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The impact of time synchronization error on passive coherent pulsed radar system

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Abstract

Passive bistatic coherent radar system operates with distinct non-cooperative transmitter and receiver located at different sites. In such spatial separation, the receiving system needs to independently solve the problem of time and phase synchronization via direct-path signal. The impact of time synchronization error was explored and solved in passive bistatic coherent radar. The common model of digital sampling process is introduced to illustrate the effect of time synchronization error (TSE). The periodicity of relative sample instant variation of each pulse is deduced. Then, normalized interference power (NIP) is defined to evaluate the potential impact of TSE. The NIP expressions are derived when the difference between the adjacent relative sample instant is uniform distribution or Gaussian distribution. It is found that there are new spurious frequency components and the detection performance is decreased in the case of asynchronous sampling. At the same time, the analytical Doppler frequency bias expression caused by TSE is presented. Theoretical results are confirmed by simulation in the cases of different periods of relative sampling instant.

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Authors and Affiliations

  1. Research Institute of Information Fusion, Naval Aeronautical and Astronautical University, Yantai, 264001, China

    You He, CaiSheng Zhang & XiaoMing Tang

  2. Nanjing Research Institute of Electronics Technology, Nanjing, 210039, China

    CaiSheng Zhang & JiaHui Ding

Authors
  1. You He
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  2. CaiSheng Zhang
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  3. JiaHui Ding
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  4. XiaoMing Tang
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He, Y., Zhang, C., Ding, J. et al. The impact of time synchronization error on passive coherent pulsed radar system. Sci. China Inf. Sci. 53, 2664–2674 (2010). https://doi.org/10.1007/s11432-010-4110-x

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  • DOI: https://doi.org/10.1007/s11432-010-4110-x

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