Detecting and tracking abrupt changes in wireless multipath channels

We consider wireless multipath channels where abrupt changes may happen in the form of appearance/ disappearance of a new/existing path due to sudden changes in the environment. In this paper, we address the problem of estimating and tracking a channel whose taps may disappear/appear at random times...

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Bibliographic Details
Published in2012 Fourth International Conference on Communication Systems and Networks (COMSNETS 2012) pp. 1 - 10
Main Authors Sashidharan, V., Kannu, A. P.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.01.2012
Subjects
Change detection
Channel estimation
Channel modeling
Channel tracking
CUSUM Algorithm
Delay
Detectors
Equations
Kalman filtering
Kalman filters
Mathematical model
OFDM
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ISBN9781467302968
1467302961
ISSN2155-2487
DOI10.1109/COMSNETS.2012.6151342

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Summary:We consider wireless multipath channels where abrupt changes may happen in the form of appearance/ disappearance of a new/existing path due to sudden changes in the environment. In this paper, we address the problem of estimating and tracking a channel whose taps may disappear/appear at random times. We employ abrupt change detection algorithms and propose a scheme that uses a Kalman filter in parallel with a change detector. In order to reduce the computational complexity, our change detector is developed such that it operates using the outputs of Kalman filter. Through simulations, we compare the performance of change detector based algorithm with the conventional channel estimation algorithms.
ISBN:9781467302968
1467302961
ISSN:2155-2487
DOI:10.1109/COMSNETS.2012.6151342