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This paper presents an innovative Doppler frequency estimation technique, which is particularly suited for global navigation satellite system (GNSS) receivers operating in vehicular scenarios. Mass-market and commercial navigation devices are being increasingly exploited for in-car navigation and for vehicular applications based on positioning. However, the low computational burden that can be afforded...
In this paper, a novel algorithm for carrier frequency estimation is described, whose basic principle is to exploit an iterative mechanism to refine the estimate by progressively reduce the noise subspace. This is accomplished by means of an external denoising system, fed by the master estimation algorithm, in order to feed the basic estimation block with enhanced data at next iteration. In this paper,...
It is known that signal acquisition can be treated as a two-dimensional search and all the possible results are located in the search plane as different cells. In this paper, the theoretical expression of the cross-ambiguity function (CAF) is analyzed, and the property of the approximate expression is exploited, while it is seldom addressed in previous GNSS receiver architectures. Based on the property...
The aim of this paper is to design the loop coefficients in real time in order to obtain a good trade-off in terms of performance with respect to both noise and to dynamics. In this work the optimization is performed while considering an input signal whose frequency assumes a generic shape. A cost function is built which takes into account in the same time both the transient and the steady state error...
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