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Decision Feedback Equalization Processing Method and Equalizer

A technology of judgment feedback equalization and processing method, which is applied in the field of digital communication to achieve the effect of improving system performance

Active Publication Date: 2019-09-13
ALTO BEAM (CHINA) INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide a decision feedback equalization processing method and an equalizer to solve the problem that the equalizer can cope with various special situations in a complex environment

Method used

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  • Decision Feedback Equalization Processing Method and Equalizer
  • Decision Feedback Equalization Processing Method and Equalizer
  • Decision Feedback Equalization Processing Method and Equalizer

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0038] An embodiment of the present invention provides a decision feedback equalization processing method. figure 1 It is a flowchart of a decision feedback equalization processing method according to an embodiment of the present invention. Such as figure 1 As shown, the decision feedback equalization processing method includes the following steps:

[0039] S102, performing interference elimination on the received information;

[0040] S104, forming a cyclic sequence with the information after the interference is eliminated;

[0041] S106, performing minimum mean square error equalization on the cyclic sequence and the estimated channel in the frequency domain;

[0042] S108, estimating the effective signal-to-noise ratio according to the result of minimum mean square error equalization;

[0043]S110. Perform decision feedback equalization processing according to the effective signal-to-noise ratio.

[0044] In this embodiment, the technical features can also be:

[0045...

Embodiment 2

[0070] The embodiment of the invention also provides an equalizer. It should be noted that the equalizer in the embodiment of the present invention can be used to implement a decision feedback equalization processing method provided in the embodiment of the present invention, and a decision feedback equalization processing method in the embodiment of the present invention can also be implemented by the embodiment of the present invention provided by an equalizer to perform.

[0071] figure 2 is a schematic diagram of an equalizer according to an embodiment of the present invention. Such as figure 2 As shown, the equalizer includes:

[0072] An interference elimination module 22, configured to perform interference elimination on the received information;

[0073] A cyclic sequence construction module 24, configured to form a cyclic sequence with information after interference cancellation;

[0074] The minimum mean square error equalization module 26 is used to perform m...

Embodiment 3

[0078] In this embodiment, the technical features include: national standard single-carrier modulation channel equalization method at the receiving end, minimum mean square error (MMSE) equalization in frequency domain, calculation of feedback filter coefficients, noise prediction DFE structure, and bidirectional (BI) DFE structure , soft decision for feedback, merging of bidirectional DFE results, and overall structure, etc.

[0079] The equalization method also includes a method of intercepting a segment of received data containing a frame symbol to be equalized, using the data of the previous frame or PN sequence and channel state information to remove inter-frame interference, or using PN and channel state information to reconstruct the received signal, that is Elimination method and compensation method.

[0080] Sum the head and tail of the received signal to form a new head, and remove the tail, or sum the head and tail to form a new tail, and remove the head to form a c...

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Abstract

The invention discloses a decision feedback equalization processing method and an equalizer. The method comprises the following steps: performing interference elimination on received information; forming a cyclic sequence out of the information after the interference elimination; performing minimum mean square deviation equalization on the cyclic sequence with an estimated channel in a frequency domain; according to a result of the minimum mean square deviation equalization, estimating an effective signal-to-noise ratio; and according to the effective signal-to-noise ratio, performing decision feedback equalization processing. The technical problem of enabling an equalizer to handle various special conditions in a complex environment is solved.

Description

technical field [0001] The invention relates to the technical field of digital communication, in particular to a decision feedback equalization processing method and an equalizer. Background technique [0002] In 2006, the international GB20600-2006 formulated "Frame Structure, Channel Coding and Modulation of Digital TV Terrestrial Broadcasting Transmission System". [0003] It is stipulated in the standard that basic data blocks and system information are combined to form a frame body. Data processing forms a frame body, and the frame body and PN sequence (pseudo-noise sequence) are multiplexed to form a signal frame. In single-carrier (C=1) mode, the generated The time-domain signal is the symbol of the frame body information, and the PN sequence has three modes: PN420, PN595, and PN945. Due to the influence of the multipath channel, inter-symbol interference (ISI) will appear in the received signal, and the function of the equalizer is to reduce the impact of symbol int...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/03
Inventor 傅天煌王晓晖
Owner ALTO BEAM (CHINA) INC
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