作者: aggrieve 時(shí)間: 2025-3-22 00:03
A Research of GNSS RF Interference Assessment Method interference, a improved RFI evaluation method was proposed. Meanwhile, some important models in evaluation method were analyzed by simulation, and some useful results were got. The achievement by this paper would guide the frequency coordination negotiation between Compass and other GNSSs.作者: 老巫婆 時(shí)間: 2025-3-22 00:57
ACED Multiplexing and Its Application on BeiDou B2 Band the total transmitted power fixed, different services in each sideband can have different power distribution, thus more power can be allocated on pilot channels to improve the tracking performance. The results are practical and provide a more internationally competitive solution for BeiDou navigation satellite system B2 signal.作者: Amenable 時(shí)間: 2025-3-22 06:20 作者: 冷漠 時(shí)間: 2025-3-22 11:25
Application and Development of High Power Passive Device in Satellite Systemultipaction-free, low passive intermodulation (PIM), small size and weight are required. Typical high power passive devices are presented in this paper. Based on navigation application, the tendency of such devices is discussed.作者: 接觸 時(shí)間: 2025-3-22 12:58
Analysis for Cross Correlation in Multiplexingt, the effect could be neglected to signals quadrature. Simulation and real data test is given in the end to support the conclusion, which could guide the selection of multiplex technique and spreading code of Compass.作者: 接觸 時(shí)間: 2025-3-22 18:48 作者: Ostrich 時(shí)間: 2025-3-23 00:45
Ionospheric Spatial Correlation Analysis for China Area is not a constant as well. These models are different from that of WAAS or EGNOS, which covers the middle latitude area. These China area ionosphere specific characteristics should be taken into account for the regional augmentation system development.作者: 黑豹 時(shí)間: 2025-3-23 01:43
Study on Pseudolite System for BeiDou Based on Dynamic and Independent Aircrafts ConfigurationGDOP is less than 3.5 and position precision of the pseudolite is 1.2?m in the users’ area. The pseudolite system is able to provide moderate navigation service, when BeiDou position system is unavailable to users.作者: FEIGN 時(shí)間: 2025-3-23 05:38 作者: ABHOR 時(shí)間: 2025-3-23 13:07
Mario Molaschi,Elisa Martinelli the total transmitted power fixed, different services in each sideband can have different power distribution, thus more power can be allocated on pilot channels to improve the tracking performance. The results are practical and provide a more internationally competitive solution for BeiDou navigation satellite system B2 signal.作者: 有其法作用 時(shí)間: 2025-3-23 13:59 作者: 痛得哭了 時(shí)間: 2025-3-23 18:22 作者: Admonish 時(shí)間: 2025-3-24 00:56 作者: 脾氣暴躁的人 時(shí)間: 2025-3-24 06:19 作者: Tempor 時(shí)間: 2025-3-24 09:17
J. P. Lynch III,E. A. Kazerooni is not a constant as well. These models are different from that of WAAS or EGNOS, which covers the middle latitude area. These China area ionosphere specific characteristics should be taken into account for the regional augmentation system development.作者: expansive 時(shí)間: 2025-3-24 14:38 作者: yohimbine 時(shí)間: 2025-3-24 15:24
Conference proceedings 2013 in GNSS techniques and applications..SUN Jiadong. is the Chief Designer of the Compass/BeiDou system, and the Academician of Chinese Academy of Sciences (CAS); .JIAO Wenhai. is a researcher at China Satellite Navigation Office; .WU Haitao. is a professor at Navigation Headquarters, CAS; .SHI Chuang. is a professor at Wuhan University..作者: 平常 時(shí)間: 2025-3-24 22:43 作者: gonioscopy 時(shí)間: 2025-3-25 00:44
Minimum of GDOP of Satellite Navigation and Its Applications in ISL Establishment of Walker-δ Constek establishment in Walker-δ constellation which is proposed by the authors. The optimal structure diagram of inter-satellite link is given in terms of GDOP. Finally, computations indicate the effective and useful of this new theory of the minimum of GDOP.作者: 淘氣 時(shí)間: 2025-3-25 03:19
Mario Molaschi,Elisa Martinelli protocol as a reference, parity-check part is double diagonal, which makes the encoding process possible directly with parity-check matrix. Simulation results show this LDPS code performs slightly better than what GPS L1C uses, lower encoding and decoding complexity makes it more suitable for GNSS.作者: 生氣地 時(shí)間: 2025-3-25 11:10 作者: Fabric 時(shí)間: 2025-3-25 14:22 作者: Supplement 時(shí)間: 2025-3-25 18:30 作者: avulsion 時(shí)間: 2025-3-25 21:13
A Quasi-Cyclic LDPC Code for GNSS Signal protocol as a reference, parity-check part is double diagonal, which makes the encoding process possible directly with parity-check matrix. Simulation results show this LDPS code performs slightly better than what GPS L1C uses, lower encoding and decoding complexity makes it more suitable for GNSS.作者: murmur 時(shí)間: 2025-3-26 03:40 作者: Narrative 時(shí)間: 2025-3-26 05:42 作者: 搖晃 時(shí)間: 2025-3-26 12:18 作者: florid 時(shí)間: 2025-3-26 13:53 作者: Etching 時(shí)間: 2025-3-26 20:13
Jiadong Sun,Wenhai Jiao,Chuang ShiCollections of CSNC2013 papers.Achievements and progress of China BeiDou system.Latest studies of Global Navigation Satellite System in China.Hot topics in Global Navigation Satellite System.Includes 作者: 無目標(biāo) 時(shí)間: 2025-3-26 23:42 作者: DOLT 時(shí)間: 2025-3-27 04:25
China Satellite Navigation Conference (CSNC) 2013 Proceedings978-3-642-37404-3Series ISSN 1876-1100 Series E-ISSN 1876-1119 作者: Mystic 時(shí)間: 2025-3-27 05:35 作者: 傳授知識(shí) 時(shí)間: 2025-3-27 10:01
978-3-642-44292-6Springer-Verlag Berlin Heidelberg 2013作者: 防水 時(shí)間: 2025-3-27 16:32 作者: CORD 時(shí)間: 2025-3-27 18:08
Mario Molaschi,Elisa Martinelli irregularity of the parity-check matrix, though owning superb error-control performance. This paper proposed a constructing algorithm for Quasi-Cyclic LDPC code which is suitable for GNSS signal, it avoids the existence of short cycle with the length of 4 in the Tanner graph from the beginning, by 作者: synovitis 時(shí)間: 2025-3-27 23:14 作者: 難解 時(shí)間: 2025-3-28 03:12 作者: 煤渣 時(shí)間: 2025-3-28 09:05 作者: Ointment 時(shí)間: 2025-3-28 13:10 作者: 不能強(qiáng)迫我 時(shí)間: 2025-3-28 18:00
Third Ventricle and Suprasellar Cisternsilitary applications. The GPS system, GLONASS system and Beidou system are all enhancing their anti-jamming capability by increasing more output power. Besides power amplifier and antenna, the power enhancing technology also calls for new demand to passive devices. High power capability, low loss, m作者: 自傳 時(shí)間: 2025-3-28 22:00
Third Ventricle and Suprasellar Cisternson the same carrier could be multiplexed into a constant-envelope signal with these techniques. Increasing of signals would deteriorate the crossing correlation and its impact on receiving is analyzed. It is shown that cross correlation between signals in-phase has considerable influence; in contras作者: GRIPE 時(shí)間: 2025-3-29 00:07
https://doi.org/10.1007/978-3-642-66273-7w of the selection of PN codes for lower and upper sideband signals’ pilot components, there are two schemes to achieve TD-AltBOC, namely to choose different PN codes or the same PN code. For considering the cost and complexity of receivers, only the lower sideband signal may be received for mass ma作者: 和平 時(shí)間: 2025-3-29 03:26 作者: Entrancing 時(shí)間: 2025-3-29 08:32
Clinical History and Physical Examinationof protostars and the initial stages of star formation. The observation of the radio signal is very sensitive to the interference environment present in the band since the investigated signal is received with a very low power. In this paper, according to the International Telecommunications Union re作者: 多產(chǎn)魚 時(shí)間: 2025-3-29 13:54 作者: 用手捏 時(shí)間: 2025-3-29 18:25
Chronic Obstructive Pulmonary Disease in the domestic and foreign literatures of deriving the minimum of GDOP. The existing theories of minimum of GDOP are all based on the observations of ground stations, and the deduced GDOP minimum value cannot be reached because the observable range of the receiver do not be considered. Then, the m作者: Paradox 時(shí)間: 2025-3-29 20:48
J. P. Lynch III,E. A. Kazeroonit. 0th and 1st order ionospheric correlation function was established for China area, and analyzed for various ionospheric conditions. It is shown that the ionospheric delay difference does not vary linearly with the distance, and the residual ionospheric error after the planar fitting of grid model作者: 使混合 時(shí)間: 2025-3-30 01:46
Wilfried De Backer,Jan Verhaert unmanned aerial vehicles and airships are needed to obtain the best configuration by analyzing GDOP. Then aiming at the pseudolites’ positioning, a new integrated scheme was proposed, where distance between two aircrafts is utilized to improve the positioning accuracy. Simulation results show that 作者: Gene408 時(shí)間: 2025-3-30 05:09
Yves Sibille,William W. Merrill35. Tracking all available satellites simultaneously leads to unacceptable computation burden for standalone receivers. Most satellite selection methods were therefore proposed to release the computation load with the minimum satellites set to maintain endurable positioning accuracy under the least 作者: 常到 時(shí)間: 2025-3-30 08:29
Wilfried De Backer,Jan Verhaertty risk of signal in space. Firstly, the original data should be preprocessed to calculate measured signal-in-space error. Secondly, the regularity of the errors is estimated by the spectrogram, followed by fitting orbit error with the least squares method based on Fourier series and AR model and fi作者: 薄荷醇 時(shí)間: 2025-3-30 15:06
https://doi.org/10.1007/978-3-642-66273-7ingle sideband of TD-AltBOC modulation Signal. Simulation results show that the selection of PN codes for data component may cause correlation function asymmetry. In order to reduce the effect on single sideband reception and reach the same performance with AltBOC(15,10), the selection of PN codes h作者: Morose 時(shí)間: 2025-3-30 18:27 作者: affect 時(shí)間: 2025-3-30 22:33 作者: Synchronism 時(shí)間: 2025-3-31 02:53
Wilfried De Backer,Jan Verhaertng to statistics the according abnormal rate. The simulation results of the measured data of different type in-orbit satellite which is from 2002 to 2011 show that the abnormal rate of signal in space is 10./h, which meet the index that three satellites may fault every year, therefore the analysis m作者: 強(qiáng)制性 時(shí)間: 2025-3-31 07:15 作者: 粗魯?shù)娜?nbsp; 時(shí)間: 2025-3-31 10:06
China Satellite Navigation Conference (CSNC) 2013 ProceedingsSatellite Navigation作者: 預(yù)測(cè) 時(shí)間: 2025-3-31 14:03 作者: 老人病學(xué) 時(shí)間: 2025-3-31 17:51
Research on GNSS Interoperability Parametersis set is defined as interoperability parameter. The interoperability parameters can be separated into signal level and message level, and should be broadcast to users in a common time reference and coordinate reference frame. Then, we discussed the definition, detection and calculation method of ea作者: 罵人有污點(diǎn) 時(shí)間: 2025-3-31 21:59
GNSS Satellite Selection Algorithm Revisited: A Weighted Way with Integrity Considerationn. Giving the fact that the loss of some satellite may have little difference on the DOP, but could impose a negative influence on the integrity performance, satellite selection should therefore give an insight into the selection criterion and the determination of the threshold values. A novel satel作者: HALO 時(shí)間: 2025-4-1 02:35 作者: wall-stress 時(shí)間: 2025-4-1 09:47
