Near-field channel estimation is recast as multidimensional polynomial phase estimation via spherical wavefront parameterization, enabling a new estimator with improved accuracy-complexity performance.
Channel estimation for extremely large-scale MIMO: Far-field or near-field?
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Fixing arc length, curving a large array shrinks its near-field region in front but grows it to the sides, and a learned AMP estimator recovers non-stationary near-field channels for arbitrary geometries.
A tensor-based multi-stage channel estimation method for XL-CRIS-aided mmWave MIMO-NOMA systems that maintains angle-invariant near-field properties under beam squint.
citing papers explorer
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Near-field channel estimation via wavefront parameterization
Near-field channel estimation is recast as multidimensional polynomial phase estimation via spherical wavefront parameterization, enabling a new estimator with improved accuracy-complexity performance.
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Near-Field Communications with Different Array Geometries: Rayleigh Distance, Channel Estimation, and Transmission Design
Fixing arc length, curving a large array shrinks its near-field region in front but grows it to the sides, and a learned AMP estimator recovers non-stationary near-field channels for arbitrary geometries.
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Near-Field Channel Estimation for Extremely Large-Scale Circular RIS-Aided mmWave MIMO-NOMA System with Beam Squint Effect
A tensor-based multi-stage channel estimation method for XL-CRIS-aided mmWave MIMO-NOMA systems that maintains angle-invariant near-field properties under beam squint.