講演名 2019-04-19
Blind Source Separation in Nonlinear Mixture: Separation and a Multi-Subspace Representation
Lu Wang(慶大), 大槻 知明(慶大),
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抄録(和)
抄録(英) The process deals with blind source separation in the nonlinear domain is to estimate the original signals or mixture functions from the degraded signals, without any prior information about the mixing functions. The fundamental problem is to recover the original sources by estimating an approximation function under such assumptions so as to estimate the inverse of mixing functions. However, in practice, the approximation function is derived from some estimation algorithm with a finite sample size that even larger estimation error appears with improper model construction. In this paper, we work on the convergence and asymptotic analysis of the separation approach, where the nonlinearity of the mixture function is extracted by the flexible approximation and the nonlinear problem is solved linearly in the feature space. The analysis stems from the performance of a mismatched estimator that accesses the finite sample size. By providing a closed-form expression of the mean squared error (MSE), we can present a novel algebraic formalization as well as derive an upper bound on the estimation error. The simulation results show that if the nonlinearity of mixing functions can be extracted by the flexible approximation, the consistency of numerical MSE and analytical MSE can be achieved as the sample size tends to be infinity. This implies that the algorithm is feasible to separate the distortion of the nonlinear mixture.
キーワード(和)
キーワード(英) Nonlinear blind source separationmulti-subspace representationnonlinear mixturekernel mappingtime-frequency representation
資料番号 RCS2019-16
発行日 2019-04-11 (RCS)

研究会情報
研究会 RCS
開催期間 2019/4/18(から2日開催)
開催地(和) 登別グランドホテル
開催地(英) Noboribetsu Grand Hotel
テーマ(和) 鉄道,車車間・路車間通信,無線アクセス技術,一般
テーマ(英) Railroad Communications, Inter-Vehicle Communications, Road to Vehicle Communications, Radio Access Technologies, Wireless Communications, etc.
委員長氏名(和) 大槻 知明(慶大)
委員長氏名(英) Tomoaki Otsuki(Keio Univ.)
副委員長氏名(和) 福田 英輔(富士通研) / 須山 聡(NTTドコモ) / 前原 文明(早大)
副委員長氏名(英) Eisuke Fukuda(Fujitsu Labs.) / Satoshi Suyama(NTT Docomo) / Fumiaki Maehara(Waseda Univ.)
幹事氏名(和) 西村 寿彦(北大) / 石原 浩一(NTT)
幹事氏名(英) Toshihiko Nishimura(Hokkaido Univ.) / Koichi Ishihara(NTT)
幹事補佐氏名(和) 村岡 一志(NTTドコモ) / 衣斐 信介(阪大) / 西本 浩(三菱電機) / 安達 宏一(電通大) / 中村 理(シャープ)
幹事補佐氏名(英) Kazushi Muraoka(NTT DocomoO) / Shinsuke Ibi(Osaka Univ.) / Hiroshi Nishimoto(Mitsubishi Electric) / Koichi Adachi(Univ. of Electro-Comm.) / Osamu Nakamura(Sharp)

講演論文情報詳細
申込み研究会 Technical Committee on Radio Communication Systems
本文の言語 ENG
タイトル(和)
サブタイトル(和)
タイトル(英) Blind Source Separation in Nonlinear Mixture: Separation and a Multi-Subspace Representation
サブタイトル(和)
キーワード(1)(和/英) / Nonlinear blind source separationmulti-subspace representationnonlinear mixturekernel mappingtime-frequency representation
第 1 著者 氏名(和/英) Lu Wang / Lu Wang
第 1 著者 所属(和/英) 慶應義塾大学(略称:慶大)
Keio Univeristy(略称:Keio Univ.)
第 2 著者 氏名(和/英) 大槻 知明 / Tomoaki Ohtsuki
第 2 著者 所属(和/英) 慶應義塾大学(略称:慶大)
Keio Univeristy(略称:Keio Univ.)
発表年月日 2019-04-19
資料番号 RCS2019-16
巻番号(vol) vol.119
号番号(no) RCS-8
ページ範囲 pp.73-78(RCS),
ページ数 6
発行日 2019-04-11 (RCS)