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This paper proposes the multiplexing technique that combines signal detector, decision logic, and anti-J modules to counteract narrowband continuous wave interference and spoofing signal in global navigation satellite system (GNSS) receivers. The signal detector is to detect the presence of different types of jammers. The decision logic is utilized to select different anti-jam strategies against jammers...
It is a difficult problem that targets are detected in nature background, especially in images corrupted by noise. In order to solve this problem, a method based on feature salience is proposed for targets automatic detection in nature background. Firstly, an adaptive wavelet thresholding method is used to denoise for noisy target images. Then minimum probability of error was been used to build to...
This paper utilizes a novel evolutionary approach to proceed with signal acquisition in Global Navigation Satellite Systems (GNSS). The method controls search space bound of frequency shift and code delay to shorten signal acquisition time. Simulation results show that the proposed scheme can acquire more accurate signal parameters and take less signal acquisition time than the traditional method.
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