In this study, a novel compact controlled reception pattern antenna for global navigation satellite system (GNSS) applications is presented. Details of the design and the fabrication are given together with measurement results. The miniaturisation has been achieved by employing a five-element polarimetric array approach, resulting in anti-jamming capabilities for many applications where the antenna size is a major constraint. The antenna has a relatively wide bandwidth around the GNSS L1 band which contains many different GNSS signals. The anti-jamming performance of the antenna with respect to differently polarised jammers as well as its positioning capability are investigated
The frequency and signal design of the American Global Positioning System (GPS) is currently in a modernization period. The baseline configuration of GPS only consists of two signals on two carrier frequencies (C/A and P(Y) code). At present the existing satellites (IIA, IIR) are replaced by new modernized satellites (IIR-M, IIF) which are capable of transmitting additional signals. The modernization of GPS includes the extension of the frequency plan by a third frequency band (L5). We will evaluate the theoretical potential performance of the baseline signals and the new modernized signals of GPS in terms of positioning accuracy. This includes a discussion of the main error sources and the signal characteristics (signal modulation, carrier frequency and receiver bandwidth). Based on the contributions of the individual error sources we will give estimations of the typical performance of GPS for singlefrequency and double-frequency receivers.
The fourth order cumulants have been shown to increase the effective aperture of an antenna compared to second order cumulants. In this paper, we investigate the potential benefits of fourth order array processing methods for the direction of arrival estimation of GPS satellites. The purpose of this paper is to present the results obtained from real measurement data. The measurements have been carried out using our 7-element planar GPS antenna (L1-Band) and our 8-channel real-time recording system
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