On the structure of the multi-mode filters for passive wavefront curvature ranging in a distributed array system

Hongya Ge, Ivars P. Kirsteins

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

2 Scopus citations

Abstract

This work presents some new results on the structures of, and our interpretation on, the multi-rank filters used for passive wavefront curvature (WFC) ranging. Such a WFC ranging systems uses a large-scale distributed arrays with many spatially separated modular arrays, operating under environments subject to a spatial coherence loss. Working on the modular array level beamformed data, the multi-rank filters along with the weighting coefficients provide further spatial filtering capability to rake in spatial coherence existing in the distorted wavefronts impinging on different modular arrays. Such multi-rank filters can improve ranging performance through different combining schemes, beyond what achieved by the bearing-only based triangulation. For a real-valued inter-module spatial coherence matrix, the derived multi-rank filters follow a nicely balanced structure comprised of in-phase and quadrature (I/Q) modes with varying spatial directions. The results provide a simple solution for us to discovering levels of coherence existing in different modes for multi-mode combining.

Original languageEnglish (US)
Title of host publication2013 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2013 - Proceedings
Pages3856-3860
Number of pages5
DOIs
StatePublished - Oct 18 2013
Event2013 38th IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2013 - Vancouver, BC, Canada
Duration: May 26 2013May 31 2013

Publication series

NameICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
ISSN (Print)1520-6149

Other

Other2013 38th IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2013
CountryCanada
CityVancouver, BC
Period5/26/135/31/13

All Science Journal Classification (ASJC) codes

  • Software
  • Signal Processing
  • Electrical and Electronic Engineering

Keywords

  • Asymptotic Results
  • Eigen-Modes
  • Large-Scale Array of Arrays
  • Passive Source Localization

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