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Frequency offset correction method and device for satellite communication

A satellite communication and frequency offset technology, which is applied in the field of satellite communication, can solve problems such as unproposed solutions and high frequency band resources, and achieve large-scale high-precision frequency offset estimation, ensure accuracy, and solve the effects of high frequency band resources

Active Publication Date: 2020-06-12
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the excellent characteristics of Turbo codes can only be reflected when the carrier can be perfectly synchronized, that is, even a small frequency shift will cause a sharp decline in the performance of the code word, so frequency offset estimation is an important issue in satellite communications, but the existing There is a technical problem in the technology that the frequency band resources occupied by estimating the frequency offset are relatively high
[0004] Aiming at the above problems, no effective solution has been proposed

Method used

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  • Frequency offset correction method and device for satellite communication
  • Frequency offset correction method and device for satellite communication
  • Frequency offset correction method and device for satellite communication

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Embodiment 1

[0030] According to an embodiment of the present invention, an embodiment of a frequency offset correction method for satellite communication is provided. It should be noted that the steps shown in the flow chart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, Also, although a logical order is shown in the flowcharts, in some cases the steps shown or described may be performed in an order different from that shown or described herein.

[0031] figure 1 is a schematic diagram of a satellite communication frequency offset correction method according to an embodiment of the present invention, as shown in figure 1 As shown, the method includes the following steps:

[0032] Step S102, obtain the target data packet, wherein, the target data packet is the data packet to be processed sent by the sending end of the satellite communication, which contains Gaussian white noise and carrier frequency shift obtained by se...

Embodiment 2

[0084] The present invention also provides a satellite communication frequency offset correction device, which is used to implement the satellite communication frequency offset correction method provided by the above-mentioned content of the embodiment of the present invention. The following is the satellite communication frequency offset provided by the embodiment of the present invention A detailed description of the correction device.

[0085] Such as Figure 6 As shown, the device includes: an acquisition unit 10 , a calculation unit 20 , an iteration unit 30 and a determination unit 40 .

[0086] The acquisition unit 10 acquires the target data packet, wherein the target data packet is the data packet to be processed sent by the transmitting end of the satellite communication, which contains Gaussian white noise and carrier wave obtained by sequentially performing the first Turbo encoding process and the first modulation process. frequency-shifted packets;

[0087] The ...

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Abstract

The invention provides a frequency offset correction method and device for satellite communication, and relates to the technical field of satellite communication, and the method comprises the steps: obtaining a target data packet; calculating a normalized frequency offset value of the target data packet based on the maximum absolute value soft output value function; carrying out repeated iterativeoptimization on the target data packet, and obtaining a corrected data packet and an iterative frequency offset value after each optimization until the optimization frequency of carrying out iterative optimization on the target data packet reaches a preset iteration frequency or the iterative frequency offset value is 0; and determining the correction data packet obtained by performing iterativeoptimization on the target data packet when the optimization frequency reaches the preset iteration frequency, or determining the correction data packet when the iterative frequency offset value is 0as the optimal data packet, thereby solving the technical problem of relatively high frequency band resources occupied by satellite communication for estimating the frequency offset in the prior art.

Description

technical field [0001] The invention relates to the technical field of satellite communication, in particular to a frequency offset correction method and device for satellite communication. Background technique [0002] With the rapid development of aerospace technology, satellite communication has become one of the mainstream communication methods. Satellite communication has the characteristics of wide communication range, strong disaster resistance, and support for multiple services, and has become one of the indispensable means of communication in the contemporary era. [0003] In recent years, Shannon limit Turbo codes (such as Turbo, LDPC, etc.) have attracted widespread attention due to their low SNR threshold and high gain. By comparing the performance of Turbo, LDPC, and Polar codes, it can be known that the theoretical performance of Turbo codes is better than the other two in the case of short frame length and low noise ratio. However, the excellent characterist...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/00H04L27/26
CPCH04L27/0014H04L27/266H04L2027/0026
Inventor 匡麟玲姜春晓王佳蔚
Owner TSINGHUA UNIV
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