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GPS satellite signal acquisition is based on the correlation characteristics of C/A codes. This paper introduces two important properties of C/A codes, and analyzes the impact of Doppler shift on the received signal in case of high dynamic environment. FFT-based parallel code phase search acquisition algorithm is introduced and a new algorithm is presented to improve the FFT and IFFT modules by translating...
A tipping curve technique is widely used for the calibration of a ground-based radiometer for convenience. We make use of this method to calibrate a new W band radiometer recently in this paper. Based on the principle of a radiometer, the tipping curve calibration equation is derived. Some initial experiment results verify the validation of the method.
Imagery data acquired directly by passive millimeter-wave (PMMW) radiometer are inherently poor resolution due to the limited operating frequency and antenna aperture, so it need to adopt some super-resolution (SR) algorithms to improve the resolution to strengthen the target identification or other useful applications. In this paper, the process of PMMW imaging modeling is analyzed, and the projection...
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