| In modern wars, radar play a immeasurable role,short-range surveillance radar can invasion of infantry.tank and other ground moving target around the clock. Pseudorandom Code interrupted continuous wave system can effectively improve the performance of ground surveillance radar. The Pseudorandom Code interrupted continuous wave, as a new system, can improve the performance of ground surveillance radar,and widespread concern and research.Firstly the paper analyzes the echo model of Pseudorandom Code interrupted continuous wave radar and discusses the noise and clutter in the working environment. Then a clutter signal of Weibull distribution is simulated by MALTAB using zero memory nonlinear transformation (ZMNL), and the correctness of clutter distribution is verified with the histogram and probability distribution diagram. On that basis, the Pseudorandom Code interrupted continuous wave radar signal processing system is designed and implemented by MALTAB that able to process of the simulation echo signal and radar signal. The processing module includes pulse compression, rearrangement of the data, power spectrum estimation and CFAR. Signal processing algorithm is obtained by computer simulation, which satisfies the requirements of the system and is suitable for hardware implementation. The algorithm includes the design of sidelobe suppression filter of 13 Barker code that is especially suitable for digital processing. The processing results of the echo signal in clutter verify that the algorithm designed in this paper can detect the target and get the distance, speed, strength and other information about it.In the end of the paper, flow chart of the software design on DSP in the system design will be introduced. Then design the DSP software of the signal processing based on TMS320C6416 and make test after the algorithm and performance evaluation are completed in the hardware platform. The experimental results verify the effectiveness and correctness of the algorithm. |
PDF Full Text Request