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Satellite communication non-malicious interference suppression method based on decision feedback adaptive cancellation

A technology of interference suppression and satellite communication, which is applied in the field of satellite communication to achieve strong adaptability, suppress non-malicious interference, and reduce damage

Active Publication Date: 2021-12-21
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, for satellite communication system applications, it is inevitable to face resource conflicts or interference from other system signals

Method used

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  • Satellite communication non-malicious interference suppression method based on decision feedback adaptive cancellation
  • Satellite communication non-malicious interference suppression method based on decision feedback adaptive cancellation
  • Satellite communication non-malicious interference suppression method based on decision feedback adaptive cancellation

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Embodiment Construction

[0035] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0036] A non-malicious interference source suppression method based on decision feedback adaptive cancellation, comprising:

[0037] (1) The interference suppression method is based on the digital processing after ADC sampling, and realizes interference detection to the received broadband signal;

[0038] (2) The interference signal reconstruction is realized through the "demodulation + modulation" architecture, and the reconstruction uses a polynomial model to construct the nonlinear component of the interference;

[0039] (3) Taking the reconstructed interference signal as a reference, subtract it from the delayed received mixed signal, and use the iterative variable step size least mean square algorithm to perform adaptive cancellation;

[0040] (4) In the adaptive cancellation convergence state, the error signal o...

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Abstract

The invention discloses a satellite communication non-malicious interference suppression method based on decision feedback adaptive cancellation, and belongs to the technical field of satellite communication. The method can effectively solve the suppression problem of frequency domain overlapping non-malicious interference in satellite communication by utilizing the advantage that the non-malicious interference is easy to obtain priori knowledge such as frequency points and bandwidth, and is suitable for spread spectrum and non-spread spectrum satellite communication transmission links of different modulation modes. The interference suppression method has no special requirements on the modulation mode and spread spectrum processing of satellite communication signals, can be suitable for different satellite communication transmission links, and has strong adaptability.

Description

technical field [0001] The invention belongs to the technical field of satellite communication, in particular to a method for suppressing non-malicious interference in satellite communication based on decision feedback self-adaptive cancellation, which can be used in spread spectrum and non-spread spectrum satellite communication transmission systems of different modulation modes. Background technique [0002] At present, satellite communication has been widely used because of its advantages such as long communication distance and not being restricted by geographical features. At the same time, satellite communication covers multiple frequency bands from UHF, S, X, Ku and Ka, and the frequency range can reach dozens of GHz. Due to the wide frequency band of satellite communication and the openness of the transmission channel, its transmission link will inevitably face non-malicious strong interference from other systems or users, which will deteriorate the link transmission ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/185
CPCH04B7/18513Y02D30/70
Inventor 刘建成王赛宇潘申富王延鹏
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP