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Method for changing the step size of an adaptive filter tracing error

IP.com Disclosure Number: IPCOM000125740D
Publication Date: 2005-Jun-15
Document File: 2 page(s) / 51K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a method for changing the step size of an adaptive filter tracing error. Benefits include improved functionality, improved performance, and improved reliability

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Method for changing the step size of an adaptive filter tracing error

Disclosed is a method for changing the step size of an adaptive filter tracing error. Benefits include improved functionality, improved performance, and improved reliability.

Background

              Conventionally, the least mean square (LMS) adaptive filter algorithm is used in channel equalization, echo cancellation in wires, and wireless and acoustic technologies. This algorithm defines the program step size. It can be a constant size, time variant, or a power-based step size. However, the convergence may be too slow with a variable step size.

General description

              The disclosed method is a method for changing the step size of an adaptive filter tracing error in an LMS adaptive filter algorithm. The method can be applied to an equalizer in a dial-up Internet modem.

Advantages

              The disclosed method provides advantages, including:

•             Improved functionality due to enabling an adaptive step size

•             Improved performance due to providing faster connection speeds with different types of telephone lines

•             Improved performance due to providing faster convergence of the adaptive filter

•             Improved reliability due to providing fewer errors value

Detailed description

              The disclosed method includes a changeable step size that adapts with changes in the error value. As it decreases, the step size decreases. The method improves convergence and provide...