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Transposed structure for a decision feedback equalizer combined with a trellis decoder

A feedback equalizer and decision-making technology, which is applied to the shaping network, baseband system components, digital transmission system, etc. in the transmitter/receiver, and can solve problems such as channel distortion and damage.

Inactive Publication Date: 2005-07-27
MICRONAS SEMICON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this pulse shaping will be corrupted by channel distortion which will smear or extend the pulse during transmission

Method used

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  • Transposed structure for a decision feedback equalizer combined with a trellis decoder
  • Transposed structure for a decision feedback equalizer combined with a trellis decoder
  • Transposed structure for a decision feedback equalizer combined with a trellis decoder

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Embodiment Construction

[0027] To facilitate an understanding of the principles of the invention, reference will now be made to the embodiments illustrated in the drawings and specific language will be used to describe them. It should be understood, however, that no limitation of the scope of the invention is thereby intended. Such alterations and further modifications of the invention and further applications of the principles of the invention as described herein are contemplated and required to be protected as will be apparent to those skilled in the art to which this invention pertains.

[0028]The present invention provides a transpose structure for a decision feedback equalizer ("DFE") that can be used with, for example, a combined DFE and lattice decoder, as described in U.S. Patent Application No. 09 / 884,256 (herein All are incorporated by reference). The transpose structure allows for extremely fast and efficient phantom cancellation, enabling the equalizer to provide high quality signal res...

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Abstract

A DFE comprises a trellis decoder and a plurality of sub-filter pipelines. Each of the plurality of sub-filter pipelines is fed intermediate decoded symbols of one of the stages in a trace-back chain of a current decoding bank. The DFE output is formed by summing the plurality of sub-filter pipelines.

Description

[0001] priority claim [0002] This application claims priority to U.S. Provisional Patent Application Nos. 60 / 370,380 and 60 / 370,413. Background technique [0003] Equalizers are important components in many different digital information applications, such as voice, data and video communications. These applications employ a variety of transmission media. Although the various media have different transmission characteristics, none of them are perfect. That is, each medium introduces variations into the transmitted signal, such as frequency-dependent phase and amplitude distortion, multipath reception, other kinds of phantoms such as voice echoes, and Rayleigh attenuation. In addition to channel distortion, virtually every transmission suffers from noise, such as additive white Gaussian noise ("AWGN"). Equalizers are thus used as acoustic echo cancellers (such as in full-duplex speakerphones), video deghosting (such as in digital television or digital cable transmission), si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L25/03
CPCH04L1/006H04L1/0054H04L25/03203H04L25/03267H04L25/03057H03H21/00H03H7/30
Inventor S·陈J·朱X·杨
Owner MICRONAS SEMICON