Adaptive filter

Abstract

The invention discloses an adaptive filter and method, and the filter comprises a data input module, a filtering module, a parameter updating module, and a control module. The data input module, the filtering module, the parameter updating module and the control module are respectively connected to a signal bus. The data input module is provided with a data interface for receiving the external data, and the data input module and the parameter updating module are respectively provided with a clock interface for connecting a clock signal. The data input module is used for collecting and storing the received data. The filtering module is used for convolution calculation of the stored data, and achieving the adaptive filtering. The parameter updating module is used for updating a filtering coefficient after each filtering. The control module is used for controlling the start / stop of an adaptive filtering process. The filter employs a digital circuit, and can solve problems that a method employing software is long in adaptive filtering period and is large in power consumption.

Description

technical field [0001] The invention belongs to the technical field of integrated circuits, and more specifically relates to an adaptive filter. Background technique [0002] The representation of the signal is often uncertain. In order to achieve a better filtering effect for all signals, people put forward the concept of adaptive filtering. In the 1960s, B. Windrow and Hoff in the United States first proposed an adaptive filter algorithm mainly used in random signal processing, thus laying the groundwork for the development of adaptive filters. The so-called adaptive filter is to use the results of the filter parameters obtained at the previous moment to automatically adjust the filter parameters at the current moment to adapt to the unknown or time-varying statistical characteristics of the signal and noise, so as to achieve optimal filtering. . [0003] Adaptive signal processing mainly studies systems with variable or adjustable structures, which can improve their sig...

AI Technical Summary

Problems solved by technology

[0004] In the process of implementing the existing adaptive filter, since a large number of loop iterations are involved, the time consumption and power consumption are relatively large

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