Bearing Estimation via Spatial Sparsity using Compressive Sensing

Bearing estimation algorithms obtain only a small number of direction of arrivals (DOAs) within the entire angle domain, when the sources are spatially sparse. Hence, we propose a method to specifically exploit this spatial sparsity property. The method uses a very small number of measurements in th...

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Veröffentlicht in:IEEE transactions on aerospace and electronic systems 2012-04, Vol.48 (2), p.1358-1369
Hauptverfasser: Gurbuz, A. C., Cevher, V., Mcclellan, J. H.
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Mcclellan, J. H.
description Bearing estimation algorithms obtain only a small number of direction of arrivals (DOAs) within the entire angle domain, when the sources are spatially sparse. Hence, we propose a method to specifically exploit this spatial sparsity property. The method uses a very small number of measurements in the form of random projections of the sensor data along with one full waveform recording at one of the sensors. A basis pursuit strategy is used to formulate the problem by representing the measurements in an over complete dictionary. Sparsity is enforced by ℓ 1 -norm minimization which leads to a convex optimization problem that can be efficiently solved with a linear program. This formulation is very effective for decreasing communication loads in multi sensor systems. The algorithm provides increased bearing resolution and is applicable for both narrowband and wideband signals. Sensors positions must be known, but the array shape can be arbitrary. Simulations and field data results are provided to demonstrate the performance and advantages of the proposed method.
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subjects Algorithms
Arrays
Bearing
Computer simulation
Correlation
Dictionaries
Direction of arrival estimation
Minimization
Noise
Optimization
Recording
Sensors
Sparsity
Studies
Vectors
Waveforms
title Bearing Estimation via Spatial Sparsity using Compressive Sensing
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