Interference Mitigation in Blind Source Separation by Hidden State Filtering

Anushreya Ghosh, Alexander M. Haimovich, Jason A. Dabin

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

Radio frequency (RF) sources are observed by a uniform linear array (ULA) in the presence of interference. The activity of the sources of interest is sparse, intermittent and assumed to follow a hidden Markov model (HMM). The interfering jammer is active during the entire period of observation. Blind Source Separation (BSS) is performed using direction of arrival (DOA) as criterion of separating the sources as well as the jammer. It is shown that an interfering jammer has a deleterious effect on the performance of the BSS. Leveraging the HMM activity model of the sources, a method is proposed to mitigate the effect of an interfering jammer. The proposed method is essentially a state filtering technique, and it is referred to as Hidden State Filtering (HSF). Two different HSF methods are introduced and compared. The HSF concept is extended to include estimating the HMM model parameters from the observed data. Numerical results demonstrate that the proposed approach is capable of mitigating the effects of interference and enhance source separation.

Original languageEnglish (US)
Title of host publication2023 57th Annual Conference on Information Sciences and Systems, CISS 2023
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781665451819
DOIs
StatePublished - 2023
Event57th Annual Conference on Information Sciences and Systems, CISS 2023 - Baltimore, United States
Duration: Mar 22 2023Mar 24 2023

Publication series

Name2023 57th Annual Conference on Information Sciences and Systems, CISS 2023

Conference

Conference57th Annual Conference on Information Sciences and Systems, CISS 2023
Country/TerritoryUnited States
CityBaltimore
Period3/22/233/24/23

All Science Journal Classification (ASJC) codes

  • Computer Science Applications
  • Hardware and Architecture
  • Information Systems
  • Artificial Intelligence
  • Information Systems and Management
  • Safety, Risk, Reliability and Quality

Keywords

  • Blind Source Separation
  • Direction of Arrival
  • Hidden Markov Model
  • Jammer
  • Sparse Representation

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