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Self-adaptive transmission link intelligent joint equalization device

A technology of adaptive transmission and joint equalization, applied in transmission systems, digital transmission systems, baseband systems, etc., can solve the problems of blind equalizer error calculation errors, inability to converge, serious system bit errors, etc.

Active Publication Date: 2020-02-11
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this way, when the modulation method changes, the error calculation of the blind equalizer will be wrong, and it will not be able to converge, resulting in more serious system errors and even affecting the normal operation of the system.

Method used

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  • Self-adaptive transmission link intelligent joint equalization device

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Embodiment Construction

[0033] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0034] An intelligent joint equalization device for a transmission link, which includes a demodulation module, a first-level intelligent equalization module, and a second-level intelligent equalization module, and both the first-level intelligent equalization module and the second-level intelligent equalization module include a feedforward filter and Feedback filter; where,

[0035] The demodulation module is used to perform clock and carrier recovery on the high-order modulated signal inserted with a priori pilot, demodulate the data frame X(n) and obtain the modulation mode information of the data frame X(n); the data frame X(n) ) frame structure such as figure 1 shown, including the interleaved pilot portion X 1 (n) and the payload part X 2 (n), pilot part X 1(n) has length N;

[0036] Such as figure 2 As shown, the first-level intell...

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Abstract

The invention discloses a self-adaptive transmission link intelligent joint equalization device, and belongs to the technical field of self-adaptive code modulation, transmission link equalization andthe like. The system comprises a demodulation module, a first-stage intelligent equalization module and a second-stage intelligent equalization module, each of the first-stage intelligent equalization module and the second-stage intelligent equalization module comprises a feedforward filter and a feedback filter, wherein the demodulation module is used for carrying out clock and carrier recoveryon a high-order modulation signal inserted with a prior pilot frequency; the first-stage intelligent equalization module and the second-stage intelligent equalization module adaptively update tap coefficients of the feed-forward filter and the feedback filter in the modules respectively; and finally, the second-stage intelligent equalization module filters the demodulated data frame output by thedemodulation module according to the equalized tap coefficient to obtain filtered payload part data. According to the invention, the tap coefficient of the filter can be adaptively adjusted, and rapidand effective equalization of data is realized.

Description

technical field [0001] The present invention relates to the technical fields of adaptive coding and modulation, transmission link equalization, etc., and particularly refers to an adaptive transmission link intelligent joint equalization device, which is suitable for high-order modulation, frame-by-frame modulation and adaptive coding and modulation technology transmission link. Background technique [0002] When the adaptive coding and modulation technology is used in the communication link, the transmission rate of the link and the modulation method adopted change at any time according to the link requirements. At present, the equalizer does not support the change of the transmission rate. Specifically, the input clock of the existing equalizer remains unchanged. Once the input signal rate changes, the input signal collected by the fixed clock of the equalizer is different from the actual transmitted signal. Different, the existence of the equalizer will lose its meaning,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/03
CPCH04L25/03019
Inventor 崔霞霞李新玲王少飞刘一龙张丽娜韩忠良
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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