| Microwave sparse Synthetic Impulse and Aperture Radar (SIAR) realize the orthogonality of the transmitted signals by frequency diversity and spatial diversity, the transmit array consists of sparse subarray, the receive array consists of dense subarray, which is also called Multi-Carrier-Frequency Multiple-Input Multiple-Output(MIMO) radar. Due to the receiving station is on moving platform, which results in more complex of the bistatic microwave sparse SIAR system synchronization. The synchronization technique and the influence of the synchronization errors to the distance, velocity and angle of the target which are based on a certain problem are mainly studied in this paper.Firstly, a brief introduction is given to the radar system, its characteristics and the radar's principle; then the experimentation system and the work mode of the collection data are introduced. The feasibility of the method of the signal processing is verified by the processing results of simulation data and practical data. Secondly, the common technique of the time synchronization and the frequency synchronization is introduced, the direct-path wave can be used to obtain the time synchronization is investigated, there are two methods, which are extended slipping window accumulation method and correlative detection method, the validity and the feasibility of the two methods are verified by simulation data and practical data. When the transmit/receive stations are in close proximity, the time synchronization using wired communications. For frequency synchronization we use an independent source of high stability frequency. Finally, the influence of the time synchronization error and frequency synchronization error to the distance, velocity and direction are studied. Under the condition of a certain resolution, the error bounds are quantitatively derived by analysis and simulation. |
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