Efficient synthetic aperture radar (SAR) processing algorithms are unable to compensate envelope errors caused by the instability of the antennas;because the traditional motion compensations (MoCo) of SAR processing p...
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In this paper, we present a new loop delay estimation algorithm to accurately calculate the loop delay in the digital predistortion system (DPD), the performance of which can be significantly degraded by loop delay mi...
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Cognitive radio (CR) is an emerging technology that can help the small LEO satellite constellation to provide services more efficiently without any assignment of an exclusive spectrum band. We only focus on the centra...
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Cognitive radio (CR) is an emerging technology that can help the small LEO satellite constellation to provide services more efficiently without any assignment of an exclusive spectrum band. We only focus on the centralized interference prediction in the uplink transmission due to the difficulty in implementation. In order to reduce the stress on the onboard computing and storing ability, the prediction scheme is divided into two parts that are completed on the satellite and on the ground respectively. Compared with the terrestrial system, the historical data of the interferences collected by the LEO satellite is very sparse. Therefore, we propose the novel scheme centroid-based global statistics (CGS) to utilize the data as much as possible for the statistics. Compared with the basic scheme Naive Local Statistics (NLS), CGS is experimentally validated to be less dependent on the parameter adjustment, more robust to the different interference environment, and has a better prediction performance under different conditions.
As a common high-speed interface,PCIe interface is very extensive in the field of data *** a development framework of Microsoft,WDF（Windows Driver Foundation）driver model can reduce the difficulty of the *** on the ...
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As a common high-speed interface,PCIe interface is very extensive in the field of data *** a development framework of Microsoft,WDF（Windows Driver Foundation）driver model can reduce the difficulty of the *** on the PCIe high-speed image acquisition card which is developed by ourselves,this paper designed a stable and reliable WDF driver for the high data transmission rate in the image acquisition process,and used the memory allocation method in WDF to share buffer with the *** order to enhance the speed of the image acquisition,this paper designed a ring buffer mechanism to ensure the continuity and stability in the image acquisition and transmission process.
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