 |
|
| Instructors |
Dr. Thomas Burger, ESA/ESTEC
Dr.
Martin Hollreiser, ESA/ESTEC
Dr. John Betz, The
MITRE Corporation |
Objectives |
• To present current
information on the status, plans, schedule and capabilities for GPS and
Galileo, as well as for other satellite-based systems with position
determination applications.
• To provide a structured view of current and future GNSS signals and to
evaluate the signal processing performance of receivers.
• To describe techniques for the receiver processing of current and
future GNSS signals, showing features, capabilities, trade-offs and
limitations.systems with position determination applications.
• To assist the attendee in developing skills for assessing receiver
processing methods and performance for both current and future GNSS
signals and systems. |
| Prerequisites |
Familiarity with engineering terms and analysis techniques. General
familiarity with matrix operations is desirable for Thursday and Friday,
and familiarity with signal processing techniques is desirable for
Wednesday through Friday. |
Who
Should
Attend? |
This
course is intended for scientists and engineers seeking to develop
expertise in the characteristics, features and processing of current and
planned signals from GPS and other GNSS systems. The course will
substantially benefit both those who need to understand the details and
rationale of advanced signal receiver processing and those who need to
produce quantitative assessments of receivers and their signal
processing performance. |
|
Course Schedule |
DAY 1 - Course 359A
Dr.
Thomas Burger & Dr. Martin Hollreiser, ESA/ESTEC |
|
9:00 – Galileo Signal In Space (SIS)
Definition
Frequency plan, signal baseline overview
Pre-requisites: modulations; codes
Galileo Signal Choices I
E1, CBOC for SoL
10:15 - Galileo Signal Choices II
E6, commercial channel
E5, AltBOC
Navigation Message
Types, uses, cases
Structures
Conclusion
11:30 - Galileo Receiver Design and Performance
Overview Galileo TUS & GRC main features and drivers
Receiver Signal Processing
Antenna
RF/IF front end: architecture trade-offs;
sub-sampling/BandPass sampling;
RF-building blocks; ADC
12:30 - Lunch
on your own
2:00 - Receiver Signal Processing II
Digital baseband processing
Acquisition & trade-offs: architectures (serial, parallel, code
matched filter + FFT); detectors (single trial, Tong); BOC acquisition
specifics (SSB, DSB, BOC, bump jumping); trade-off summary
Final steps in acquisition
TTFF, TTP, tracking
DLL: loop, discriminators, S-curve, Loop filter, NCO, performance
3:15 - Receiver Signal Processing III
Narrow correlator (BW vs correlator spacing); carrier aiding; carrier
smoothing; loss of lock; pseudo range
FLL: loop, discriminators, S-curve, performance; loss of lock
PLL/Costas: loop, discriminators, S-curve, performance; loss of lock;
loop order Interference
Multipath
Iono scintillation
4:30 - Receiver Navigation & Integrity Processing
Measurement preprocessing
PVT
Integrity
Analysis SubSystem
GETR lab & GIOVE-A/-B first results
5:30
- Day 1 and Course 359A end |
|
DAY 2 - Course 359B
Dr. John
Betz, MITRE |
|
9:00 – Overview of GNSS & GNSS
Signals
Overview of GNSS fundamentals
Characteristics of GNSS signals
10:15 - GNSS Signals I: Tools for Representing and Analyzing
Signals,
Direct Sequence Spread Spectrum & GNSS Spreading Modulations
Mathematics of signal representation, analysis, correlation processing,
and power spectral densities
GNSS spreading modulations, including BPSK-R and BOC with sine phasing
and cosine phasing
Signal multiplexing
11:30 - GNSS Signals II: Structure of GNSS Signals
Pilot and data components
Data message channel encoding, interleaving, and modulation
Summary and discussion of Day 1 Morning
Review questions for Day 1 Morning
12:30 - Lunch
on your own
2:00 – Present and Future Global Navigation Satellite Systems
Global Positioning System (GPS)
GPS Satellite Based Augmentation Systems (SBAS)
Global Orbiting Navigation Satellite System (GLONASS) of the Russian
Federation
GALILEO European Navigation Satellite System
Quazi-Zenith Satellite System (QZSS) of Japan
Indian Regional Navigation Satellite System (IRNSS)
COMPASS: China’s Navigation Satellite System
3:15 - GNSS System Engineering I:
Link Budgets and Effective C/N0
Link budgets for different GNSS configurations
Effective carrier power to noise density (C/N0) considerations
4:30 - GNSS System Engineering II:
Error Budgets
Space segment
Control segment
Receiver segment
Propagation effects
Summary and discussion of Day 1 Afternoon
Review questions for Day 1 Afternoon
5:30
- Day 2 ends
|
DAY 3
Dr. Betz |
|
9:00 - Review of Day 1
Day 1 Review Questions and Answers
Day 1 Discussion
10:15 - GPS Signals: Part 1
Coarse/Acquisition (C/A)-code signal
Precision/encrypted (P/Y)-code signal
L2C signal
11:30 - GPS Signals: Part 2
Military (M)-code signals
L5 signals
L1C signals
Summary of GPS signals
GPS SBAS signals
Summary and discussion of Day 2 Morning
Review questions for Day 2 Morning
12:30 - Lunch on your own
2:00 - GLONASS Signals
GLONASS Standard Accuracy signals
GLONASS High Accuracy signals
Summary of GLONASS signals
3:15 - Galileo Signals: Part 1
Overview of planned GALILEO services
L1 Open signals
L1 Public regulated service signals
E6 commercial service signals
4:30 - Galileo Signals: Part 2
E6 Public Regulated Service signals
E5 signals
Summary of GALILEO Signal Characteristics
Summary and discussion of Day 2 Afternoon
Review questions for Day 2 Afternoon
5:30 - Day 3 ends
|
DAY 4
Dr. Betz |
|
9:00 - Review of Day 2
Day 2 questions and answers
Day 2 discussion
QZSS Signals
L1 signals
E6 signals
L5 signals
Summary of QZSS signals
10:15 - Receiver Processing Overview
Receiver processing introduction
Receiver front-end considerations [antennas, radio frequency (RF),
intermediate frequency (IF), and bandlimiting, sampling and quantization
(BSQ)]
Receiver front end processing losses due to BSQ
Challenges and trends
11:30 - Initial Synchronization Processing
Signal acquisition overview
Initial receiver states for acquisition
Initial synchronization processing for different spreading modulations
Signal acquisition performance prediction
Summary & discussion of Day 3 Mor.
Review questions for Day 3 Morning
12:30 - Lunch on your own
2:00 - Signal Tracking and Loop Filters
Signal tracking overview
Digital loop filter design and performance
3:15 - Code Tracking
RMS bandwidth
Code tracking discriminators and
S-curves for different modulations
Code tracking accuracy
Code tracking loss of lock
4:30 - Carrier Tracking
Frequency-locked loops
Costas loops
Phase-locked loops
Carrier tracking accuracy
Carrier tracking loss of lock
Summary and discussion of Day 3 Afternoon
Review questions for Day 3 Afternoon
5:30 - Day 4 ends
|
DAY 5
Dr. Betz |
|
9:00 – Review of Day 3
Day 3 questions and answers
Day 3 discussion
10:15 - Data Demodulation and PVT Calculation
Data demodulation and decoding
De-interleaving
Position, Velocity, Time (PVT) calculation
Summary of receiver processing
11:30 - Recovering and Using Signal Components
Time-multiplexed pilot and data components
Phase-multiplexed pilot and data components
Galileo E1 signal
Galileo E5 signal
12:30 - Lunch on your own
2:00 – Case Study: Receiver Processing of Galileo E1 OS and GPS L1C
Signals
Initial synchronization processing
Code tracking
Carrier tracking
Data message processing
3:15 - Interference and Multipath
Interference characteristics
Interference effects on receiver front ends
Interference effects on signal acquisition, carrier tracking, data
demodulation
Interference effects on code tracking for different modulations
Multipath characteristics
Multipath effects on code tracking for different modulations
Multipath effects on carrier tracking
System-level mitigations of multipath
Introduction to multipath mitigation processing: narrow correlators,
double-delta processing
4:30 - Advanced Processing Techniques
Estimating carrier power to noise spectral density; C/N0
Estimating interference power to signal power levels; I/S
Data wipeoff
Vector processing
Coherent multi-signal processing
Block processing
Review and Discussion
Brief review of course. Discussion of GNSS technology directions,
concerns and needs.
5:30 -
Course
359B and 359 end |
Materials
You Will Keep |
• A
notebook including all materials presented during the course.
• NavtechGPS's CD-ROM containing a variety of GPS/GNSS references.
Course
359A or 359:
•
A
copy of the following text:
Galileo: Europe's Guiding Star, Faircount Ltd., 2005. |
Continuing
Education
Units |
Course
359: 3.0
(30 hours)
Course
359A: 0.6 (6 hours)
Course
359B: 2.4
(24 hours)
|
|
