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An anti-interference ds-gmsk receiving method and device suitable for satellite communication

A DS-GMSK, satellite communication technology, applied in the field of satellite communication to achieve the effect of improving computing efficiency, reducing out-of-band radiation, and enhancing anti-noise and anti-interference capabilities

Active Publication Date: 2021-03-26
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the anti-jamming DS-GMSK receiving method and device suitable for satellite communication disclosed by the present invention is: combining DSSS and GMSK can enhance the anti-noise and anti-jamming capabilities while improving spectrum utilization, Reducing out-of-band radiation has broad application prospects in the field of satellite communications

Method used

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  • An anti-interference ds-gmsk receiving method and device suitable for satellite communication
  • An anti-interference ds-gmsk receiving method and device suitable for satellite communication
  • An anti-interference ds-gmsk receiving method and device suitable for satellite communication

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Embodiment 1

[0032] like figure 1 As shown, an anti-interference DS-GMSK receiving device suitable for satellite communication disclosed in this embodiment includes a down-conversion module, a frequency offset compensation module, a code phase tracking adjustment module, a capture and despreading demodulation switching module, and a capture module And a despreading demodulation module.

[0033] The down-conversion module is used for performing quadrature down-mixing on the received intermediate frequency DS-GMSK signal, and outputting IQ two-way DS-GMSK baseband signals.

[0034]The frequency offset compensation module generates a compensation carrier through DDS according to the frequency offset value output by the capture module, and performs frequency offset compensation on the down-mixed DS-GMSK baseband signal.

[0035] The code phase tracking adjustment module adjusts the data start position input to the capture module or the despreading demodulation module according to the code pha...

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Abstract

The invention discloses an anti-interference DS-GMSK receiving method and an anti-interference DS-GMSK receiving device suitable for satellite communication, and belongs to the technical field of satellite communication. The DS-GMSK has the advantages of a direct sequence spread spectrum system, works in a low signal-to-noise ratio environment, and is high in anti-interference capability; and meanwhile, the characteristics of high GMSK modulation spectrum utilization rate and low out-of-band radiation power are combined, so that the spectrum utilization rate is improved and the out-of-band radiation is reduced while the anti-noise and anti-interference capabilities are enhanced. By using FFT and IFFT operations, the operation efficiency of a capture and demodulation algorithm is significantly improved, and the anti-interference DS-GMSK receiving method suitable for satellite communication is more applicable to implementation of an FPGA platform. The anti-interference DS-GMSK receivingdevice comprises a down-conversion module, a frequency offset compensation module, a code phase tracking adjustment module, a capture module and a dispreading demodulation module. According to the anti-interference DS-GMSK receiving method and the anti-interference DS-GMSK receiving device, the DSSS and the GMSK are combined, the anti-noise and anti-interference capabilities are enhanced, the spectrum utilization rate is improved, the out-of-band radiation is reduced, and the method and the device have a wide application prospect in the field of satellite communication.

Description

technical field [0001] The invention relates to an anti-jamming DS-GMSK (direct sequence spread spectrum Gaussian minimum shift keying) receiving method and device suitable for satellite communication, belonging to the technical field of satellite communication. Background technique [0002] In this era of informationization and globalization, satellite communication is an important and indispensable communication method. Compared with general civilian communication methods, satellite communication often needs to work in a communication environment with low signal-to-noise ratio and strong interference, and also puts forward high requirements for confidentiality and anti-interception. [0003] BPSK and other modulation methods are often used in satellite communication, but BPSK has spectrum broadening due to the sudden change of carrier phase between symbols, and the power spectrum will produce strong side lobe components, and the spectrum utilization rate is not high; and B...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/14H04L27/16H04B1/7087H04B1/7075
CPCH04B1/7075H04B1/7087H04L27/14H04L27/16
Inventor 安建平卢琨宋哲王帅方金辉岳平越闫伟豪张昊星
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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