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A frequency offset estimation method and device for a burst signal

A frequency offset estimation and burst signal technology, applied in the field of digital communication, can solve the problems of large frequency offset estimation error, difficulty in accurately estimating the short burst frame frequency offset value, etc., so as to improve the frequency offset estimation accuracy and solve the critical phase angle problem. The effect of inverting, suppressing the influence

Active Publication Date: 2020-05-26
SPACE STAR TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Therefore, the object of the present invention is to provide a method and device for frequency offset estimation of burst signals to solve the problem in the prior art that the error of frequency offset estimation is large when the signal-to-noise ratio is low, and it is difficult to accurately estimate short burst signals. The defect of the frequency offset value of the sending frame

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  • A frequency offset estimation method and device for a burst signal
  • A frequency offset estimation method and device for a burst signal
  • A frequency offset estimation method and device for a burst signal

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Embodiment 1

[0050] Such as figure 1 As shown, it is a schematic flow chart of the frequency offset estimation method for burst signals provided in this embodiment, which specifically includes the following steps:

[0051] Step S101, extracting the pilot information of each segment in the received burst frame to obtain at least two initial pilot sequences;

[0052] This embodiment is applicable to frequency offset estimation of a burst frame containing two or more discontinuous pilot sequences. A burst frame usually includes a data segment and a pilot segment, because the data receiver knows the symbol information contained in the pilot segment. Using the received pilot information and the known standard pilot information, the frequency deviation of the received burst frame can be estimated.

[0053] The frequency offset estimation method of this solution makes full use of each segment of pilot information in the burst frame structure, and simultaneously utilizes sequences of multiple se...

Embodiment 2

[0077] This embodiment provides a specific frequency offset estimation method for a burst signal in combination with the structure of the burst frame, as follows:

[0078] The structure of the burst frame containing two pieces of pilot information is as follows figure 2 shown.

[0079] The pilot code of the pilot sequence is divided into two sections, one section is pilot1, and its length is L1; the other section is pilot2, and its length is L2. The data section is also divided into two sections, the first section is Data1, and its data length is D1; ​​the second section is Data2, and its length is D2. So the length of the pilot code in the burst frame structure is L=L1+L2; the data length in the burst frame structure is D=D1+D2; the burst frame length is N=L+D; wherein the pilot sequence pilot1 and The position coordinates of each data of the pilot sequence pilot2 are P1=[1,2,...,L1] and P2=[L1+D1+1,...,L1+D1+L2]; the position P of the pilot sequence=[P1 , P2].

[0080] ...

Embodiment 3

[0095] Corresponding to the above method, this implementation provides a frequency offset estimation device for burst signals, such as image 3 The schematic diagram of the device composition shown includes:

[0096] The initial pilot sequence extraction module 301 is used to extract the pilot information of each segment in the received burst frame to obtain at least two initial pilot sequences;

[0097] A target pilot sequence generation module 302, configured to generate a target pilot sequence according to the pilot information and standard pilot information of each initial pilot sequence;

[0098] A phase angle processing module 303, configured to perform phase angle processing on the target pilot sequence to obtain a phase angle sequence;

[0099] Segment setting module 304, configured to segment the phase angle sequence and set the distance between adjacent phase angle sequences;

[0100] The frequency offset estimation module 305 is configured to calculate a series of...

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Abstract

The invention relates to a frequency offset estimation method and system for a burst-mode signal. The method comprises the steps of extracting pilot frequency information of each segment in a received burst frame to obtain at least two segments of initial pilot frequency sequences; according to the pilot frequency information of each segment of initial pilot frequency sequence and standard pilot frequency information, generating target pilot frequency sequences; carrying out phase angle obtaining processing on the target pilot frequency sequences to obtain phase angle sequences; segmenting the phase angle sequences and setting a spacing between each two adjacent phase angle sequences; and according to a difference of two adjacent phase angle values in the phase angle sequences, calculating a series of frequency offset estimated values. According to the scheme of estimating the frequency offset of the burst-mode signal, which is provided by the invention, under the condition that each segment of pilot frequency sequence in a burst sequence in short burst communication is relatively short, by processing each segment of pilot frequency sequence, frequency offset estimation can be carried out through utilizing multiple segments of pilot frequency information, and each segment of pilot frequency sequence is not requested to have an equal length, and thus, a frequency offset value of the short burst frame can be accurately estimated, and frequency offset estimation accuracy under the condition of a low signal-to-noise ratio can be improved.

Description

technical field [0001] The invention belongs to the field of digital communication, and in particular relates to a frequency offset estimation method and device for burst signals with low signal-to-noise ratio. Background technique [0002] In digital communication systems, accurate carrier frequency estimation for received signals is a very classic subject in carrier synchronization technology. The existence of carrier frequency offset directly affects the performance of the receiving system. Accurate estimation of carrier frequency offset and further frequency offset compensation are critical to signal demodulation. Therefore, it is important to study the frequency offset estimation algorithm meticulously. [0003] Carrier synchronization technology can be divided into two categories: data aided (Data Aided, DA) and non-data aided (NoData Aided, NDA) according to the auxiliary means adopted. The data-aided scheme uses pilot frequency as an auxiliary means, and uses param...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26
CPCH04L27/266
Inventor 李康赵诚王育刚刘江春王冉
Owner SPACE STAR TECH CO LTD
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