4 papers
Joint Activity Detection and Channel Estimation for Massive Random Access Using SBL and SCA
Esa Ollila, Majdoddin Esfandiari, Daniel P. Palomar
In massive machine-type communication (mMTC) applications, a key challenge is joint device activity detection and channel estimation (JADCE) under grant-free random access, as a ma…
Greedy Capon Beamformer
Esa Ollila
We propose greedy Capon beamformer (GCB) for direction finding of narrow-band sources present in the array's viewing field. After defining the grid covering the location search spa…
Sparse signal recovery and source localization via covariance learning
Esa Ollila
In the Multiple Measurements Vector (MMV) model, measurement vectors are connected to unknown, jointly sparse signal vectors through a linear regression model employing a single kn…
Linear shrinkage of sample covariance matrix or matrices under elliptical distributions: a review
Esa Ollila
This chapter reviews methods for linear shrinkage of the sample covariance matrix (SCM) and matrices (SCM-s) under elliptical distributions in single and multiple populations setti…