dorsal/arxiv
View SchemaA generalized spatiotemporal covariance model for stationary background in analysis of MEG data
| Authors | S. M. Plis, D. M. Schmidt, S. C. Jun, D. M. Ranken |
|---|---|
| Categories | |
| ArXiv ID | physics/0605142 |
| URL | https://arxiv.org/abs/physics/0605142 |
Abstract
Using a noise covariance model based on a single Kronecker product of spatial and temporal covariance in the spatiotemporal analysis of MEG data was demonstrated to provide improvement in the results over that of the commonly used diagonal noise covariance model. In this paper we present a model that is a generalization of all of the above models. It describes models based on a single Kronecker product of spatial and temporal covariance as well as more complicated multi-pair models together with any intermediate form expressed as a sum of Kronecker products of spatial component matrices of reduced rank and their corresponding temporal covariance matrices. The model provides a framework for controlling the tradeoff between the described complexity of the background and computational demand for the analysis using this model. Ways to estimate the value of the parameter controlling this tradeoff are also discussed
{
"annotation_id": "3218f00f-3d04-43fe-ae6f-7df43fe27b65",
"date_created": "2026-03-02T18:01:07.421000Z",
"date_modified": "2026-03-02T18:01:07.421000Z",
"file_hash": "e4a96e151101907894dea123c8379453d3ff32b4f537a83f6f83d45928f683fc",
"private": false,
"record": {
"abstract": "Using a noise covariance model based on a single Kronecker product of spatial\nand temporal covariance in the spatiotemporal analysis of MEG data was\ndemonstrated to provide improvement in the results over that of the commonly\nused diagonal noise covariance model. In this paper we present a model that is\na generalization of all of the above models. It describes models based on a\nsingle Kronecker product of spatial and temporal covariance as well as more\ncomplicated multi-pair models together with any intermediate form expressed as\na sum of Kronecker products of spatial component matrices of reduced rank and\ntheir corresponding temporal covariance matrices. The model provides a\nframework for controlling the tradeoff between the described complexity of the\nbackground and computational demand for the analysis using this model. Ways to\nestimate the value of the parameter controlling this tradeoff are also\ndiscussed",
"arxiv_id": "physics/0605142",
"authors": [
"S. M. Plis",
"D. M. Schmidt",
"S. C. Jun",
"D. M. Ranken"
],
"categories": [
"physics.med-ph",
"physics.data-an"
],
"title": "A generalized spatiotemporal covariance model for stationary background in analysis of MEG data",
"url": "https://arxiv.org/abs/physics/0605142"
},
"schema_id": "dorsal/arxiv",
"source": {
"execution_id": "b0170148-5573-44c7-928f-df859951e822",
"id": "arXiv Dataset IDs",
"type": "Model",
"variant": "snapshot-2026-03-01",
"version": "0.1.0"
},
"user_id": 1000002
}