Analysis of GPS P(Y) signal power enhancement based on the observations with a semi-codeless receiver

Tang, Xiaomei; Yuan, Muzi; Wang, Feixue

doi:10.1186/s43020-022-00087-x

Cited by 3 publications

(1 citation statement)

References 21 publications

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“…Tang Jun proposed a method to calculate the baseline angle and then calculate the area based on the coordinates measured using two handheld GPS receivers. The accuracy of this method was higher than that of the single-machine operation method, with an accuracy of approximately 0.5% [21]. Dong designed and developed a handheld embedded farmland area measurement terminal that supports multiple GPS positioning methods.…”

Section: Introductionmentioning

confidence: 99%

A Real-Time Measurement Method and System for the Harvesting Area of a Grain Combine Harvester

Chen,

Jin,

Yang

et al. 2023

Sustainability

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A real-time system for measuring harvesting area is crucial for cross-regional operation. In response to the current situation where significant errors often occur in measuring the areas of small and irregular fields, we designed a low-cost and high-precision online real-time measurement system for the harvesting area of grain combines. The real-time measurement hardware system for measuring area was designed using an STM32 microcontroller as the core unit. The system was developed using three modes: intelligent measurement, circular measurement, and fusion measurement. Simulation and field experiments were conducted to verify the performance of the system. The experimental results showed that in the field simulation experiment with four differently shaped operating areas, the average accuracy of the intelligent mode reached 93.76%, and the average accuracy of the circular mode reached 95.48%. In the field experiments, the average accuracy of the intelligent mode reached 95.09%, the average accuracy of the circular mode reached 95.74%, and the average accuracy of the fusion measurement mode reached 98.01%. Therefore, the real-time measurement system for the harvesting area of a grain combine harvester designed in this study has high accuracy when measuring the area of small and irregular farmland, hence meeting the requirements of the design objectives.

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Section: Introductionmentioning

confidence: 99%

A Real-Time Measurement Method and System for the Harvesting Area of a Grain Combine Harvester

Chen,

Jin,

Yang

et al. 2023

Sustainability

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Effects of BDS flex power on DCB estimation and PPP convergence

Wu,

Li,

Wan

et al. 2023

GPS Solut

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Improving the Pulse-Limited Footprint Resolution of GNSS-R Based on the Novel Joint Bandwidth Method

Cui,

Zheng,

et al. 2023

Remote Sensing

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The bistatic global navigation satellite system’s (GNSS) signal reflection technology has become an effective means of space-based sea surface wind field retrieval and height retrieval. By adopting a wider signal bandwidth, a higher pulse-limited footprint resolution can be achieved. However, for the GNSS-Reflectometry (GNSS-R) system, its signal bandwidth is affected by the signal bandwidth of the GNSS satellite, which limits the further improvement of the pulse-limited footprint resolution. This article proposes a method based on the novel signal bandwidth joint principle to improve the resolution of GNSS-R pulse-limited footprints. Firstly, currently in-orbit GNSS-R satellites use the traditional single frequency band (TSFB) method, which is limited by the GNSS satellite’s signals and has a theoretical upper limit on its signal bandwidth. In response to this issue, this article proposes the novel joint bandwidth (NJBW) method (Galileo E5a and E5b signals) based on the auto-correlation function (ACF) signal ambiguity theory. The NJBW method reduces the main lobe width of the ACF of the GNSS-R signal by jointly processing the signals of E5a and E5b frequency bands, thus improving the pulse-limit footprint resolution of GNSS-R. Secondly, in order to verify the improvement effect of the novel joint bandwidth method on the pulse-limited footprint resolution of GNSS-R, this paper designs and fabricates an NJBW antenna verification prototype for the joint Galileo E5a and E5b frequency band and tests it in a microwave anechoic chamber. The test results indicate that the radio frequency (RF) bandwidth of the NJBW antenna validation prototype can cover both the frequency bands of E5a and E5b, making it suitable for use as the NJBW method for the GNSS-R receiving antenna. The bandwidth test values of the NJBW antenna validation prototype are consistent with the design values, which verifies the correctness of the NJBW antenna design model and further proves the feasibility of the NJBW method. Thirdly, based on the joint Galileo E5a and E5b frequency band signals, the NJBW method was applied to analyze the improvement effect of the pulse-limited footprint resolution. Compared to the TSFB method, the application of the NJBW method can increase the resolution of the GNSS-R pulse-limiting footprint by 1.73 times, which effectively improves the performance of the GNSS-R system. The NJBW method proposed in this article provides the theoretical method foundation and key technical support for sea surface wind field retrieval and height retrieval and the antenna design for the future high-precision and high pulse-limited footprint resolution GNSS-R sea surface wind field retrieval and height retrieval verification satellite.

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Analysis of GPS P(Y) signal power enhancement based on the observations with a semi-codeless receiver

Cited by 3 publications

References 21 publications

A Real-Time Measurement Method and System for the Harvesting Area of a Grain Combine Harvester

A Real-Time Measurement Method and System for the Harvesting Area of a Grain Combine Harvester

Effects of BDS flex power on DCB estimation and PPP convergence

Improving the Pulse-Limited Footprint Resolution of GNSS-R Based on the Novel Joint Bandwidth Method

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