Motion compensation is a key procedure in inverse synthetic aperture radar (ISAR) imaging. The authors regard the motion compensation as a multi-parameter estimation problem. Based on the designing structured Gram mat...
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Motion compensation is a key procedure in inverse synthetic aperture radar (ISAR) imaging. The authors regard the motion compensation as a multi-parameter estimation problem. Based on the designing structured Gram matrices optimisation method, a novel motion compensation method is presented. This method consists of two parts: the range alignment algorithm and the phase compensation algorithm. The former estimates the offset of each range profile by using a criterion, which makes correlations among all of the range profiles approaching to maximum values simultaneously. Also, the latter can extract phase errors by using the optimisation method to approach the ideal optimal matrix which is derived from analysis on the signal model. The measured data processing results show that the novel motion compensation method has strong robustness and high estimation accuracy.
One objective in developing the next generation of wireless communication systems is to increase data rates and reliability. A promising way to achieve this is to combine multiple-input and multiple-output signal proc...
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One objective in developing the next generation of wireless communication systems is to increase data rates and reliability. A promising way to achieve this is to combine multiple-input and multiple-output signal processing with a space-time coding scheme, which offers higher coding and diversity gains and improves the spectrum efficiency and reliability of a wireless communication system. It is noted, however that time delay differences and phase differences among different channels increase symbol interference and degrade system performance In this letter we investigate phase differences and their effects on multiple-input and multiple-output systems, and propose a compensationalgorithm for the Rayleigh fading model to minimize their effects.
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