Paper Abstract and Keywords |
Presentation |
2005-10-21 09:00
A Study on Downlink Transmit Diversity Using Block Weight in TDD/MC-CDMA Junichi Sato, Yoshinobu Kajikawa, Yasuo Nomura (Kansai Univ.) |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
This paper proposes a novel transmit diversity system at down-link in TDD/MC-CDMA. In the conventional MC-CDMA transmit diversity system, the orthogonality of the spread code is lost and then the BER performance deteriorates in downlink because the data symbols of multiple users are multiplexed by adding the different weights for each subcarrier from many antennas. The proposed system therefore considers transmit weighting and multiplexing schemes based on careful study of the orthogonality of spreading code. In the proposed scheme, loss of the orthogonality of spread code can be prevented and the transmission performance can be improved by dividing the spreading code into some blocks according to the transmission channel environment and adding the same weight. Moreover, many data symbols can be transmitted simultaneously by increasing the number of divisions of spreading code, and the transmission efficiency can be consequently improved. Simulation results demonstrate that the proposed scheme can improve the BER performance and the transmission efficiency. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
MC-CDMA / Transmit Diversity / Frequency Selective Fading / / / / / |
Reference Info. |
IEICE Tech. Rep., vol. 105, no. 356, RCS2005-96, pp. 67-72, Oct. 2005. |
Paper # |
RCS2005-96 |
Date of Issue |
2005-10-13 (RCS) |
ISSN |
Print edition: ISSN 0913-5685 |
Download PDF |
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Conference Information |
Committee |
AP RCS |
Conference Date |
2005-10-20 - 2005-10-21 |
Place (in Japanese) |
(See Japanese page) |
Place (in English) |
Akita Prefectural Univ. |
Topics (in Japanese) |
(See Japanese page) |
Topics (in English) |
Adaptive Antenna, MIMO, RF Signal Processing etc. |
Paper Information |
Registration To |
RCS |
Conference Code |
2005-10-AP-RCS |
Language |
Japanese |
Title (in Japanese) |
(See Japanese page) |
Sub Title (in Japanese) |
(See Japanese page) |
Title (in English) |
A Study on Downlink Transmit Diversity Using Block Weight in TDD/MC-CDMA |
Sub Title (in English) |
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Keyword(1) |
MC-CDMA |
Keyword(2) |
Transmit Diversity |
Keyword(3) |
Frequency Selective Fading |
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1st Author's Name |
Junichi Sato |
1st Author's Affiliation |
Kansai University (Kansai Univ.) |
2nd Author's Name |
Yoshinobu Kajikawa |
2nd Author's Affiliation |
Kansai University (Kansai Univ.) |
3rd Author's Name |
Yasuo Nomura |
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Kansai University (Kansai Univ.) |
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Speaker |
Author-1 |
Date Time |
2005-10-21 09:00:00 |
Presentation Time |
25 minutes |
Registration for |
RCS |
Paper # |
RCS2005-96 |
Volume (vol) |
vol.105 |
Number (no) |
no.356 |
Page |
pp.67-72 |
#Pages |
6 |
Date of Issue |
2005-10-13 (RCS) |