- 著者
-
KAWAMOTO Mitsuru
MATSUOKA Kiyotoshi
OYA Masahiro
- 出版者
- 一般社団法人電子情報通信学会
- 雑誌
- IEICE transactions on fundamentals of electronics, communications and computer sciences (ISSN:09168508)
- 巻号頁・発行日
- vol.80, no.4, pp.695-704, 1997-04-25
- 被引用文献数
-
5
This paper proposes a new method for recovering the original signals from their linear mixtures observed by the same number of sensors. It is performed by identifying the linear transform from the sources to the sensors, only using the sensor signals. The only assumption on the source signals is basically the fact that they are statistically mutually independent. In order to perform the 'blind' identification, some time-correlational information in the observed signals are utilized. The most important feature of the method is that the full information of available time-correlation data (second-order statistics) is evaluated, as opposed to the conventional methods. To this end, an information-theoretic cost function is introduced, and the unknown linear transform is found by minimizing it. The proposed method gives a more stable solution than the conventional methods.