English) |
Path Models and Estimation Accuracy |
| Keyword(1) |
OFDM |
| Keyword(2) |
Channel Estimation |
| Keyword(3) |
Pilot Symbol |
| Keyword(4) |
DFT |
| Keyword(5) |
Doppler Frequency |
| Keyword(6) |
EM Algorithm |
| Keyword(7) |
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| Keyword(8) |
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| 1st Author's Name |
Akihiro Waku |
| 1st Author's Affiliation |
Tokyo University of Science (Tokyo Univ. of Science) |
| 2nd Author's Name |
Masahiro Fujii |
| 2nd Author's Affiliation |
Utsunomiya University (Utsunomiya Univ.) |
| 3rd Author's Name |
Makoto Itami |
| 3rd Author's Affiliation |
Tokyo University of Science (Tokyo Univ. of Science) |
| 4th Author's Name |
Kohji Itoh |
| 4th Author's Affiliation |
Tokyo University of Science (Tokyo Univ. of Science) |
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| Speaker |
Author-1 |
| Date Time |
2006-07-20 17:00:00 |
| Presentation Time |
25 minutes |
| Registration for |
WBS |
| Paper # |
SIP2006-53, WBS2006-17 |
| Volume (vol) |
vol.106 |
| Number (no) |
no.169(SIP), no.171(WBS) |
| Page |
pp.53-58 |
| #Pages |
6 |
| Date of Issue |
2006-07-13 (SIP, WBS) |