| Paper Abstract and Keywords |
| Presentation |
2004-07-22 16:10
フィードフォワード形及びフィードバック形BSSの収束性に関する比較
Akihide Horita, Yasuhiro Dejima, Kenji Nakayama, Akihiro Hirano (Kanazawa Univ.) |
| Abstract |
(in Japanese) |
(See Japanese page) |
| (in English) |
This paper analyzes and compares signal separation, convergence speed and signal distortion in both a feedforward blind source separation (BSS) and a feedback BSS. Let the observed signals and the output signals be $x_i$ and $y_i$, respectively. In the feedback BSS, the transfer functions from $x_i$ to $y_i$ are all 1, and the feedback paths are adjusted so as to cancel the interference. Therefore, signal distortion does not occur after signal separation under some conditions. On the other hands, in the feedforward BSS, all paths from the observations to the outputs are adjusted. There exist some degree of freedom besides to achieve signal separation. This freedom causes signal distortion. In this paper, two kinds of feedforward BSSs in the frequency domain are taken into account. One of them is based on natural gradient method, and the other is an improved method, in which some constraint is removed. The feedforward BSS based on the natural gradient method causes sever signal distortion. The other two methods have almost the same performances on signal separation and convergence speed. Regarding signal distortion, the feedback BSS shows slightly good performance. |
| Keyword |
(in Japanese) |
(See Japanese page) |
| (in English) |
Blind signal source separation / Signal distortion / Feedforward / Feedback / Convergence property / / / |
| Reference Info. |
IEICE Tech. Rep., vol. 104, no. 214, SIP2004-44, pp. 57-62, July 2004. |
| Paper # |
SIP2004-44 |
| Date of Issue |
2004-07-15 (WBS, SIP) |
| ISSN |
Print edition: ISSN 0913-5685 |
| Download PDF |
|
| Conference Information |
| Committee |
WBS SIP |
| Conference Date |
2004-07-22 - 2004-07-23 |
| Place (in Japanese) |
(See Japanese page) |
| Place (in English) |
NICO PLAZA, Niigata |
| Topics (in Japanese) |
(See Japanese page) |
| Topics (in English) |
|
| Paper Information |
| Registration To |
SIP |
| Conference Code |
2004-07-WBS-SIP |
| Language |
Japanese |
| Title (in Japanese) |
(See Japanese page) |
| Sub Title (in Japanese) |
(See Japanese page) |
| Title (in English) |
フィードフォワード形及びフィードバック形BSSの収束性に関する比較 |
| Sub Title (in English) |
|
| Keyword(1) |
Blind signal source separation |
| Keyword(2) |
Signal distortion |
| Keyword(3) |
Feedforward |
| Keyword(4) |
Feedback |
| Keyword(5) |
Convergence property |
| Keyword(6) |
|
| Keyword(7) |
|
| Keyword(8) |
|
| 1st Author's Name |
Akihide Horita |
| 1st Author's Affiliation |
Kanazawa University (Kanazawa Univ.) |
| 2nd Author's Name |
Yasuhiro Dejima |
| 2nd Author's Affiliation |
Kanazawa University (Kanazawa Univ.) |
| 3rd Author's Name |
Kenji Nakayama |
| 3rd Author's Affiliation |
Kanazawa University (Kanazawa Univ.) |
| 4th Author's Name |
Akihiro Hirano |
| 4th Author's Affiliation |
Kanazawa University (Kanazawa Univ.) |
| 5th Author's Name |
|
| 5th Author's Affiliation |
() |
| 6th Author's Name |
|
| 6th Author's Affiliation |
() |
| 7th Author's Name |
|
| 7th Author's Affiliation |
() |
| 8th Author's Name |
|
| 8th Author's Affiliation |
() |
| 9th Author's Name |
|
| 9th Author's Affiliation |
() |
| 10th Author's Name |
|
| 10th Author's Affiliation |
() |
| 11th Author's Name |
|
| 11th Author's Affiliation |
() |
| 12th Author's Name |
|
| 12th Author's Affiliation |
() |
| 13th Author's Name |
|
| 13th Author's Affiliation |
() |
| 14th Author's Name |
|
| 14th Author's Affiliation |
() |
| 15th Author's Name |
|
| 15th Author's Affiliation |
() |
| 16th Author's Name |
|
| 16th Author's Affiliation |
() |
| 17th Author's Name |
|
| 17th Author's Affiliation |
() |
| 18th Author's Name |
|
| 18th Author's Affiliation |
() |
| 19th Author's Name |
|
| 19th Author's Affiliation |
() |
| 20th Author's Name |
|
| 20th Author's Affiliation |
() |
| Speaker |
Author-1 |
| Date Time |
2004-07-22 16:10:00 |
| Presentation Time |
25 minutes |
| Registration for |
SIP |
| Paper # |
WBS2004-25, SIP2004-44 |
| Volume (vol) |
vol.104 |
| Number (no) |
no.216(WBS), no.214(SIP) |
| Page |
pp.57-62 |
| #Pages |
6 |
| Date of Issue |
2004-07-15 (WBS, SIP) |
|