1. Adaptive filtering with bandwidth constraints in the feedback path
- Author
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Gábor Péceli, László Sujbert, and György Orosz
- Subjects
Computer science ,Bandwidth (signal processing) ,Real-time computing ,Networked control system ,Adaptive filter ,Control and Systems Engineering ,Control theory ,Control system ,Signal Processing ,Computer Vision and Pattern Recognition ,Electrical and Electronic Engineering ,Wireless sensor network ,Software ,Data compression - Abstract
This paper introduces a new, adaptive-filter-based controller that shows advantageous properties from the viewpoint of its communication requirement. The algorithm is called signed-error filtered-x LMS (SE-FxLMS). Its novelty is characterized by the fact that it makes possible data compression in the feedback path of adaptive-filter-based control loops in a very simple way. This feature is especially useful in such closed-loop systems where the feedback signals are transmitted over a low-bandwidth communication channel. This is a typical case in so-called networked control systems (NCS), where the communication is carried out over a shared communication channel, e.g., using a wireless sensor network. The paper introduces an analysis of the algorithm as well.
- Published
- 2012