 |
|
| Instructors |
Dr. John Betz, The
MITRE Corporation |
Objectives |
- To provide a
strong foundation in the engineering of Global Navigation Satellite
System (GNSS) signals, receiver processing and system
configurations, especially for high-performance 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.
- To assist the
attendee in developing skills for assessing receiver processing
methods and performance for both current and future GNSS signals and
systems.
|
| Prerequisites |
Attendees should have familiarity with the fundamentals of GPS, such as
presented in
Course 122 or equivalent, along
with previous exposure to basic signal processing techniques and
terminology, as presented in Course
356 or equivalent. General familiarity with engineering mathematics
is desirable. |
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
Dr. John
Betz, MITRE |
|
8:30 – Overview of GNSS & GNSS
Signals
Overview of GNSS fundamentals
Characteristics of GNSS signals
9:45 - 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
11:00 - 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
12:00 - Lunch
on your own
1:30 – 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
2:45 - 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
4:00 - 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 1 ends
|
DAY 2
Dr. Betz |
|
8:30 - Review of Day 1
Day 1 Review Questions and Answers
Day 1 Discussion
9:45 - GPS Signals: Part 1
Coarse/Acquisition (C/A)-code signal
Precision/encrypted (P/Y)-code signal
L2C signal
11:00 - 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
12:00 - Lunch on your own
1:30 - GLONASS Signals
GLONASS Standard Accuracy signals
GLONASS High Accuracy signals
Summary of GLONASS signals
2:45 - Galileo Signals: Part 1
Overview of planned GALILEO services
L1 Open signals
L1 Public regulated service signals
E6 commercial service signals
4:00 - 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 2 ends
|
DAY 3
Dr. Betz |
|
8:30 - Review of Day 2
Day 2 questions and answers
Day 2 discussion
QZSS Signals
L1 signals
E6 signals
L5 signals
Summary of QZSS signals
9:45 - 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
11:00 - 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
12:00 - Lunch on your own
1:30 - Signal Tracking and Loop Filters
Signal tracking overview
Digital loop filter design and performance
2:45 - Code Tracking
RMS bandwidth
Code tracking discriminators and
S-curves for different modulations
Code tracking accuracy
Code tracking loss of lock
4:00 - 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 3 ends
|
DAY 4
Dr. Betz |
|
8:30 – Review of Day 3
Day 3 questions and answers
Day 3 discussion
9:45 - Data Demodulation and PVT Calculation
Data demodulation and decoding
De-interleaving
Position, Velocity, Time (PVT) calculation
Summary of receiver processing
11:00 - Recovering and Using Signal Components
Time-multiplexed pilot and data components
Phase-multiplexed pilot and data components
Galileo E1 signal
Galileo E5 signal
12:00 - Lunch on your own
1:30 – Case Study: Receiver Processing of Galileo E1 OS and GPS L1C
Signals
Initial synchronization processing
Code tracking
Carrier tracking
Data message processing
2:45 - 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
4:00 - 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
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. |
Continuing
Education
Units |
2.4
(24 hours)
|
|
