China Satellite Navigation Conference (CSNC 2024) Proceedings

Name: China Satellite Navigation Conference (CSNC 2024) Proceedings | Volume II
Brand: Springer
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Volume II

Changfeng Yang Jun Xie(Editor)

Springer (Publisher)

1st Edition

Published on 6. November 2023

XIX, 617 pages

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978-981-99-6932-6 (ISBN)

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Content

Intro
Editorial Board
Preface
Contents
GNSS and Their Augmentations
A Study on SBAS-RTK Integrated Positioning Technologies
1 Introduction
2 RTK Service Risk Analysis
2.1 RTK Fault Factor
2.2 Performance Impact Analysis
3 SBAS-RTK Integrated Positioning
3.1 SBAS Positioning
3.2 Data Detection
3.3 Weighted RTK Positioning
3.4 Data Check
4 Test and Verification
5 Summary
References
Research on the TESLA Authentication Algorithm for BDSBAS
1 Introduction
2 Principles of SBAS Message Authentication
2.1 Authentication Principle
2.2 SBAS Authentication Structure
3 BDSBAS Message Authentication Design
3.1 Chinese Commercial Cryptography Standard Algorithm
3.2 Design of the TESLA Authentication Protocol Based on the Chinese Commercial Cryptography Algorithm
3.3 SBAS User
3.4 Message Design
3.5 BigMAC
3.6 LittleMAC
4 Simulation Experiment
4.1 Key Performance Indicators
4.2 Simulation Analysis
5 Conclusion
References
Single Satellite Positioning Method and Error Characteristic Analysis of LEO Navigation Satellites
1 Introduction
2 Single Satellite Pseudo-Range and Doppler Positioning Principle and Error Modeling
2.1 Measurement Model
2.2 LSM Positioning Algorithm Utilizing Pseudo-Range and Doppler
2.3 CRLB of Positioning Error
2.4 Error Ellipsoid of Positioning Error
3 Simulation and Verification
3.1 Simulation Conditions
3.2 Simulation Results
4 Conclusion
References
A High Dynamic Positioning Algorithm for Ka Band LEO Satellites in Beam Polling Mode
1 Introduction
2 Pseudo range And Doppler Positioning Equation
3 Low Orbit Ka Band Signal Positioning Mode
3.1 Polling Mode
3.2 Problems in Low Earth Orbit Ka Band Satellite Positioning
4 Integrated Navigation Positioning Algorithm
4.1 Tightly Coupled Mode
4.2 Principle of Accumulated Error Estimation and Correction
5 The Design of Kalman Filter
5.1 State Variables
5.2 State Transition Matrix
5.3 Accumulated Variables
5.4 Observation Calculation
5.5 Measurement Matrix
5.6 Q Matrix and R Matrix
5.7 Setting of Initial Value of State Variables and Initial P Matrix
6 Simulation and Result Analysis
6.1 Simulation Parameter Setting
6.2 Simulation Result
7 Conclusion
References
Spoofing Monitoring Method Research of GNSS Based on LEO Doppler Measurement
1 Introduction
2 Spoofing Monitoring Algorithm Based on Doppler
2.1 Spoofing Interference Scenario
2.2 Default Detection Algorithm
2.3 Recognition Algorithm of Spoofing
3 Simulation and Result Analysis
3.1 Simulation Parameter and Index Setting
3.2 Simulation Result
3.3 Analysis of Simulation Results
4 Conclusion
References
Credibility Monitoring Research of BDS Based on LEO/INS
1 Introduction
2 Credibility Monitoring Algorithm
2.1 Kalman Filter Algorithm
2.2 Integrated Navigation System Design
2.3 Fault Detection Algorithm
2.4 Fault Recognition Algorithm
3 Simulation Result Analysis
3.1 Simulation Parameter and Index Setting
3.2 Simulation Result
4 Conclusion
References
ARAIM Integrity and Continuity Considering Fault Detection and Exclusion
1 Introduction
2 Integrity and Continuity Risk
2.1 Integrity and Continuity Risk Considering FD
2.2 The Need Analysis of Fault Exclusion for Dual-Constellation GPS/BDS
2.3 Integrity and Continuity Risk Considering FDE
3 Integrity and Continuity Risk Bounds for FDE
3.1 Integrity Risk Evaluation
3.2 Continuity Risk Allocation
4 Performance Evaluation
4.1 Simulation Conditions Setting
4.2 Parameter Determination
4.3 Availability Analysis
5 Conclusion
References
A Coupled RTK/INS Positioning Method Based on Robust Estimation
1 Introduction
2 The Basic Theory of Robust RTK
2.1 Mathematical Model of RTK
3 Robust Kalman Filtering Algorithm
3.1 Mathematical Model of RTK/INS Coupled Navigation
3.2 Robust Kalman Filter Based on Innovation
4 Analysis of Experimental Results
4.1 Experimental Environment
4.2 Analysis of Experimental Results
4.3 Comparison of Classical Kalman and Robust Kalman Filter
5 Conclusion
References
Optimal Allocation Method of Integrity Risk Indicator for Multiple Risk Sources in PPP-RTK
1 Introduction
2 The Principle of Integrity Risk Index Optimal Allocation Method
3 Integrity Risk Index Optimization Allocation Steps
3.1 Failure Mode Settings
3.2 Construction of Protection Level
3.3 Allocation Model Construction
4 Simulation Experiment
4.1 Sensitivity Analysis of ISM Parameters
4.2 Global Simulation of Optimal Distribution of Integrity Risk Indicators
5 Summary
References
Reliability and Backup Strategy Analysis of Low-Earth Orbit Navigation Constellation
1 Introduction
2 Constellation Configuration and Reliability Requirements
2.1 Constellation Configuration Design
2.2 Constellation Launch Program
2.3 Constellation System Reliability Requirements
2.4 Single Satellite Reliability Design and Principle of Network Supplement
3 Satellite Reliability Model and Constellation Reliability Calculation Method
3.1 Satellite Reliability Model [3]
3.2 Reliability Calculation Method of Constellation System
4 Constellation Network Supplement and Reliability Analysis in Operation Phase
4.1 Analysis of Constellation Backup Criterion
4.2 Strategy of Network Supplement and Reliability Analysis
4.3 5-Year Lifetime Satellite
4.4 8-Year Lifetime Satellite
4.5 Backup Mode Optimization
5 Summary
References
An Asynchronous Observation Positioning Algorithm Based on Factor Graph Optimization
1 Introduction
2 Model of Asynchronous Observation System
3 Basic Principle and Algorithm Flow the FGO Method
3.1 Fundamental Principle
3.2 Algorithm Flow
4 Simulation
4.1 Simulation Parameters
4.2 Simulation Result
5 Conclusion
References
Evaluation and Analysis of Uplink Signal Interference in GEO Satellite System
1 Introduction
2 Analysis of Uplink Interference in GEO Satellite System
2.1 Uplink Calculation Model
2.2 Performance Analysis of Transparent Transponder Under Interference Conditions
2.3 Downlink Calculation Model
3 Signal Interference Calculation Method Based on Spectral Separation Coefficient
3.1 Single-Signal Interference Calculation Method
3.2 Multi-signal Interference Calculation Method
4 Analysis of the Influence of Uplink Interference on the Carrier-to-Noise Ratio
4.1 Influence of Interference Signal Power
4.2 Influence of the Number of Interference Stations
4.3 The Effect of Interference Station Deployment Location
5 Conclusion
References
Impact of Temporally Correlated Error on ARAIM ISM During Ionospheric Storm Period
1 Introduction
2 Ionospheric Delay Error Under Stormy Conditions
3 The Conservative Representation of Gauss Markov Process
4 Measurement Error Caused by Ionospheric Storm
4.1 Ionosphere Error in Ionosphere-Free Combination Measurement Under Stormy Conditions
4.2 Ionospheric Error in Carrier Smoothed Code During Storm Period
5 Simulation
5.1 Measurement Error Caused by the Second-Order Ionospheric Term
5.2 Global simulation of ARAIM
6 Conclusions
7 Appendix
References
Scintillation Identification Based on Spectral Features
1 Introduction
2 Scintillation Spectrum Features
3 Scintillation Detection with Different Spectrum Features
3.1 Scintillation Data Process and Labeling
3.2 Training and Test of ML Models
3.3 Identification Accuracy
3.4 Result of Scintillation Identifications
4 Deeper Analysis
5 Conclusion
References
Centimeter-Level Real-Time Orbit Determination and Accuracy Analysis of LEO Satellite with POD4LEO Software
1 Introduction
2 GNSS Real-Time Products
2.1 Recovery Method
2.2 Orbit Accuracy
2.3 Clock Error Accuracy
3 Mathematical Model
3.1 Observation Model
3.2 Dynamics Model
3.3 Estimation Method
4 Test and Results
4.1 Processing Strategy
4.2 Results
4.3 SISRE (Orbit)
5 Summary
References
Impact Analysis of BeiDou Satellite Integrity Events in 2022
1 Introduction
2 Integrity Performance Assessment Methods and Description of Abnormal Event Phenomena
2.1 Integrity Performance Assessment Methods
2.2 Integrity Performance Assessment Methods
3 The Impact of Abnormal Event
3.1 Comparison of Accuracy Assessment Result and Impact Analysis of the Event in the First Quarter of 2022 and 2021
3.2 Comparison of Continuity Assessment Result and Impact Analysis of the Event in the First Quarter of 2022 and 2021
3.3 Comparison of Continuity Assessment Result and Impact Analysis of the Event in the First Quarter of 2022 and 2021
4 RAIM Fault Detection and Exclusion
5 Conclusion
References
Analysis of Navigation Augmentation Performance Based on LEO Satellite Communication Constellation
1 Introduction
2 An Architecture of Navigation Augmentation System Based on LEO Communication Constellation
2.1 Overall System Architecture
2.2 Spatial-Temporal Reference
2.3 Constellation and Frequency
3 Analysis of Navigation Augmentation Performance Based on LEO Communication Constellation
3.1 Improving Reception Sensitivity of BDS/GNSS Terminal Based on Communication-Aided Channel
3.2 Positioning Performance Based on LEO Narrow-band Communication Signal
3.3 Positioning Performance Based on LEO Wide-band Communication Signal
4 Conclusion
References
Research on BDSBAS Service Coverage Area Assessment Methodology
1 Introduction
2 Research on WAAS Service Coverage Area Assessment Method
2.1 Research on WAAS Service Area Availability
2.2 BDSBAS Service Coverage Area Assessment Using Grid Point Evaluation Method
3 BDSBAS Service Coverage Area Assessment
3.1 Data Sources
3.2 Method Flow of BDSBAS Service Coverage Area Assessment
3.3 BDSBAS Location Service Coverage Area Assessment
3.4 BDSBAS Ionospheric Grids Coverage Area Assessment
4 Conclusions
References
A New Coupled Method for Pseudolite System-Augmented GNSS Real-Time Kinematic PPP
1 Introduction
2 Coupled Models
2.1 Tightly Coupled Model
2.2 Semi-Tightly Coupled Model
2.3 Dual-Filter Tightly Coupled Model
3 Experiments
3.1 Introduction to the Experiment
3.2 Results Analysis
4 Conclusions
References
BDS-3 Signal in Space Ranging Errors Performance and On-Orbit Status Monitoring and Evaluation Based on Historical Data from 2020 ~ 2022
1 Introduction
2 Methodology
2.1 Signal in Space Range Error Performance Evaluation
2.2 Observation-Based Outage Detection of Satellite Signal in Space
2.3 Analysis Method of BeiDou Satellite On-Orbit Operation Status
3 Performance Evaluation and On-Orbit Operational Status Analysis of BDS-3 Satellites
3.1 BDS-3 Broadcast Orbit and Clock Error Evaluation
3.2 BDS-3 Signal in Space Range Error Evaluation
3.3 Analysis of the On-Orbit Operational Status of the BDS-3 Satellites
3.4 BDS-3 Satellite Signal in Space Unplanned Outages on Orbit
4 Conclusions
References
Epoch Completeness Rate Analysis of BDS-3 PPP-B2b Augmentation Messages
1 Instruction
2 PPP-B2b Augmentation Message
3 Result and Analysis
3.1 Satellite Mask
3.2 Orbit Correction
3.3 DCB Correction
3.4 Clock Correction
4 Conclusion
References
GNSS Global PPP System Technology: Bottleneck and Development Direction
1 Introduction
2 Current Technology Status and Bottlenecks of GNSS Global PPP Positioning Systems
2.1 Current Status of GNSS Space-Time Reference Establishment, Maintenance and Synchronization System Architecture
2.2 Current Status of GNSS Civil Space Signal System
2.3 Current Status of GNSS Civil Message Structure
3 Future Development Direction of Next-Generation GNSS Global PPP System Technology
3.1 Instantaneous Dm-Level Standard Point Positioning Based on Code Pseudorange
3.2 Next-Generation GNSS Space "Net" Ground "Net" Space-Time Reference System Architecture
3.3 Next-Generation GNSS Unambiguous Instantaneous Cm-Level Space Meta-Signal
3.4 High Power Fast Message Signal in New Frequency Bands Such as UHF/VHF
4 Conclusion
References
GNSS Signal Technologies
Polarization-Spatial Joint Anti-jamming Algorithm for GNSS Receiver in High Dynamic Environment
1 Introduction
2 Signal Model
3 Algorithm Description
3.1 Polarization Covariance Matrix Reconstruction of Array
3.2 Null Widening Method
3.3 Solving Weight Vector Based on Conjugate Gradient Method
4 Simulation
5 Conclusion
References
MCSK Signal for LEO Satellite Constellation Based Navigation Augmentation System
1 Introduction
2 Augmentation Signal Requirements for LEO Navigation
2.1 High Precision Measurement Requirements
2.2 High Data Rate Requirements
3 Low Orbit Navigation Augmentation MCSK Signal
3.1 MCSK Signal Design Motivation
3.2 MCSK Signal Definition
4 MCSK Signal Receiving Method
5 Performance Analysis
5.1 Demodulation Performance
5.2 Tracking Performance
6 Conclusions
References
The Interference Analysis and Evaluation of DME to BeiDou-3/B2a
1 Introduction
2 DME Introduction
3 DME to B2a Interference Analysis Algorithm Model
3.1 Impulse Interference Suppression Method for Aviation GNSS Receivers
3.2 DME to BeiDou-3/B2a Interference Evaluation Ideas
3.3 Analysis of the Effective Carrier-to-Noise Ratio Degradation from DME to BeiDou/B2a
4 Evaluation of DME to BeiDou-3/B2a Signal in China
4.1 Evaluation Area
4.2 Blanking Threshold Setting
4.3 BeiDou Receiver Receiving DME Signal Power Budget
4.4 Effective Carrier-to-Noise Ratio Degradation Analysis
5 Conclusion
References
Spreading Code Authentication Technique Based on CSK Modulation
1 Introduction
2 CSK Modulation and Demodulation
2.1 CSK Modulation Principle
2.2 CSK Demodulation Method
3 CSK Modulation-Based SCA Scheme
3.1 Signal Model
3.2 Receiver Certification Process
3.3 Authentication Process
4 Experiment Simulation
4.1 Detection Probability
4.2 Carrier-to-Noise Degradation
4.3 Authentication Efficiency
5 Conclusion
References
Anti-Multipath Localization Method Based on MEDLL and WLS
1 Introduction
2 Multipath Detection Method Based on MEDLL
2.1 Realization of Multipath Detection Method Based on MEDLL
2.2 Correlation Between Different Multipath Detection Indexes and Pseudo-Distance Multipath Errors
3 WLS Localization Algorithm Based on Multipath Detection
3.1 Determine the Weights of Different Multipath Detection Indexes
3.2 Fuzzy Comprehensive Multipath Evaluation Index
3.3 Location Algorithm Based on WLS
4 Experiment and Results
5 Summary
References
A Design of Navigation Enhancement Signal Based on Communication Satellite Signal
1 Introduction
2 Generation Method of Navigation Enhancement Signal
2.1 Communication Signal System
2.2 Generation Method of Navigation Enhancement Signal
3 Receiving and Processing of Navigation Enhancement Signal
4 Performance Evaluation of Navigation Enhancement Signal
4.1 Receiving Carrier Noise Ratio
4.2 Acquisition Sensitivity
4.3 Pseudorange Measurement Accuracy
4.4 Frequency Measurement Accuracy
5 Acquisition and Ranging Performance Evaluation of Actual Signal for Navigation Enhancement
5.1 Acquisition and Data Processing of Actual Signal
5.2 Pseudorange Measurement Accuracy
5.3 Doppler Estimation Accuracy
6 Conclusion
References
HsPWM Satellite Navigation Signal Generation and Analysis
1 Introduction
2 Signal Analysis and Method Proposal
2.1 Baseband Signal Definition and Generation
2.2 Carrier Signal Generation and Modulation
3 Generation Method of Navigation Signal
4 Conclusion
References
A Fast Configuration Optimization Algorithm for GNSS-based InBSAR System
1 Introduction
2 GNSS-Based InBSAR Configuration Optimization Model
3 Fast Configuration Optimization Algorithm
3.1 Satellite Trajectory Fitting
3.2 Resolution and Elevation Angle Optimization
3.3 Theoretical Deformation Retrieval Accuracy
4 Experimental Results and Analysis
4.1 Experimental Scene Introduction
4.2 Configuration Optimization Results
5 Conclusion
References
GNSS Carrier Tracking via a Variational Bayesian Adaptive Kalman Filter for High Dynamic Conditions
1 Introduction
2 Signal Model
3 Proposed Technique
3.1 System Model
3.2 Proposed AKF
4 Simulation Results
4.1 Validity of the Proposed System Model
4.2 Performance of the Proposed Filter
5 Conclusion
References
BOC Signal Spoofing Detection Based on Multi-correlator Signal Quality Monitoring Method
1 Introduction
2 Signal Model
3 The Spoofing Detection Algorithm
3.1 Multi-correlator SQM Detection Metrics
3.2 Statistical Properties of the Metrics
3.3 Detection Threshold Analysis
4 Merit-Based Selection and Combination of Metrics
4.1 Spoof Generation Experimental Scenario
4.2 The Theoretical Basis of Merit-Based Selection and Combination
4.3 Merit-Based Selection of Metrics
4.4 Combination of Metrics
5 Conclusion
References
A GNSS Spoofing Detection Method Based on CNN-DOA
1 Introduction
2 Spoofing Interference Characteristics
3 Decoherent DOA Estimation Algorithm
4 CNN-Based DOA Estimation Algorithm
4.1 Sample Generation
4.2 Network Construction
4.3 Simulation Results
5 Spoofing Interference Detection Process
5.1 Simulation Settings
5.2 CNN Performance Analysis
5.3 CNN Performance Analysis
6 Conclusion
References
Analysis of Anti-Repeater-Spoofing Performance of GNSS Nulling Anti-Jamming Receiver
1 Introduction
2 Signal Model
3 Representation of Weight Vector Under Limited Snapshots
4 The Influence of Spoofing Power on Algorithm Performance
4.1 The Influence of Spoofing Power on the Real Satellite Signal
4.2 The Influence of Spoofing Power on the Output of the Spoofing Signal
5 Simulation and Analysis
5.1 Simulation of Signal Flow
5.2 Simulation of Antenna-Array Receiver
6 Summary
References
Design and Performance Assessment of a Time-Varying Channel Simulator for High-Mobility Satellite Navigation Scenarios
1 Introduction
2 Time Varying Channel Principle of Satellite Navigation
2.1 Satellite Doppler Effect
2.2 Time Varying Channel Sampling Conditions
3 Time-Varying Channel Simulator
4 Performance Assessment
4.1 Assessment Configuration
4.2 Results
5 Conclusion
References
Research on Receiving and Processing Technology of Short-Time Burst Spread Spectrum Signal
1 Introduction
2 Received Signal Model and Signal Processing Architecture
2.1 Received Signal Model
2.2 Signal Processing Architecture
3 Signal Receiving Algorithm
3.1 Capture Algorithm
3.2 Tracking Algorithm
4 Improved Algorithm
5 Algorithm Performance Analysis and Simulation Verification
5.1 Performance Analysis of Capture Algorithm
5.2 Performance Analysis of Frequency Offset Estimation Algorithm
6 Summary
References
Identifying GNSS NLOS Using Visual Label and Ensemble Tree Under Complex City Environment
1 Introduction
2 Algorithmic Framework
3 INS and Fisheye Camera Assisted LOS/NLOS Signal Tag Generation
4 NLOS Signal Ensemble Tree Classifier Based on Visual Labels
4.1 LOS/NLOS Signal Classification Characteristics
4.2 NLOS Signal Recognition Algorithm Based on Ensemble Tree
5 Experimental Results and Analysis
5.1 Presentation of Experimental Data
5.2 NLOS Signal Recognition Performance Evaluation
5.3 Eigenvalue Importance Analysis
6 Conclusion
References
Research on the Index System of BDS-3 Signal Quality Evaluating Methods Based on High-Gain Observations
1 Introduction
2 New-Generation BDS-3 Signals
3 Signal Quality Monitoring and Assessment Index Systems
4 GNSS Signal Quality Monitoring and Assessment Methods
4.1 Signal Power
4.2 Time Domain
4.3 Frequency Domain
4.4 Modulation Domain
4.5 Correlation Domains
4.6 Measurement Domain
4.7 Repairing Capability
4.8 Polarization Mode
5 Typical Signal Quality Analysis Results of BDS-3
6 Conclusions
References
GNSS User Terminals
Study on the Influence of Antenna Arrays Anti-Jamming Algorithms on GNSS Receiver Single Point Position
1 Introduction
2 STAP Algorithms
3 Principle of Pseudo-Code Measurement Error Introduced by STAP Algorithms
4 Simulation and Experiment Results
4.1 Overview
4.2 The First Set of Simulation Data
4.3 The Second Set of Simulation Data
4.4 Single Point Position Experiment
5 Conclusions
References
Research of Precise Point Positioning Model Based on Smartphone
1 Introduction
2 Smartphone PPP Model
3 Experiments and Analysis
3.1 Experimental Data and Processing Strategy
3.2 Data Analysis
3.3 Static Test
3.4 Dynamic Test
4 Conclusion
References
A Fast Positioning Method of Navigation Receiver Assisted by Doppler Information
1 Introduction
2 Obtain Absolute Time Through Doppler
2.1 Time Estimation Method
2.2 Time Accuracy Analysis
3 Joint Location of Pseudo Range Doppler
3.1 Measurement Model of Pseudo Range
3.2 Positioning Process
4 Simulation and Test
4.1 Static Simulation
4.2 Dynamic Test
5 Conclution
References
The Group Delay Calibration of the Standard Antenna and the Group Delay Measurement of the Beidou Airborne Antenna
1 Introduction
2 The GD Calibration of the Standard Antenna
2.1 The Antenna GD Calibration Method Based on Space Scan
2.2 The Calibration Experiment
3 The GD Measurement of the Beidou Airborne Antenna
3.1 The Measurement Method
3.2 The Measurement Experiment
4 Conclusion
References
An Improved Algorithm of Unambiguous Acquisition Based on BOC Signal
1 Introduction
2 Theoretical Basis of BOC Modulation Algorithm
2.1 Basic Model of BOC Modulation
2.2 Power Spectral Density and Autocorrelation Function of BOC Signal
3 Auxiliary Signal Cooperative Ambiguity Free Acquisition Algorithm
3.1 Algorithm Model
3.2 Generation of Auxiliary Signals
3.3 Unambiguous Operation Flow
4 Simulation and Performance Test Results
4.1 Algorithm Capture Performance Detection
4.2 Analysis of Reconstruction Function Related Results
4.3 Analysis of the Anti-jamming Ability of the Algorithm
5 Conclusion
References
A Three-Layer Parallel Implementation of the DPE Receiver Based on GPU
1 Introduction
2 Signal Model and Problem Description
2.1 Signal Model
2.2 Fundamentals of DPE
3 A GPU-Based Parallel Implementation of the DPE Receiver
3.1 CPU + GPU Heterogeneous Programming
3.2 The GPU-Based Parallel DPE Joint Accumulation
4 Experimental Results and Analysis
5 Conclusion
References
GNSS Anti-sapoofing Method Based on Signal Transmission Time Density Clustering
1 Introduction
2 Density Clustering Method
2.1 Method Introduction
2.2 Density Clustering Threshold
3 Anti-spoofing Method
3.1 Method Introduction
3.2 Method Feasibility Analysis
4 Experimental Results
4.1 Signal Transmission Time Test
4.2 Ability Test for Eliminating Abnormal Signals
4.3 Anti-spoofing Ability Test
5 Conclusion
References
Research on Spoofing Detection Based on C/N0 Measurements for GNSS Array Receivers
1 Introduction
1.1 A Subsection Sample
2 Signal Model
2.1 Array Signal Model
2.2 Effective C/N0 Model
3 Spoofing Detection
3.1 C/N0 Single Difference
3.2 Spoof Detection Based on C/N0 Single Difference
4 Simulation Results
5 Conclusion
References
A Fast C/N0 Estimation Method Based on the Ratio of Acquisition Correlation Value
1 Introduction
2 Signal Model
3 Method
4 Simulation Analysis
4.1 Influence of Ny and p
4.2 Influence of Tcoh
4.3 Performance Comparison
5 Experiment Results
6 Conclusion
References
Development and Evaluation of GPS L2C Software Receiver Baseband Signal Processing Module
1 Introduction
2 Design of Baseband Signal Processing Module
3 L2C Signal Acquisition Algorithm
3.1 L2C Signal and Correlator Model
3.2 Influence of Replica Code Shape on Acquisition Performance
3.3 Implementation of L2C CM Acquisition Module
4 L2C Signal Tracking Algorithm
4.1 Discriminators in L2C Tracking
4.2 Implementation of L2C Tracking Module
5 Real-World Signal Test
5.1 Real-World Signal Acquisition
5.2 Real-World Signal Tracking
6 Conclusion
References
Algorithm Optimization and Terminal Validation of BDSBAS Ionospheric Correction
1 Introduction
2 Ionospheric Estimation of BDSBAS
2.1 GIVD in BDSBAS
2.2 GIVE in BDSBAS
2.3 Ionospheric Parameter Setting
2.4 BDSBAS Ionospheric Procedure
3 Discussion
4 Conclusion
References
Research on Intelligent Navigation Algorithm of Long and Short Term Memory Network Based on Firework Algorithm Optimization in Satellite Blocking Environment
1 Introduction
2 Intelligent Navigation Method of LSTM Network Based on Fireworks Algorithm Optimization
2.1 LSTM Network Model
2.2 Fireworks Algorithm Model
3 Design of Intelligent Navigation Algorithm Based on LSTM Network in Satellite Blocking Environment
3.1 LSTM Training Structure
3.2 Intelligent Navigation System Mode Based on LSTM Network
4 Simulation Results and Analysis
4.1 Simulation Design and Simulation Results
4.2 Analysis of Simulation Results
5 Conclusion
References
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China Satellite Navigation Conference (CSNC 2024) Proceedings

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