## Which of the following is application of adaptive filter?

One common adaptive filter application is to use adaptive filters to identify an unknown system, such as the response of an unknown communications channel or the frequency response of an auditorium, to pick fairly divergent applications. Other applications include echo cancellation and channel identification.

## Where adaptive filters are used?

As the power of digital signal processors has increased, adaptive filters have become much more common and are now routinely used in devices such as mobile phones and other communication devices, camcorders and digital cameras, and medical monitoring equipment.

1 Introduction. Adaptive filters are commonly used in image processing to enhance or restore data by removing noise without significantly blurring the structures in the image.

## What is principle of adaptive filter?

Adaptive filters are self- designing filters based on an algorithm which allows the filter to “learn” the initial input statistics and to track them if they are time varying. These filters estimate the deterministic signal and remove the noise un- correlated with the deterministic signal.

In short, the main function of the adaptive filter is to minimize the power of the error signal Eestimate(n) by adjusting the coefficients of the FIR filter via the LMS algorithm.

## What are the types of adaptive filters?

The classical configurations of adaptive filtering are system identification, prediction, noise cancellation, and inverse modeling.

## What is LMS algorithm?

The least mean square (LMS) algorithm is a type of filter used in machine learning that uses stochastic gradient descent in sophisticated ways – professionals describe it as an adaptive filter that helps to deal with signal processing in various ways.

## Is LMS filter linear?

e(n) is the error signal that denotes the difference between d(n) and y(n). The linear filter can be different filter types such as finite impulse response (FIR) or infinite impulse response (IIR). The LMS algorithm is an adaptive algorithm among others which adjusts the coefficients of FIR filters iteratively.

## How adaptive filter is different from digital filter?

A traditional digital filter has only one input signal x(n) and one output signal y(n). An adaptive filter requires an additional input signal d(n) and returns an additional output signal e(n). The filter coefficients of a traditional digital filter do not change over time.

## How can you choose adaptive filter algorithms?

You must consider both convergence speed and computational resource requirements when choosing an adaptive filter algorithm. For example, the sign least mean squares (LMS) algorithms require the fewest computational resources. However, the corresponding convergence speed is slow.