3 citations · 7 across the 4 of their papers we have counts for
4 papers
Roy's largest root under rank-one alternatives:The complex valued case and applications
Prathapasinghe Dharmawansa, Boaz Nadler, Ofer Shwartz
The largest eigenvalue of a Wishart matrix, known as Roy's largest root (RLR), plays an important role in a variety of applications. Most works to date derived approximations to it…
Local Asymptotic Normality of the spectrum of high-dimensional spiked F-ratios
Prathapasinghe Dharmawansa, Iain M. Johnstone, Alexei Onatski
We consider two types of spiked multivariate F distributions: a scaled distribution with the scale matrix equal to a rank-one perturbation of the identity, and a distribution with…
Locally Best Invariant Test for Multiple Primary User Spectrum Sensing
Lu Wei, Prathapasinghe Dharmawansa, Olav Tirkkonen
We consider multi-antenna cooperative spectrum sensing in cognitive radio networks, when there may be multiple primary users. A noise-uncertainty-free detector that is optimal in t…
On the Exact Distribution of the Scaled Largest Eigenvalue
Lu Wei, Olav Tirkkonen, Prathapasinghe Dharmawansa +1
In this paper we study the distribution of the scaled largest eigenvalue of complexWishart matrices, which has diverse applications both in statistics and wireless communications.…