@conference {605,
	title = {Sparse subspace averaging for order estimation},
	booktitle = {IEEE Statistical Signal Processing Workshop},
	year = {2021},
	month = {July},
	abstract = {This paper addresses the problem of source enumeration for arbitrary geometry arrays in the presence of spatially correlated noise. The method combines a sparse reconstruction (SR) step with a subspace averaging (SA) approach, and hence it is named sparse subspace averaging (SSA). In the first step, each received snapshot is
approximated by a sparse linear combination of the rest of snapshots. The SR problem is regularized by the logarithm-based surrogate of the l0-norm and solved using a majorization-minimization approach. Based on the SR solution, a sampling mechanism is proposed in the second step to generate a collection of subspaces, all of which approximately span the same signal subspace. Finally, the dimension of the average of this collection of subspaces provides a robust estimate for the number of sources. Our simulation results show that SSA provides robust order estimates under a variety of noise models.},
	author = {Garg, Vaibhav and Ram{\'\i}rez, David and Santamar{\'\i}a, Ignacio}
}
