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A Gardner Symbol Timing Recovery Method and Device for Accelerated Convergence

A symbol timing recovery and accelerated convergence technology, applied in the field of communications, can solve the problems of unsuitable burst transmission, slow convergence of timing loop algorithms, etc., and achieve the effects of large timing error, fast convergence speed, and low algorithm complexity

Active Publication Date: 2020-06-09
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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  • A Gardner Symbol Timing Recovery Method and Device for Accelerated Convergence
  • A Gardner Symbol Timing Recovery Method and Device for Accelerated Convergence
  • A Gardner Symbol Timing Recovery Method and Device for Accelerated Convergence

Examples

Experimental program
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Effect test

Embodiment 1

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

[0053] S1: Estimate the error of the square timing loop on the input symbol, and obtain the error value of the square timing loop;

[0054] S2: Perform delay processing on the input symbols;

[0055] S3: Using the squared timing loop error value as an initial value of the timing error of the Gardner timing loop, 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 best sampled data, and output the matched filtered best sampled data.

[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, and if valid, execute S12; ...

Embodiment 2

[0102] On the basis of the foregoing embodiments, this embodiment discloses a device for recovering Gardner symbol timing that accelerates convergence. See Figure 4 , Figure 4 It is a block diagram of an accelerated convergence Gardner symbol timing recovery device provided by an embodiment of the present invention. The symbol timing recovery device comprises 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 error of the square timing loop according to the preset number of input symbols, and obtain the error value of the square timing loop; the random storage module 2 is used to delay and buffer the input symbols; the Gardner timing loop module 3 is used to use the square timing The loop error value is used as the initial value of the timi...

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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 communication, and in particular relates to a Gardner symbol timing recovery method and device for accelerating convergence. Background technique [0002] Due to the influence of system clock drift and transmission delay during signal transmission, 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, which 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-assisted methods and non-data-assisted methods. Among them, the non-data-assisted methods do not require training sequences and lack signal feedback links. If the algorithm is not complex, non-data-assisted methods can catch timing errors...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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