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Time-domain adaptive aqualizer combined with NR code

An adaptive equalization, time-domain technology, applied in the transmitter/receiver shaping network, digital transmission system, electrical components, etc., can solve the problem of large decoding delay, easy error spread, etc., to improve efficiency , improve dynamic performance, improve the effect of correctness

Inactive Publication Date: 2008-01-23
上海奇普科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of Viterbi (viterbi) decoding has problems such as large decoding delay and easy error diffusion.

Method used

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  • Time-domain adaptive aqualizer combined with NR code
  • Time-domain adaptive aqualizer combined with NR code
  • Time-domain adaptive aqualizer combined with NR code

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Embodiment Construction

[0031] As shown in Figure 1, according to the present invention, it includes: a feedforward filter 1, a signal superimposer 2, a delay unit 3, a level decision device 4 based on NR decoding, a feedback filter 5, a coefficient update controller 6, an error Builder7. The interconnection relationship between its various components is: the output of the feedforward filter 1 is connected to the input of the signal adder 2, the output of the feedback filter 5 is connected to the other input of the signal adder 2, and the output of the signal adder 2 is connected to the input of the signal adder 2 respectively. The level decision device 4 based on NR decoding is connected with the input of the delay unit 3, and the output of the level decision device 4 based on NR decoding is connected with the input of the feedback filter 5 and the input of the error generator 7 respectively, The output of the delay unit 3 is connected with the input of the error generator 7, the output of the error...

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Abstract

A time domain adaptive equalizer combined with NR code includes a feed-forward filter, a signal laminator, a delay unit, a level decider, a feedback filter, a coefficient refresh controller and an error generator, among which, the feed-forward filter output is connected with the input of the signal laminator, the output of the feedback filter is connected with the input of the signal laminator, the output of which is connected with the inputs of the decider and the delay unit separately, output of the decider is connected with the inputs of the feedback filter and the error generator, output of the delay unit is connected with the input of the generator, output of which is connected with the input of coefficient refresh controller and its output is connected with the input of the two filters.

Description

technical field [0001] The invention relates to a time-domain adaptive equalizer, in particular to a time-domain adaptive equalizer combined with a Nordstrom-Robinson (abbreviated as NR code) code. It belongs to the field of electronic communication. Background technique [0002] The equalizer is a very important component in the practical application of many different digital information such as voice, data and video communication. Equalizers are used as echo cancellers (compensators) for loudspeakers in full-duplex communications, video deghosting in digital television or digital cable transmission, signal conditioners for wireless modems and wireless phones, etc. In the process of signal transmission, due to the existence of multipath signals in the channel, it will bring inter-symbol interference (ISI), and inter-symbol interference is an important cause of errors. In most single-carrier digital applications, the time Domain Adaptive Equalizer to correct ISI errors. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H04L25/03
Inventor 何大治归琳管云峰
Owner 上海奇普科技有限公司
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