基于DEHT的伪码引信中多分量FM干扰抑制方法研究
Multi-component FM Interference Excision Method Based on DEHT for Pseudo-random Coded Fuze
-
摘要: 在介绍离散进化变换(DET)和离散进化哈夫变换(DEHT)的基本原理基础上，详细分析了伪码引信中基于DEHT的多分量FM干扰抑制方法。接收信号首先通过DEHT估计干扰瞬时相位，并通过递归校正方法减小相位估计误差，利用估计出的干扰瞬时相位设计了一时变级联滤波器，逐个消去FM干扰。对不同干信比(ISR)情况下的干扰抑制前后的相关输出进行了仿真分析。分析结果表明，该方法能有效地去除干扰，相关输出得到显著改善。Abstract: The principle of Discrete Evolutionary Transform(DET) and Discrete Evolutionary Hough Transform(DEHT) are introduced. The method of excising multi-component FM interference for pseudo-random coded fuze system based on DEHT is analyzed in detail. The instantaneous phase of interference is firstly estimated with DEHT and the estimated phase error is decreased through recursive correcting. An adaptive time-varying filter based on the estimated instantaneous phase is set up to excise the interference one by one. The correlator output in different ISR situations is simulated. It is found by simulation that the method can effectively excise the interference and improve the correlator output.
-
Gloria Faye, Boudreaux-Bartels. Time-varying filtering and signal estimation using Wigner distribution synthesis technique[J].IEEE Trans. on Acoustics Speech Signal Processing.1986, 34(3):442-450[2]Lach S R, Amin M G, Lindsey A R. Broadband interference excision for software-radio spread-spectrum communications using time-frequency distribution synthesis[J].IEEE Journal on Selected Areas in Communications.1999, 17(4):704-714[3]Barbarossa S, Scaglione A. Adaptive time varying cancellation of wideband interferences in spread spectrum communications based on time-frequency distributions[J].IEEE Trans. on Signal Processing.1999, 47(4):957-965[4]Chaparro L F, Suleesathira Raungrong, et al.. Instantaneous frequency estimation using discrete evolutionary transform for jammer excision. 2001 IEEE International Conference on Acoustics, Speech, and Signal Processing, 2001, 6: 3525-3528.[5]Kayhan A S, El-Jaroudi A, et al.. Evolutionary periodogram for nonstationary signals[J].IEEE Trans. on Sig. Process.1994, 42(6):1527-1536[6]Coifman R R, Wickerhauser M V. Entropy-based algorithms for best basis selection[J].IEEE Trans. Info. Theory.1992, 38(2):713-718 -
计量
- 文章访问数: 2285
- HTML全文浏览量: 98
- PDF下载量: 719
- 被引次数: 0
下载:
