講演抄録/キーワード |
講演名 |
2008-01-25 11:20
MIMO-STBCにおける双方向判定帰還チャネル推定方式 ○早川敬一郎・三田勝史・伊藤修朗(豊田中研)・石神裕丈・岩波保則・岡本英二(名工大) SIP2007-170 RCS2007-173 |
抄録 |
(和) |
予防安全を目的とする車車間通信においては非常に高い信頼性が求められる.しかし,車車間通信の環境では自車の動きや周囲の環境変化により伝搬路変動が激しいため,送受信機間の伝搬路を推定し,補償を行う技術が必要となる.本稿では,MIMO時空間符号化(MIMO-STBC)システムにおいて,双方向判定帰還チャネル推定方式を適用することを提案する.提案方式では,過去の受信データを用いて現在の伝搬路を推定する従来の順方向判定帰還チャネル推定と,現在の受信データから過去の伝搬路を推定する逆方向判定帰還チャネル推定を行い,信頼度の高い推定値を選択して用いることで,チャネル推定精度の向上を図っている.双方向の推定結果を比較するための信頼度を求める3種類の手法を提案し,計算機シミュレーションにより,提案方式の有効性を検証する. |
(英) |
In recent years, extremely high-reliability systems are desired for inter-vehicle communications. In the environmental of inter-vehicle communications, channel states between transmitter and receiver change intensively, because of the motion of cars in various surroundings. So we have to estimate and utilize the channel state information accurately. In this paper, we have proposed the channel state information scheme for MIMO-STBC systems, using bi-directional decision feedback. In the proposed scheme, inverse decision feedback scheme, in which the past channel states are estimated from present received data, are applied to estimate channel states in addition to ordinary decision feedback scheme, in which the present channel states are estimated from past received data. Those two estimated channel states are compared and the one which is more reliable is used for STBC decoding. Three methods for calculating the reliability of channel state estimation have been proposed and effectiveness of the proposed channel estimation scheme has been made clear through computer simulation results. |
キーワード |
(和) |
MIMO / STBC / 判定帰還 / チャネル推定 / 移動通信 / ITS / / |
(英) |
MIMO / STBC / Decision Feedback / Channel State Estimation / Mobile Communication / ITS / / |
文献情報 |
信学技報, vol. 107, no. 441, RCS2007-173, pp. 73-78, 2008年1月. |
資料番号 |
RCS2007-173 |
発行日 |
2008-01-18 (SIP, RCS) |
ISSN |
Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 |
著作権に ついて |
技術研究報告に掲載された論文の著作権は電子情報通信学会に帰属します.(許諾番号:10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) |
PDFダウンロード |
SIP2007-170 RCS2007-173 |
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