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Gardner symbol timing recovery method and device for accelerating convergence

A symbol timing recovery and convergence acceleration technology, applied in the field of communication, can solve problems such as unsuitability for burst transmission, slow convergence speed of timing loop algorithm, etc., and achieve the effects of large timing error, fast convergence speed, and simple device structure

Active Publication Date: 2019-11-01
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the Gardner timing loop algorithm converges slowly and is not suitable for burst transmission

Method used

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  • Gardner symbol timing recovery method and device for accelerating convergence
  • Gardner symbol timing recovery method and device for accelerating convergence
  • Gardner symbol timing recovery method and device for accelerating convergence

Examples

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Embodiment 1

[0052] See figure 1 , figure 1 It is a flow chart of a method for rapidly converging Gardner symbol timing recovery provided by an embodiment of the present invention. The symbol timing recovery method includes:

[0053] S1: Estimate the squared timing loop error on the input symbol to obtain the squared timing loop error value;

[0054] S2: perform delay processing on the input symbol;

[0055] S3: Use the squared timing loop error value as an initial value of the timing error of the Gardner timing loop, and perform Gardner timing error estimation and recovery on the delayed input symbols to obtain optimal sampling data.

[0056] Further, after the S3, it also includes:

[0057] S4: Perform matched filtering on the optimal sampling data, and output the optimal sampling data after the matched filtering.

[0058] The S1 includes:

[0059] S11: determine whether the frame indicator of the input symbol is valid, if invalid, continue to receive the input symbol, if valid, exec...

Embodiment 2

[0102] On the basis of the above embodiments, the present embodiment discloses a Gardner symbol timing recovery device that accelerates convergence. See Figure 4 , Figure 4 It is a block diagram of a Gardner symbol timing recovery apparatus for accelerating convergence provided by an embodiment of the present invention. The symbol timing recovery device includes a square timing loop module 1, a random storage module 2 and a Gardner timing loop module 3, wherein the square timing loop module 1 and the random storage module 2 are respectively connected to the Gardner timing loop module 3; the square timing loop module 1 It is used to estimate the squared timing loop error according to the preset number of input symbols to obtain the squared timing loop error value; the random memory module 2 is used to delay and buffer the input symbols; the Gardner timing loop module 3 is used to utilize the squared timing The loop error value is used as the initial value of the timing erro...

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Abstract

The invention relates to a Gardner symbol timing recovery method and device for accelerating convergence, and the method comprises the steps: carrying out the square timing ring error estimation of aninput symbol, and obtaining a square timing ring error value; carrying out delay processing on the input symbol; and taking the square timing loop error value as a timing error initial value of a Gardner timing loop, and performing Gardner timing error estimation and recovery on the delayed input symbol to obtain optimal sampling data. The device comprises a square timing loop module, a random storage module and a Gardner timing loop module. According to the method and the device provided by the invention, the square timing loop and the Gardner timing loop are combined, the estimation resultof the square timing loop is used as the timing error initial value of the Gardner timing loop, so that a faster convergence rate can be realized, a larger timing error can be resisted, and the methodis suitable for symbol timing recovery of a burst transmission system.

Description

technical field [0001] The invention belongs to the technical field of communications, and in particular relates to a method and device for accelerating the convergence of Gardner symbol timing recovery. Background technique [0002] During actual transmission, due to the influence of system clock drift and transmission delay, it is difficult to maintain clock synchronization at the receiving and transmitting ends. The main function of symbol timing recovery is to synchronize the receiving and sending signal clocks and find the best sampling time. It specifically includes two functional parts: timing error detection and timing error correction. There are many methods for extracting timing errors, which can be roughly divided into two types: data-aided methods and non-data-aided methods. Among them, the non-data-aided methods do not require training sequences and lack the feedback link of signals. If the algorithm is not complex, non-data-assisted methods can capture timing ...

Claims

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Application Information

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IPC IPC(8): H04L27/26H04L27/20H04L7/00
CPCH04L7/00H04L27/20H04L27/2657
Inventor 张南李强高洋宫丰奎
Owner XIDIAN UNIV
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