Direction Finding by Covariance Matrix Sparse Representation With Sensor Gain and Phase Uncertainties in Unknown Non-Uniform Noise.
Yunfei FangShengqi ZhuYongchan GaoPublished in: IEEE Wirel. Commun. Lett. (2021)
Keyphrases
- covariance matrix
- sparse representation
- dictionary learning
- covariance matrices
- sparse coding
- face recognition
- principal component analysis
- estimation error
- compressive sensing
- reconstruction error
- random projections
- sample size
- signal processing
- image classification
- image representation
- positive definite
- gaussian mixture
- noise level
- noise model
- missing data
- image patches
- high dimensional data
- dimensionality reduction
- correlation matrix
- objective function
- computer vision
- negative matrix factorization
- data sets
- maximum likelihood
- high dimensional
- sparse coefficients