Compass-M1 Broadcast Codes in E2, E5b, and E6 Frequency Bands

Gao, Grace Xingxin; Chen, A.; Lo, Sherman; Lorenzo, David; Walter, Todd; Enge, Per

doi:10.1109/jstsp.2009.2025635

Cited by 38 publications

(32 citation statements)

References 4 publications

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“…The complete Compass constellation will most likely consist of 30 satellites in six orbital planes in MEO and five additional satellites on geostationary or inclined geosynchronous orbits over China. Soon after the launch on April 13, 2007, researchers started to decode the satellite's PRN code sequence with directive antennas (Greilier et al 2007;Gao et al 2009) and to analyze the signals with software and hardware receivers (Gao et al 2009;De Wilde et al 2007). …”

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confidence: 99%

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Characterization of Compass M-1 signals

et al. 2011

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An analysis of observations from China's first medium earth orbit satellite Compass M-1 is presented, with main focus on the first orbit and clock solution for this satellite. The orbit is computed from laser ranging measurements. Based on this orbit solution, the apparent clock offset is estimated using measurements from two GNSS receivers, which allow Compass tracking. The analysis of the clock solutions reveals unexpectedly high dynamics in the pseudorange and carrier-phase observations. Furthermore, carrier-to-noise density ratio, pseudorange noise, and multipath are analyzed and compared to GPS and GIOVE. The results of the clock analysis motivate further research on the signals of the geostationary satellites of the Compass constellation.

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confidence: 99%

“…Contrary to the filings at the International Telecommunication Union (ITU), the fourth frequency E1 at 1,589.74 MHz is apparently not utilized (Gao et al 2009). Over the previous years of operation, the modulations of the satellite signals on the different frequencies have apparently been changed (Perelló Gisbert et al 2009).…”

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confidence: 99%

Characterization of Compass M-1 signals

et al. 2011

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“…The BDS code structure is analyzed by using high gain parabolic antennas at two stations located at (Grelier et al 2007) CNES (Toulouse, France) and Leeheim (Germany). Gao et al decoded the M1 satellite's codes in the E2, E5b and E6 bands, extracted the code bits, and derived the code generators (Gao et al 2009). All GPS satellites' ephemerides can employ a uniform parameter, as the GPS constellation consisted of only MEO satellites.…”

Section: Introductionmentioning

confidence: 99%

Accuracy analysis of GPS/BDS relative positioning using zero-baseline measurements

Roberts

Tang

2018

J. Glob. Position. Syst.

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This paper focuses on assessing the precision of carrier phase relative positioning using GPS-only, BDS-only and GPS/BDS measurements. A zero baseline is used in order to achieve this. Software for GPS and BDS processing has been developed, allowing static and kinematic data processing, as well as the combined GPS and BDS processing. Ionospheric and tropospheric delays are significantly reduced by double differencing between satellites and receivers, but the Multipath signals are still a major source of error for the various general GNSS baseline applications. In this paper, two Multi-GNSS receivers are connected to one antenna by an antenna splitter. This strategy results in all the delays or errors being mitigated, leaving only the random measurement noises resulted from the double difference processing. The time series of the final baseline error reveal that both GPS and BDS can achieve a precision of millimetres, but GPS performs better than BDS. Results from the combined processing of GPS and BDS demonstrate that the integration of GPS and BDS can significantly improve the precision, compared with the GPS-only and BDS-only results.

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“…Chinese BeiDou navigation satellite system (BDS) has already been providing services for the Asia-Pacific region. At present, only the BDS B3 signal (1268.52 ± 10.23 MHz) is modulated with the precision ranging code (P code) [9]. Therefore, it is desirable to develop and design compact multi-element antenna arrays for BDS B3 adaptive antenna applications.…”

Section: Introductionmentioning

confidence: 99%

Compact Four-Element Antenna Array Design for Beidou Navigation Satellite System Applications

Li¹,

Shi²,

Jian-ying³

et al. 2015

PIER Letters

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Abstract-In this letter, a compact four-element microstrip patch antenna array for BeiDou navigation satellite system (BDS) operation at the B3 (1268 MHz) band is proposed. High permittivity dielectric substrate and slit-loaded microstrip patch are used to reduce the antenna element size down to 40 mm × 40 mm which implies an aperture size of only λ 0 /6 × λ 0 /6 at the B3 band. The right-handed circularly polarized (RHCP) radiation is achieved by connecting two coaxial probes to a 0 • -90 • stripline hybrid. Four identical antenna elements are distributed with the same polarity and an inter-element separation of 80 mm (λ 0 /3 at the B3 band). The overall size of the antenna array, including the stripline feeding network and supporting ground plane, is only 140 mm × 140 mm × 5.5 mm. A prototype was fabricated and measured to verify the design concept. Simulated and measured results will be presented and discussed, showing that the proposed BDS antenna array is suitable for BDS applications.

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Compass-M1 Broadcast Codes in E2, E5b, and E6 Frequency Bands

Cited by 38 publications

References 4 publications

Characterization of Compass M-1 signals

Characterization of Compass M-1 signals

Accuracy analysis of GPS/BDS relative positioning using zero-baseline measurements

Compact Four-Element Antenna Array Design for Beidou Navigation Satellite System Applications

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