Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)
- 2004.11c
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- Pages.265-267
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- 2004
A Consideration on the Identifiability for Blind Signal Separation in MIMO LTI Channels
MIMO LTI 채널에서의 블라인드 신호분리시의 식별성에 대한 고찰
Abstract
A blind separation problem in a multiple-input-multiple-output (MIMO) linear time-invariant (LTI) system with finite-alphabet inputs is considered. A discrete-time matrix equation model is used to describe the input-output relation of the system in order to make full use of the advantages of modern digital signal processing techniques. At first, ambiguity problem is investigated. Then, based on the results of the investigation, a new identifiability condition is proposed for the case of an input-data set which is widely used in digital communication. A probability bound such that an arbitrary input matrix satisfies the identifiability condition is derived. Finally, Monte-Carlo simulation is performed to demonstrate the validity of our suggestions.