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基于FFT和FRFT的非平稳干扰估计和抑制 被引量：3

Estimation and Suppression of Broadband Non-stationary Interference Based on FFT and FRFT
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摘要 提出了一个基于快速傅里叶变换(FFT)和分数阶傅里叶变换(FRFT)的线性频率调制(LFM)干扰参数的估计和抑制方法。通过FFT粗略估计和FRFT精确估计,确定LFM干扰在分数阶傅里叶域所处的旋转角度,估计出LFM的相关参数,利用最小二乘法综合出LFM干扰信号;然后从接收的信号中减去,有效地抑制LFM干扰。性能仿真分析表明,该方法较好地改善了误码率性能,降低了计算的复杂度,提高了系统处理的实时性。 A fast Fourier transform（FFT） and fractional Fourier transform（FRFT）-based interference suppression scheme for wideband nonstationary interference is proposed in direct sequence spread spectrum communication. The interference parameters are coarsely estimated by FFT and are accurately estimated by FRFT. The nonstationary interference can be synthesized from received signals by least-squares methods. The synthesized interference is subtracted from the received signals in the time domain and the signal-to-interference ratio is increased on the input of the correlator. Compared with the masking interference excision method, the scheme is more stable on bit error rate （BER） performance and simple on the computational complexity.
作者 邵高平 安建平
机构地区 北京理工大学信息与电子学院 解放军信息工程大学信息工程学院
出处 《数据采集与处理》 CSCD 北大核心 2010年第2期160-164,共5页 Journal of Data Acquisition and Processing
关键词 直接序列扩频 干扰抑制 线性频率调制 傅里叶变换 分数阶傅里叶变换 direct sequence spread spectrum interference suppression linear frequency modulation Fourier transform fractional Fourier transform
分类号 TN911.7 [电子电信—通信与信息系统]
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参考文献14

  • 1Laster J D,Reed J H.Interference rejection in digital wireless communications[J].IEEE Signal Processing Magazine,1997,14(3):37-62.
  • 2Poor H V.Active interference suppression in CDMA overlay systems[J].IEEE Journal on Selected Areas in Communications,2001,19(1):4-20.
  • 3Barbarossa S,Scaglione A,Spalletta S,et al.Adaptive suppression of wideband interferences in spread-spectrum communications using the Wigner-Hough transform[C]// Proc IEEE ICASSP'97.Munich,Germany:IEEE Press,1997:3861-3864.
  • 4Barbarossa 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.
  • 5Amin M G,Mandapati G R.Nonstationary interference excision in spectrum communication using projection filtering methods[C]// Proc IEEE ICASSP'98.Pacific,Grove,CA:IEEE Press,1998:827-831.
  • 6Shen Hao,Papandreou-Suppappola A.Wideband time-varying interference suppression using matched signal transforms[J].IEEE Trans on Signal Processing,2005,53(7):2607-2612.
  • 7Chetwani S,Papandreou-Suppappola A.Time-varying interference suppression in communication systems using time-frequency signal transforms[C]// Proc Asilomar Conf Signals,Syst Comput.Califonria:IEEE Press,2000:460-464.
  • 8Lach S R,Amin M G,Lindsey A R.Broadband interfereence excision for software-radio spread-spectrum communications using time-frequency distribution synthesis[J].IEEE Journal on Selected Area in Communications,1999,17(4):704-714.
  • 9Amin M G,Wang Chenshu,Lindsey A R.Optimum interference excision in spread spectrum communications using open-loop adaptive filters[J].IEEE Trans on Signal Processing,1999,47(7):1966-1976.
  • 10Akay O,Boudreaux-Bartels G F.Broadband interference excision in spectrum communication systems via fractional fourier transform[C]// Proc Asilomar Conf Signals Syst Comput.Califonria:IEEE Press,1998:832-837.

二级参考文献31

  • 1Boashash B. Estimating and interpreting the instantaneous frequency of a signal. Proc IEEE, 1992, 80(4): 519-569.
  • 2Diuric P M. Kay S M. Parameter estimation of china signal. IEEE Trans on ASSP, 1990, 38(12): 2118-2126.
  • 3Barbarossa S, Petrone V. Analysis of polynomial-phase signals by the integrated generalized ambiguity function. IEEE Trans on SP, 1997, 45(2): 316-327.
  • 4Abatzoglou T J. Fast maximum likelihood joint estimation of frequency and frequency rate. IEEE Trans on AES, 1986, 22(6):708-715.
  • 5Peleg S, Porat B. Linear FM signal parameter estimation from discrete-time observations. IEEE Trans on AES, 1991, 27(4):607-615.
  • 6Haimovich A M, Peckham C, Teti J G, et al. SAR imagery of moving targets: Application of time-frequency distributions for estimating motion parameters. In: Proc 1994 SPIE's International Symposium on Aerospace and Sensing, 1994. 2238:238-247.
  • 7Rao P, Taylor F J. Estimation of instantaneous frequency using the discrete wigner distribution. Electronics Letters, 1990,26(4): 246-248.
  • 8Choi H, Williams W J. Improved time-frequency representation of multicomponent signals using exponential kernels. IEEE Trans on SP, 1988, 37(6): 862-871.
  • 9Barbarossa S. Analysis of multicomponent LFM signals by a combined Wigner-Hough transform. IEEE Trans On SP, 1995,43(6): 1511-1515.
  • 10Namias V. The fractional Fourier transform and its application in quantum mechanics. J Inst Appl Math, 1980, 25:241-265.

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数据采集与处理
2010年 第2期

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