Depth spread spectrum capture and interference suppression method based on sparse Fourier transform

A sparse Fourier transform and interference suppression technology, applied to electrical components, transmission systems, etc., can solve problems such as large amount of calculation, waste of resources, and unsatisfactory performance, so as to reduce complexity, improve concealment, and improve anti-interception performance Effect

Inactive Publication Date: 2013-12-04
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0003] The deep spread spectrum technology and interference suppression technology in the prior art have a huge amount of calculation, waste of resources, and unsatisfactory performance in terms of calculation processing.

Method used

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  • Depth spread spectrum capture and interference suppression method based on sparse Fourier transform
  • Depth spread spectrum capture and interference suppression method based on sparse Fourier transform
  • Depth spread spectrum capture and interference suppression method based on sparse Fourier transform

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Experimental program
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Embodiment

[0026] Such as figure 1 , figure 2 , image 3 and Figure 4 Shown:

[0027] 1) Perform windowing processing on the received spread spectrum signal, and then preprocess the time domain of the spread spectrum signal;

[0028] Described windowing process refers to multiplying the spread spectrum signal with the window function to obtain a finite length sequence, and its length is N; N is a natural number; the length of N is related to the precision and sampling clock of the spread spectrum signal captured, so In the actual situation, the value is selected according to the effect to be achieved. Here, the N value is set to 1024, and the rectangular window is used as the window function.

[0029] The preprocessing refers to dividing the obtained finite length sequence into N / P rows and P columns at equal intervals, and superimposing each row of data to obtain an N / P point sequence; here, the value of P is 8, and each row is Sequences are superimposed to obtain 128-point seque...

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Abstract

The invention relates to a depth spread spectrum capture and interference suppression method based on sparse Fourier transform and belongs to the technical field of spread spectrum communication signal processing. The method includes: adopting the depth spread spectrum technology to improve concealment and intercept resistance of a user side; adopting the interference suppression algorithm to further improve interference margin of a system and guarantee communication reliability; jointly processing the capture technology and the interference suppression algorithm and reducing complexity of spaceborne signal processing; adopting the sparse Fourier transform to reduce algorithm complexity, wherein in-band interference of a spread spectrum receiver is sparse in a frequency domain.

Description

technical field [0001] The invention relates to a deep spread spectrum acquisition and interference suppression method based on sparse Fourier transform, and belongs to the technical field of spread spectrum communication signal processing. Background technique [0002] In the case of limited transmission power of special communication terminals, it is necessary to reduce the symbol rate to ensure the reliability of communication. At the same time, in order to improve the concealment and anti-interception performance of the user end, the uplink will adopt deep spread spectrum technology. However, the Doppler frequency offset caused by the radial velocity between the satellite and the ground will bring great difficulties to the rapid acquisition of deep spread spectrum, and seriously consume precious on-board signal processing resources. On the other hand, in the case of a relatively harsh channel environment, in order to ensure reliable communication, the satellite payload ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/7075H04B1/7097
Inventor 杜昌澔韩航程马瑛宋左乔
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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