Summary:
This new course provides a detailed review of the characteristics of the 3G mobile wireless
standard and its adaptation to satellite communications in general and the MUOS system in
particular. While 3G has become common throughout the US and overseas, it was designed for
the terrestrial environment with short path lengths, high degrees of mobility, and operation in
the widest range of physical environments. It also supports numerous different types of user
devices and delivers good performance at low to medium bit rates. IP services are combined
with voice to provide users with a rich experience. Many of these benefits will accrue to military
users of 3G when it is applied over MUOS. However, the fact that MUOS is a GEO satellite
system and uses the UHF spectrum around 300 MHz poses many challenges to the developer
and operator. This course delves into the basic principles of the 3G standard and air interface.
We review where changes are needed and how they are being addressed, based on publically
available documents. The three-day course is intended for satellite communications engineers
and technicians who already understand basic principles of satellite links and equipment;
familiarity with terrestrial wireless systems is not required as these are covered as needed.
Tuition:
Instructor:
Course Outline:
- Mobile Satellite System Principles
1.1. GEO satellites
- 1.1.1. Multibeam
coverage
- 1.1.2. Beam to beam interference
-
1.1.3. Satellite Spectrum (300 MHz UHF versus L and S bands)
- 1.2. General Comparison of 3G Wireless and Satellite
- 1.3. UHF Propagation for MSS Links
- 1.3.1. Lineofsight
-
1.3.2. Multipath – Ricean vs. Rayleigh fading
- 1.3.3. Impact of the Ionosphere (Scintillation, Dispersion and Faraday
Effect)
- 1.3.4. Shadowing and Blockage
- 1.3.5. Realistic Environments for GEO MSS
- 1.3.6. Propagation Delay and Delay Spread
- 1.3.7. Application of Time Diversity
- 1.4. Waveforms vs. the Air Interface
- 1.4.1. Basic Transmission Architecture (multiplexing, encoding, FEC,
spreading, modulation)
- 1.4.2. Adapting to varying channel demands
- 1.4.3. Voice Quality of Vocoder Systems (G.729, MELPe, etc.)
- 1.4.4. Call and Service Management through an Air Interface Standard
- 1.5. CDMA using Direct Sequence Spread Spectrum
- 1.5.1. Spreading using Walsh Codes
- 1.5.2. Despreading
- 1.5.3. Power Control (Open Loop and Closed Loop)
- 1.5.4. Intra System and Inter System Interference
- 1.5.5. RAKE Receiver Architecture
- 1.5.6. Channel and Frequency Tracking
- 1.5.7. Base Station Beam Combining
- 1.5.8. Handover (Soft and Hard)
- 1.6. Frequency Division vs. Time Division Duplex
- 1.7. Calculating and Measuring Capacity
- 1.8. User Terminals (Fixed, Portable, Mobile)
- 1.9. Service Quality
- 3G Architecture and Technology
2.1. Requirements for Layers of 3G
- 2.2. Primary Elements
- 2.2.1. Core Network
- 2.2.2. Access Network – Radio Network Controller and Node Bs
- 2.2.3. User Equipment
- 2.3. Physical Layer Principles
- 2.3.1. Time Frame Structure and 10 ms Timing
- 2.3.2. Uplink (return link) Design
- 2.3.3. Downlink (forward link) Design
- 2.3.4. Acquisition Structure – Slotted ALOHA
- 2.3.5. Data Rate Matching
- 2.3.6. Spreading and Despreading (OVSF, scrambling and
synchronization)
- 2.3.7. Error Detect
ion, Correction and FEC Options
- Vehicle
- 3.3.4. Manpack
- 3.3.5. Handheld (typical configuration, antennas, link budget)
- 3.4. Base Stations
- 3.4.1. Kaband
- Links to Radio Access Facility
- 3.4.2. Kaband
- Feeder Link Availability
- Integration of 3G with Mobile Satellite
- Necessary Modifications to the 3G Air Interface/Waveform
- Propagation on GEO MSS Paths
- Call Handling
- Quality of Service
- Link Budget Analysis Examples
- Required Eb/No and Eb/Io
- Link Margin
- Downlink Example (Forward Link)
- Uplink Example (Return Link)
- WCDMA Radio System Engineering for MSS
- Base Station Design (Node B)
- Coverage and Capacity
- Interference Analysis and Mitigation
- Intersystem Interference
- Testing and Deployment Strategies
Tuition:
This course is not on the current schedule of open enrollment courses. If you are interested in attending this or another course as open enrollment, please contact us at (410) 956-8805 or at ati@aticourses.com and indicate the course name and number of students who wish to participate. ATI typically schedules open enrollment courses with a lead time of 3-5 months. Group courses can be presented at your facility at any time. For on-site pricing, request an on-site quote. You may also call us at (410) 956-8805 or email us at ati@aticourses.com.
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