GPS-III L1C signal reception demonstrated on QZSS

Mattos, P.G.; Pisoni, Fabio

doi:10.1109/plans.2012.6236971

Cited by 2 publications

(3 citation statements)

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“…For joint positioning, the ephemeris needs to be modified in the algorithm to ensure that the orbit is correctly calculated. Concerning the reception performance, the BOC(1,1) and TMBOC(6,1,4/33) modulations used in the L1C signal are better improved [32,33]. Their auto-correlation function is shown in Figure 4.…”

Section: Receiving and Evaluation Methodologymentioning

confidence: 99%

“…Therefore, the choice of correlator spacing is considered when using a software-defined receiver for ranging and positioning, which will be discussed later. Concerning the reception performance, the BOC(1,1) and TMBOC(6,1,4/33) modulations used in the L1C signal are better improved [32,33]. Their auto-correlation function is shown in Figure 4.…”

Section: Receiving and Evaluation Methodologymentioning

confidence: 99%

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Receiving and Assessing L1C Signal for In-Orbit GPS III and QZSS Transmissions Using a Software-Defined Receiver

Huo

Wang

et al. 2019

Electronics

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To avoid signal interference in L1 frequency and provide various services, GPS has updated a modern signal, called L1C, which has been tested with three QZSS satellites launched in 2017. In December 2018, the first GPS III satellite was launched, which implies improved joint positioning using GPS and QZSS L1C signal. The L1C signal offers a series of advanced designs in signal modulation, message structure and coding. We present complete methodologies for joint L1C signal receiving and processing. For the transmitted signals, we present a methodology and results from collecting and assessing Binary Offset Carrier (BOC) modulation and time-multiplexed BOC (TMBOC) modulation used in the L1C signal. Using the same omnidirectional antenna and test equipment, we collected the L1C signal in Xi’an and Sanya, China, respectively. The experiments in Xi’an verify the joint positioning method to complement the GPS III and QZSS satellite constellations. Our methodology evaluates the ranging difference and positioning error of BOC and TMBOC modulation under the same environment and satellite constellation configuration in Sanya. It is also verified that the joint positioning error is less than the QZSS-only positioning due to the optimization of the satellite constellation.

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Section: Receiving and Evaluation Methodologymentioning

confidence: 99%

Section: Receiving and Evaluation Methodologymentioning

confidence: 99%

Receiving and Assessing L1C Signal for In-Orbit GPS III and QZSS Transmissions Using a Software-Defined Receiver

Huo

Wang

et al. 2019

Electronics

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“…To improve the communications quality and the antijamming capability of the spread spectrum communication system, the time division data modulation (TDDM) [1] mechanism is recommended based on the traditional modulation methods. The new mechanism will be used in the next generation global navigation satellite systems [2,3], for example, the GPS-III [4,5] system. The difference of the TDDM and the traditional modulation mechanism is that nondata element is permitted in the new signal, and the spread spectrum processing depends on the pseudonoise (PN) code odd or even scheduling.…”

Section: Introductionmentioning

confidence: 99%

An Optimization Synchronization Algorithm for TDDM Signal

Liu

Feng

2016

Journal of Electrical and Computer Engineering

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The time division data modulation (TDDM) mechanism is recommended to improve the communications quality and enhance the antijamming capability of the spread spectrum communication system, which will be used in the next generation global navigation satellite (GNSS) systems. According to the principle and the characteristics of TDDM signal, an optimization synchronization algorithm is proposed. In the new algorithm, the synchronization accuracy and environmental adaptability have been improved with the special local sequence structure, the multicorrelation processing, and the proportion threshold mechanism. Thus, the inversion estimation formula was established. The simulation results demonstrate that the new algorithm can eliminate the illegibility threat in the synchronization process and can adapt to a lower SNR. In addition, this algorithm is better than the traditional algorithms in terms of synchronization accuracy and adaptability.

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GPS-III L1C signal reception demonstrated on QZSS

Cited by 2 publications

References 0 publications

Receiving and Assessing L1C Signal for In-Orbit GPS III and QZSS Transmissions Using a Software-Defined Receiver

Receiving and Assessing L1C Signal for In-Orbit GPS III and QZSS Transmissions Using a Software-Defined Receiver

An Optimization Synchronization Algorithm for TDDM Signal

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