基于NLS的测距仪脉冲干扰抑制方法

中国民航大学学报

基于NLS的测距仪脉冲干扰抑制方法

李冬霞，李思，崔颜敏

（中国民航大学天津市智能信号与图像处理重点实验室，天津300300）

收稿日期:2015-01-06 修回日期:2015-03-13 出版日期:2016-04-23 发布日期:2016-06-03
作者简介:李冬霞（1971—），女，陕西榆林人，副教授，工学博士，研究方向为航空移动通信、甚高频数据链.
基金资助:
国家自然科学基金项目（U1233117，61271404）

DME pulse interference mitigation method based on NLS

LI Dongxia, LI Si, CUI Yanmin

(Intelligent Signal and Image Processing Key Lab of Tianjin, CAUC, Tianjin 300300, China)

Received:2015-01-06 Revised:2015-03-13 Online:2016-04-23 Published:2016-06-03

摘要/Abstract

摘要：

为解决测距仪脉冲干扰L 频段数字航空通信系统1（L-DACS1）正交频分复用（OFDM）接收机的问题，提出一种基于非线性最小二乘（NLS）准则的测距仪脉冲干扰抑制方法。该方法根据测距仪脉冲干扰的高功率特性，将测距仪脉冲信号作为目标信号，利用非线性最小二乘（NLS）准则估计测距仪脉冲信号的幅值与频率参数；然后重构测距仪脉冲信号，并将其从OFDM接收机接收信号中去除，达到干扰抑制的目的。仿真结果表明：所提出的基于NLS 的干扰抑制方法可有效重构测距仪脉冲信号，消除其对L-DACS1 系统的干扰，显著提高L-DACS1 系统链路传输的可靠性。

关键词: L 频段数字航空通信系统1, 正交频分复用, 测距仪脉冲干扰, 非线性最小二乘

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

中图分类号:

TN929.5
V249

李冬霞，李思，崔颜敏. 基于NLS的测距仪脉冲干扰抑制方法[J]. 中国民航大学学报.

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

参考文献

[1] FISTA S N, PHILLIPS B, BUDINGER J. Future Communications study—Action Plan 17 Final Conclusions and Recom-Mendations Report[C]//26th Digital Avionics Systems Conference（DASC）, Dallas，Texas，2007（4）：1-14.

[2] NEJI N, DE LACERDA R, AZOULAY A, et al. Survey on the future aeronautical communication system and its development for continental communications[J]. IEEE Transactions on Vehicular Technology,2013,62（1）：182-191.

[3] SCHNELL M, EPPLE U, SHUTIN D, et al. LDACS：Future aeronautical communications for air traffic management[J]. IEEE Communications Magazine，2014，52（5）：104-110.

[4] EPPLE U, SCHNELL M. Overview of legacy systems in L-band and its influence on the future aeronautical communication system L-DACS1[J]. IEEE Aerospace and Electronic Magazine, 2014, 29（2）：31-37.

[5] EPPLE U, HOFFMANN F, SCHNELL M. Modeling DME Interference Impact on LDACS1[C]//Integrated Communications, Navigation and Surveillance Conference（ICNS）, Herndon, VA, USA, 2012：G7-1-G7-13.

[6] EPPLE U, BRANDES S, GLIGOREVICS, et al. Receiver Optimization for L-DACS1[C]//IEEE/AIAA 28th Digital Avionics Systems Conference, Orlando, FL, USA, 2009：4. B. 1-1-4. B. 1-12.

[7] EPPLE U，SCHNELL M. Adaptive Threshold Optimization for a Blanking Nonlinearity in OFDMReceivers[C]//IEEE Global Communications Conference（GLOBECOM）, Anaheim, CA, USA, 2012：3661-3666.

[8] BESSON O, STOICA P. Frequency Estimation and Detection for SinusoidalSignalswithArbitraryEnvelope：ANonlinearLeast-SquaresApproach[C]//Proceedings of the 1998 IEEE International Conference on Acoustics，Speech and Signal Processing, 1998, 4：2209-2212.

[9] CHRISTENSENM G, JENSEN S H. New results on perceptual distortion minimization and nonlinear least-squares frequency estimation[J].IEEE Transactions on Audio, Speech, and Language Processing, 2011,19（7）：2239-2244.

[10] SAJATOVIC M, HAINDL B, EHAMMER M T, et al. LDACS1 System Definition Proposal: Deliverable D2[S]. Edition 1.0 ed. Europe：Europeanair Traffic Management，2009.

[11] 张贤达. 矩阵分析及应用[M]. 北京：清华大学出版社，2004：403-404.

[12] FANG W, WU R, WANG W, et al. DME Pulse Interference Suppression Based on NLS for GPS[C]//Signal Processing（ICSP）, 2012 IEEE 11th International Conference on. IEEE, 2012, 1：174-178.