DME pulse interference mitigation method based on NLS

Abstract

Abstract:

To mitigate the deleterious influence of distance measure equipment (DME)interference signals on orthogonal frequency division multiplexing (OFDM)receiver of L-band digital aeronautical communications system 1 (LDACS1), a new DME interference suppression method is proposed based on nonlinear least squares (NLS). The DME pulse is taken as the signal of interest because of its higher power characteristic; meanwhile, the frequency and complex amplitude of DME signal are estimated under the criterion of NLS. Then DME signal is reconstructed, and suppressed by subtracting the estimated DME signal from the received signal of OFDM receiver. Computer simulation indicates that the proposed method can reconstruct DME signal and reduce the impact of interference effectively, and improve the reliability of OFDMreceiver of L-DACS1 system significantly.

Key words: L-DACS1, OFDM, DME pulse interference, NLS

CLC Number:

TN929.5
V249

LI Dongxia, LI Si, CUI Yanmin. DME pulse interference mitigation method based on NLS[J]. .

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