论文信息 - Tracking loops with time-varying sampling periods for the TH-CDMA signal

Tracking loops with time-varying sampling periods for the TH-CDMA signal

Time-hopping signal structure is adopted for overcoming the near-far problem in the Ground-based Navigation System. The signal model of TH-CDMA signal is presented. To track the pulse signals with pseudorandom active-timeslot, tracking loops with time-varying sampling periods are designed. The linear model of the second order TVSP-PLL is presented. The stability of the time-varying model is analyzed based on the First Method of Lyapunov for the linear time-varying system. A transient-response simulation of the second order TVSP-PLL is provided as a verification. The ranging performance of the TVSP-DLL is evaluated. A hardware experiment and a MATLAB simulation are used to verify the noise performance of the TVSP-DLL. The tracking loops with time varying sampling periods are implemented on the FPGA platform and MATLAB. The simulation and experiment results show that the ranging accuracy can achieve centimeter level.

Kai Liu | Jun Yang | Xiye Guo

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