Compressive Sensing Based Classification in the Presence of Intra-and Inter-Signal Correlation

Thakshila Wimalajeewa, Pramod K. Varshney

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

In this letter, we investigate the problem of classification with high-dimensional data using low-dimensional random projections in the presence of inter-and intra-signal correlations. Each sensor is assumed to compress its high-dimensional (Gaussian) signal vector using random projections in a multisensor setting. In order to quantify the classification performance with compressed data, we consider the Bhattacharya distance as the performance metric. In the presence of intra-signal correlation at a given sensor, the degradation in the Bhattacharya distance with compressed data is shown to be nonlinear with the compression ratio in contrast to the case when there is no intra-signal correlation. In the presence of inter-signal correlation, the degradation in the Bhattacharya distance with compressed data depends on whether or not an identical projection matrix is used to compress data at multiple sensors.

Original languageEnglish (US)
Article number8421014
Pages (from-to)1398-1402
Number of pages5
JournalIEEE Signal Processing Letters
Volume25
Issue number9
DOIs
StatePublished - Sep 2018

Keywords

  • Bhattacharya distance
  • classification
  • compressive sensing
  • correlated data

ASJC Scopus subject areas

  • Signal Processing
  • Electrical and Electronic Engineering
  • Applied Mathematics

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