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Suppression method of DME pulse interference based on wavelet transformation

LIU Hai-tao,LIANG Guang-xi   

  1. (College of Electronic Information Engineering,CAUC,Tianjin 300300,China)
  • Received:2014-01-15 Revised:2014-04-04 Online:2015-06-22 Published:2015-07-08

Abstract:

To solve the problem that L-band digital aeronautical communications system 1 (L-DACS1)receiver is always interfered by DME (distance measuring equipment)pulse signals,which is caused by L-band DACS1 deployed in the gaps between two adjacent channels of DME system in L -band,a DME pulse interference suppression receiver is proposed for L-band DACS1 with wavelet transform denoising method. Utilizing the signal characteristics of L-DACS1 and DME system,the DME pulse signal is reconstructed based on wavelet transform denoising method,and the reconstructed DME pulse signal is eliminated from the received signals in time domain. Simulation results show that the proposed receiver scheme can significantly improve the link transmission reliability under the environment of additive white gaussian noise channel and multipath fading channel.

Key words: OFDM, L-DACS1, DME, wavelet transformation

CLC Number: