SAR (Synthetic Aperture Radar) imaging signal processing data transposing method based on FPGA (Field Programmable Gata Array)
A technology for processing data and imaging signals, which is used in the design of synthetic aperture radar imaging systems, and uses FPGA to realize the field of SAR imaging signal processing data transposition, which can solve problems such as incompatibility with on-board systems, and achieve low power consumption, stable operation, and improved performance. The effect of work efficiency
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[0031] The present invention will be further described below in conjunction with the accompanying drawings.
[0032] The present invention transposes the SAR imaging signal processing data through FPGA, and the FPGA chip used is StratixIII EP3SL340H1152I3, or StratixII EP2S90F1020I4 model, but not limited to these two.
[0033] refer to figure 1 , the specific implementation steps of the present invention are as follows:
[0034] Step 1. The SAR imaging signal processing data is continuously transmitted to the FPGA from the front end according to the distance, and then the FPGA stores the data into the DDRII SDRAM memory to form matrix data.
[0035] Since the throughput rate of the user side and the DDRII SDRAM memory side are different, this step is mainly to call the asynchronous FIFO memory in the FPGA to cache the data, and at the same time realize the synchronization of the clocks at both ends of the FIFO.
[0036] Step 2. Carry out matrix division of the matrix data i...
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