Bearing and range estimation with an exact source-sensor spatial model

In sensor array processing literature, near-field bearing and range estimation algorithms generally use spherical wavefront to model only array sensors’ phase response (sometimes with Fresnel approximation) and assume equality in amplitude response. Ignoring the range dependent amplitudes, though fa...

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Veröffentlicht in:IET signal processing Jg. 14; H. 9; S. 614 - 623
Hauptverfasser: He, Jin, Li, Linna, Shu, Ting
Format: Journal Article
Sprache:Englisch
Veröffentlicht: The Institution of Engineering and Technology 01.12.2020
Schlagworte:
amplitude response
array sensor phase response
array signal processing
Cramer‐Rao bound
direction‐of‐arrival estimation
estimation ambiguity
near‐field bearing
near‐field sensor array
near‐field sinusoid sources
range dependent amplitudes
range estimation algorithm
Research Article
response vector
sensor array processing literature
source‐sensor spatial model
spherical wavefront amplitude
systematic estimation errors
vectors
array sensor phase response
near-field sensor array
estimation ambiguity
Cramer-Rao bound
amplitude response
direction-of-arrival estimation
sensor array processing literature
range dependent amplitudes
vectors
source-sensor spatial model
near-field bearing
range estimation algorithm
systematic estimation errors
response vector
spherical wavefront amplitude
near-field sinusoid sources
array signal processing
ISSN:1751-9675, 1751-9683, 1751-9683
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Beschreibung
Zusammenfassung:In sensor array processing literature, near-field bearing and range estimation algorithms generally use spherical wavefront to model only array sensors’ phase response (sometimes with Fresnel approximation) and assume equality in amplitude response. Ignoring the range dependent amplitudes, though facilitating the algorithmic development, will cause systematic estimation errors due to model mismatch. By taking the spherical wavefront amplitude into account, a new bearing and range estimation algorithm for locating multiple near-field sinusoid sources is presented. With the estimation of the near-field sensor array's response vector, closed-form formulas for bearing and range estimates are derived from its magnitude, or phase, or both. The problem of estimation ambiguity is discussed as well. Cramér-Rao bound is also derived to serve as a benchmark for performance study.
ISSN:1751-9675
1751-9683
1751-9683
DOI:10.1049/iet-spr.2020.0229