# Distributed Blind Source Separation based on FastICA

arXiv: https://arxiv.org/abs/2410.19112 · HTML: https://mlsanity.com/paper/2410.19112/

## Key facts

- Cited by 1 papers in the map (data through 14 Oct 2026).
- Builds on 5 of its 31 references that are in the map.
- First posted on arXiv 24 Oct 2024.

## Builds on (most cited first, 5 of 5)

- [A Unified Algorithmic Framework for Distributed Adaptive Signal and Feature Fusion Problems -- Part I: Algorithm Derivation](https://mlsanity.com/paper/2208.08867/) (2022)
- [A Unified Algorithmic Framework for Distributed Adaptive Signal and Feature Fusion Problems -- Part II: Convergence Properties](https://mlsanity.com/paper/2208.09088/) (2022)
- [A Distributed Adaptive Algorithm for Non-Smooth Spatial Filtering Problems](https://mlsanity.com/paper/2210.15243/) (2022)
- [A Distributed Adaptive Algorithm for Node-Specific Signal Fusion Problems in Wireless Sensor Networks](https://mlsanity.com/paper/2211.01411/) (2022)
- [Distributed Adaptive Spatial Filtering with Inexact Local Solvers](https://mlsanity.com/paper/2405.03277/) (2024)

## Built on by (most cited first, 1 of 1)

- [Joint Extremum Compression and Detection of a Time-Delayed Signal for Distributed Sensing](https://mlsanity.com/paper/2607.10874/) (2026)

## Abstract (arXiv)

With the emergence of wireless sensor networks (WSNs), many traditional signal processing tasks are required to be computed in a distributed fashion, without transmissions of the raw data to a centralized processing unit, due to the limited energy and bandwidth resources available to the sensors. In this paper, we propose a distributed independent component analysis (ICA) algorithm, which aims at identifying the original signal sources based on observations of their mixtures measured at various sensor nodes. One of the most commonly used ICA algorithms is known as FastICA, which requires a spatial pre-whitening operation in the first step of the algorithm. Such a pre-whitening across all nodes of a WSN is impossible in a bandwidth-constrained distributed setting as it requires to correlate each channel with each other channel in the WSN. We show that an explicit network-wide pre-whitening step can be circumvented by leveraging the properties of the so-called Distributed Adaptive Signal Fusion (DASF) framework. Despite the lack of such a network-wide pre-whitening, we can still obtain the Q least Gaussian independent components of the centralized ICA solution, where Q scales linearly with the required communication load.