Inlämning av Examensarbete / Submission of Thesis

Magnus Berg; Erik Bondesson 74, pp. 85. TEK/avd. för signalbehandling, 2005.

The work

Författare / Author: Magnus Berg, Erik Bondesson,
Titel / Title: Real-Time Implementation of a Combined PCA-ICA Algorithm for Blind Source Separation
Abstrakt Abstract:

In this thesis we introduce and investigate a method combining Principle Component Analysis (PCA) and Independent Component Analysis (ICA) for Blind Source Separation (BSS). A recursive method for the PCA is applied to meet the demands of a real-time application, and for the ICA algorithm, the Information maximization principle is used. In an effort to address convolutive BSS, the separation is performed in the frequency domain. By doing so, the problem reduces to the simple stantaneous case, and existing instantaneous BSS model can be used. However, frequency domain BSS is subject to both permutation and scaling ambiguities. This thesis examines several methods to solve these problems, like Direction Of Arrival (DOA) and the Kurtosis. Furthermore, results are presented based on Matlab simulations as well as from a real-time implementation.
Evaluations show that the combined PCA-ICA algorithm outperforms both the PCA and ICA alone. The algorithm was also successfully implemented in real-time with comparable noise suppression capability compared to Matlab implementation. Future work which include ways to improve efficiency of the algorithms is also discussed.

Ämnesord / Subject: Signalbehandling - Signal Processing

Nyckelord / Keywords: PCA, ICA, BSS, Permutation, DOA, Kurtosis

Publication info

Dokument id / Document id:
Program:/ Programme Magisterprogram i Elektroteknik / Master of Science in Electrical Engineering
Registreringsdatum / Date of registration: 10/20/2005
Uppsatstyp / Type of thesis: D-Uppsats/Magister/Master


Handledare / Supervisor: Sven Nordholm
Examinator / Examiner: Ingvar Claesson
Organisation / Organisation: Blekinge Institute of Technology
Institution / School: TEK/avd. för signalbehandling
S-372 25 Ronneby
+46 455 38 50 00
I samarbete med / In co-operation with: Western Australian Telecommunications Research Institute
Anmärkningar / Comments:

Magnus Berg 070-55 01 406

Files & Access

Bifogad uppsats fil(er) / Files attached: rapport.pdf (2495 kB, öppnas i nytt fönster)