4 papers
Multi-Channel Factor Analysis: Identifiability and Asymptotics
Gray Stanton, David Ramírez, Ignacio Santamaria +2
Recent work by Ramírez et al. [2] has introduced Multi-Channel Factor Analysis (MFA) as an extension of factor analysis to multi-channel data that allows for latent factors common…
Passive detection of a random signal common to multi-sensor reference and surveillance arrays
David Ramírez, Ignacio Santamaria, Louis L. Scharf
This paper addresses the passive detection of a common rank-one subspace signal received in two multi-sensor arrays. We consider the case of a one-antenna transmitter sending a com…
First-Order Statistical Framework for Multi-Channel Passive Detection
Todd McWhorter, Louis Scharf, Margaret Cheney
In this paper we establish a general first-order statistical framework for the detection of a common signal impinging on spatially distributed receivers. We consider three types of…
Testing for Causal Influence using a Partial Coherence Statistic
Louis L. Scharf, Yuan Wang
In this paper we explore partial coherence as a tool for evaluating causal influence of one signal sequence on another. In some cases the signal sequence is sampled from a time- or…