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Bit synchronization method and device

A technology of bit synchronization and symbols, applied in the field of communication, can solve problems such as complexity and increased bit error rate, and achieve the effect of fine positioning and high anti-noise ability

Active Publication Date: 2018-08-07
ACAD OF BROADCASTING SCI SARFT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Closed-loop method is more accurate, but also more complex
Inaccurate bit synchronization will increase the bit error rate

Method used

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Embodiment Construction

[0027] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0028] The present invention provides a relatively simple and practical open-loop self-synchronization method that utilizes the autocorrelation characteristics of a pseudo-random (Pseudo-noise, PN) sequence for fine correction, strong anti-noise capability, and is suitable for digital signal processing. , the present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. I...

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Abstract

The invention discloses a bit synchronization method and device. The method comprises the following steps: obtaining original data a (n) through AD sampling, and processing the original data to obtain a sign data stream x(n), wherein the x(n) is a real number and n is a natural number; carrying out binary decision on the x(n), constructing a data stream xd (n), carrying out matched filtering with the data stream xd (n) being served as an input signal of a filter H(n) constructed in advance, and obtaining an output signal y(n); setting a threshold value, when the y(n) is smaller than or equal to the threshold value, not carrying out processing, and when the y(n) is larger than the threshold value, calculating the peak value of the y(n), and determining jump edge of the sign information based on the time corresponding to the peak value; and determining the optimum sampling time of follow-up sign bits according to the jump edge, and carrying out data sampling and processing on the follow-up data in the same data frame at the optimum sampling time.

Description

technical field [0001] The invention relates to the communication field, in particular to a bit synchronization method and device. Background technique [0002] The purpose of bit synchronization is to make each symbol get the best demodulation and decision. Bit synchronization can be divided into two categories: external synchronization method and self-synchronization method: the external synchronization method needs to transmit bit synchronization information specially; the self-synchronization method extracts the bit synchronization information contained in the signal symbol. Generally speaking, the self-synchronization method is more widely used. [0003] In the prior art, the self-synchronization method can be further divided into two types, that is, an open-loop synchronization method and a closed-loop synchronization method. The open-loop method extracts bit synchronization information by doing some transformation on the input symbols. The closed-loop method locks ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L7/00
Inventor 周德斌郭沛宇许帮保刘春江
Owner ACAD OF BROADCASTING SCI SARFT