156 citations · 1.4k across the 61 of their papers we have counts for
61 papers
Extensions on `A Convex Scheme for the Secrecy Capacity of a MIMO Wiretap Channel with a Single Antenna Eavesdropper'
Jennifer Chakravarty, Oliver Johnson, Robert Piechocki
One key metric for physical layer security is the secrecy capacity. This is the maximum rate that a system can transmit with perfect secrecy. For a Multiple Input Multiple Output (…
A negative binomial approximation in group testing
Letian Yu, Fraser Daly, Oliver Johnson
We consider the problem of group testing (pooled testing), first introduced by Dorfman. For non-adaptive testing strategies, we refer to a non-defective item as `intruding' if it o…
Bounds on Eavesdropper Performance for a MIMO-NOMA Downlink Scheme
Jennifer Chakravarty, Oliver Johnson, Robert Piechocki
Non-Orthogonal Multiple Access (NOMA) is a multiplexing technique for future wireless, which when combined with Multiple-Input Multiple-Output (MIMO) unlocks higher capacities for…
Information-theoretic convergence of extreme values to the Gumbel distribution
Oliver Johnson
We show how convergence to the Gumbel distribution in an extreme value setting can be understood in an information-theoretic sense. We introduce a new type of score function which…
Improved bounds for noisy group testing with constant tests per item
Oliver Gebhard, Oliver Johnson, Philipp Loick +1
The group testing problem is concerned with identifying a small set of infected individuals in a large population. At our disposal is a testing procedure that allows us to test sev…
Maximal correlation and the rate of Fisher information convergence in the Central Limit Theorem
Oliver Johnson
We consider the behaviour of the Fisher information of scaled sums of independent and identically distributed random variables in the Central Limit Theorem regime. We show how this…