Development of Robust Safety-of-Life Navigation Receivers

Heckler, Marcos V. T.; Cuntz, Manuel; Konovaltsev, Andriy; Greda, Lukasz; Dreher, Achim; Meurer, Michael

doi:10.1109/tmtt.2010.2103090

Cited by 30 publications

(19 citation statements)

References 3 publications

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“…When a regular grid is employed, which is nonuniform on the sphere but often used for antenna measurements, it should be ensured that U Q [39]. OnceĜ has been found, the interpolation can be performed by (13). For basis functions (14) and (18), (19) is equivalent to performing a Fourier transform.…”

Section: B Wavefield Modeling and Manifold Separationmentioning

confidence: 99%

“…Contrarily, this paper highlights the usage of MMAs for positioning purposes, specifically for direction-of-arrival (DoA) estimation [10]- [12]. DoA is an essential part for numerous applications like robust global navigation satellite system (GNSS) receivers [13], multipath assisted positioning [14] and channel modeling [15]. While MMAs could be used for all of these applications, we highlight two potential applications for DoA where MMAs are especially suited.…”

Section: Introductionmentioning

confidence: 99%

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On the Potential of Multi-Mode Antennas for Direction-of-Arrival Estimation

Pöhlmann

Almasri

Zhang

et al. 2019

IEEE Trans. Antennas Propagat.

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A multi-mode antenna (MMA) can be an interesting alternative to a conventional phased antenna array for directionof-arrival (DoA) estimation. By MMA we mean a single physical radiator with multiple ports, which excite different characteristic modes. In contrast to phased arrays, a closed-form mathematical model of the antenna response, like a steering vector, is not straightforward to define for MMAs. Instead one has to rely on calibration measurement or electromagnetic field (EMF) simulation data, which is discrete. To perform DoA estimation, an array interpolation technique (AIT) and wavefield modeling (WM) are suggested as methods with inherent interpolation capabilities, fully taking antenna nonidealities like mutual coupling into account. We present a non-coherent DoA estimator for low-cost receivers and show how coherent DoA estimation and joint DoA and polarization estimation can be performed with MMAs. Utilizing these methods, we assess the DoA estimation performance of an MMA prototype in simulations for both 2D and 3D cases. The results show that WM outperforms AIT for high SNR. The coherent estimation is superior to non-coherent, especially in 3D, because non-coherent suffers from estimation ambiguities. In conclusion, DoA estimation with a single MMA is feasible and accurate.

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Section: B Wavefield Modeling and Manifold Separationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

On the Potential of Multi-Mode Antennas for Direction-of-Arrival Estimation

Pöhlmann

Almasri

Zhang

et al. 2019

IEEE Trans. Antennas Propagat.

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“…In order to ensure robust navigation and protect receivers from malicious attacks, the use of adaptive antenna arrays has been proved to be particularly useful [2], [3], thanks to their capability to direct the beams towards the desired signals, while nulling the reception capability from the directions of interferers [4].…”

Section: Introductionmentioning

confidence: 99%

Compact E5a/E1 antenna array for GNSS applications

Caizzone

2016

2016 10th European Conference on Antennas and Propagation (EuCAP)

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This work shows the design and manufacturing of a compact antenna array for use as controlled radiation pattern array (CRPA) in satellite navigation applications. The array has dual band capability for the Galileo Global Navigation Satellite System (GNSS) at E5a and E1 bands. The overall size of the array is only 10 cm x 10 cm and this enables it to be used in applications where compactness is a key factor. The small dimension of the array implies a close arrangement of the antennas, thus producing mutual interaction between the elements, with potential performance degradation. A solution to such problem is proposed in the paper, making use of a metallic wall, managing to reduce the coupling.

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“…Li et al [4] proposed a beamforming architecture for real Intermediate Frequency (IF) signals and calculated optimum weights from given GPS almanac. Heckler et al [5] developed a four-element antenna array and front-ends for dual-band L1/L5 signals. They also implemented a MATLAB-based software receiver for field test of adaptive beamforming algorithms with directions of satellites calculated from DoA estimation.…”

Section: Introductionmentioning

confidence: 99%

Design and Implementation of Real-Time Software Radio for Anti-Interference GPS/WAAS Sensors

Chen

Juang

Seo

et al. 2012

Sensors

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Adaptive antenna array processing is widely known to provide significant anti-interference capabilities within a Global Navigation Satellite Systems (GNSS) receiver. A main challenge in the quest for such receiver architecture has always been the computational/processing requirements. Even more demanding would be to try and incorporate the flexibility of the Software-Defined Radio (SDR) design philosophy in such an implementation. This paper documents a feasible approach to a real-time SDR implementation of a beam-steered GNSS receiver and validates its performance. This research implements a real-time software receiver on a widely-available x86-based multi-core microprocessor to process four-element antenna array data streams sampled with 16-bit resolution. The software receiver is capable of 12 channels all-in-view Controlled Reception Pattern Antenna (CRPA) array processing capable of rejecting multiple interferers. Single Instruction Multiple Data (SIMD) instructions assembly coding and multithreaded programming, the key to such an implementation to reduce computational complexity, are fully documented within the paper. In conventional antenna array systems, receivers use the geometry of antennas and cable lengths known in advance. The documented CRPA implementation is architected to operate without extensive set-up and pre-calibration and leverages Space-Time Adaptive Processing (STAP) to provide adaptation in both the frequency and space domains. The validation component of the paper demonstrates that the developed software receiver operates in real time with live Global Positioning System (GPS) and Wide Area Augmentation System (WAAS) L1 C/A code signal. Further, interference rejection capabilities of the implementation are also demonstrated using multiple synthetic interferers which are added to the live data stream.

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Development of Robust Safety-of-Life Navigation Receivers

Cited by 30 publications

References 3 publications

On the Potential of Multi-Mode Antennas for Direction-of-Arrival Estimation

On the Potential of Multi-Mode Antennas for Direction-of-Arrival Estimation

Compact E5a/E1 antenna array for GNSS applications

Design and Implementation of Real-Time Software Radio for Anti-Interference GPS/WAAS Sensors

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