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A direct sequence spread spectrum (DSSS) signal is commonly used in inter-satellite link (ISL) in navigation constellation; however, acquisition is a challenging task because of large-scale relative movement between satellites. In general, a signal search (carrier frequency and code phase) is implemented using two-dimensional partitioned fast Fourier transforms (FFTs), which is limited by the memory...
Comparing Unmanned Aerial Vehicle (UAV) video image patches is a fundamental task in UAV video image processing. The main difficulty lies in the wide variety of appearance changes in images taken under different UAV imaging conditions, such as jitter, changing points of view, frequent undefined motion, illumination changes and etc. The usual algorithms which are based on the hand-craft features and...
To evaluate the total ionizing dose vulnerability of spaceborne signal processing platform, an accelerated radiation experiment is set up and on-orbit prediction method is proposed. For signal processing platform which consists of SRAM-based FPGA and DSP, function parameter and current variety are the two criterion of experiment. 60Co γ radial radiation experiment indicates that total dose is about...
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