LFM Interference Suppression in FRFT Domain Based on Hypothesis Testing

FENG Ji-ning;DIAO Zhe-jun;YANG Xiao-bo;WU Si-liang

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  • Sponsored by: China Association for Science and Technology (CAST)

    Editor-In-Chief: Xu Yida

    ISSN 1000-1093

    　

  • Hosted By: China Ordnance Society

    Published By: Acta Armamentarii

    CN 11-2176/TJ

Acta Armamentarii, a Chinese monthly journal, was first published in 1979. The journal is supervised by China Association for Science and Technology, sponsored by China Ordnance Society，and edited and published by Editorial Board of Acta Armamentarii. The Journal is included in all important domestic databases，and also collected by Engineering Index (EI, USA), Chemical Abstracts (CA, USA), Science Abstracts (SA, UK）, Abstract Journal (AJ, Russia), and Current Bibliography on Science and Technology(CBST).Acta Armamentarii has been selected into the journal Of Ordnance Science and Technology (Weapons Industry) Field Of High Quality Scientific and Technological Periodical Classification Catalogue (2022 edition), ranking T1, and the journal of Automotive Engineering Field of High Quality Scientific and technological Periodical classification Catalogue, ranking T2.
Acta Armamentarii ›› 2012, Vol. 33 ›› Issue (1) : 7-12. DOI: 10.3969/j.issn.1000-1093.2012.01.002
Paper

LFM Interference Suppression in FRFT Domain Based on Hypothesis Testing

  • FENG Ji-ning1 3， DIAO Zhe-jun1， YANG Xiao-bo2， WU Si-liang3
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Abstract

Refering to the problem that it is difficult to set the exact threshold of LFM interference suppression in FRFT domain, the defect of fixed threshold algorithm and adaptive threshold algorithm is analyzed. Under the condition that only the direct sequence spread spectrum signal and additive Gaussian noise are present at the receiver, the amplitude of received signal after FRFT is assumed to be Rayleigh distributed. Based on the distribution characteristics, a novel LFM interference suppression algorithm based on hypothesis testing is proposed. The simulation results show the validity of the algorithm.

Key words

communication technology / direct sequence spread spectrum / FRFT domain / linear frequency modulate / interference suppression

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FENG Ji-ning， DIAO Zhe-jun， YANG Xiao-bo， WU Si-liang. LFM Interference Suppression in FRFT Domain Based on Hypothesis Testing. Acta Armamentarii. 2012, 33(1): 7-12 https://doi.org/10.3969/j.issn.1000-1093.2012.01.002

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