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Acta Armamentarii ›› 2015, Vol. 36 ›› Issue (6): 1040-1045.doi: 10.3969/j.issn.1000-1093.2015.06.011

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Study of Reconnaissance Reception Algorithm of Wide-band Channelization in the Fractional Fourier Domain

DENG Bing, LUAN Jun-bao   

  1. (Department of Electronic and Information Engineering, Naval Aeronautical and Astronautical University,Yantai 264001, Shandong, China)
  • Received:2014-03-03 Revised:2014-03-03 Online:2015-08-03
  • Contact: DENG Bing E-mail:navy_dbing@tom.com

Abstract: Digital channelized receiver is currently the main stream of reconnaissance receivers. In order to reduce the equipment demand of band-folded channelized receiver, and remedy the shortages of output channel fuzzy, decrease in sensitivity, and reduction in interception probability, a receiving method of digital channelization is proposed based on fractional Fourier spectrum enfoldment, using the discrete fractional Fourier transform as the digital signal processing tool. The basic principle about the proposed method and the setting condition of some parameters are analyzed. The detail steps are provided. Finally, the simulation is made to prove the above-mentioned theories. The results show that the proposed method is used to eliminate the channel fuzzy if the recieved signal is divided into K simpling frequencies. The total power of output noise is only 1/K of tranditional band-folded channelized receiver.

Key words: information processing technology, signal detection, parameter estimation, wide-band channelization, fractional Fourier transform