Mobile WiMAX

Course 176

Summary:

This two-day course provides a review of the system architectures, principles involved, techniques applied, and performance achieved in Mobile WiMAX’s mobile broadband access (MBWA) system. The typical types of packet switched data conveyed by this system are studied. Key enabling technologies are presented including: relevant digital modulation techniques, error detection/correction methods, and multiple access and NLOS techniques employed in Point-to Multipoint (PMP) systems. The non-line-of-sight (NLOS) mobile wireless fading path is reviewed and a coverage example provided. Key physical layer and MAC features are presented. Finally, the status of Mobile WiMAX is summarized and its key parameters compared to HSPA, LTE, and EV-DO

Learning Objectives:

Upon completing the course, the participant will be able to:

Understand the purpose of the WiMAX Forum and the relationship between this forum, the IEEE’s 802.16 standard and ETSI’s HIPERMAN standard.
Describe the structure of various forms of packet data signals conveyed by WiMAX BWA systems such as TCP/IP, VoIP, Ethernet and ATM.
Be familiar with the operation, spectral density, and bit error rate (BER) performance of digital modems employing BPSK, QPSK and QAM.
Explain the various path loss and fading phenomena possible over a fixed LOS wireless channel.
Understand the various path loss and fading phenomena possible over a NLOS wireless channel and perform link budget analyses and maximum range calculations.
Understand the basics of Block, Convolution, and Turbo codes and how these codes are applied to improve the BER performance of BWA systems.
Be familiar with the various techniques required for WiMAX PMP communications, such as the TDMA multiple access scheme, signal duplexing methods, and non-line-of-sight (NLOS) methods including Orthogonal Frequency Division Multiplexing (OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), Adaptive Antenna Systems (AAS), and Antenna Diversity Systems, including Space Time Coding (STC) and Multiple Input/Multiple Output (MIMO) systems.
Be aware of the key features of the WiMAX supported IEEE 802.16-2004 and ETSI’s HIPERMAN Air Interface Standards as well as those of the IEEE 802.16e-2005 mobility amendment.
Review the data sheet of any typical WiMAX BWA system and be able to decode the embedded alphabet soup!
Be aware of the key differences in specification and performance between Mobile WiMAX, EV-DO, HSPA, and LTE broadband wireless access systems.

Target Audience:

Hardware, software and system engineers, engineering managers, and product marketing managers involved in the planning, development, marketing and implementation of Mobile WiMAX access systems. Some familiarity on the part of participants with basic trigonometry, calculus, probability theory and general electronics will be helpful.

Outline:

Day One

Introduction
• WiMAX? • Mobile Broadband Wireless Access (MBWA) • Alternative MBWA Systems • Cellular Coverage: Cellular Structure, Handover
Wireless Payload: Packet Switched Data
• TCP/IP, VoIP, Mobile IP, Ethernet, ATM
Helpful Mathematical Tools
• Spectral Analysis • Statistical Methods • Thermal Noise
Enabling Technologies I
• Digital Modulation: The Basic Principles • BPSK, QPSK, 16 QAM, and 64 QAM modulation systems • Linear Modem Realization Techniques : Scrambling/descrambling, Carrier recovery, Timing recovery, and Differential encoding/decoding. • Transmission Frequency Components: Up conversion, Down conversion • The Receiver Front End
The Mobile NLOS Wireless Path
• Antennas • Free Space Propagation • Received Input Power and Fade Margin • Large-scale Path Loss : Mean Path Loss, shadowing • Small-scale path fading due to : Time delay spread, Doppler spread • Coverage Analysis Example
Enabling Technologies II
• Automatic Request for Repeat (ARQ) • Forward Error Detection/Correction : Block codes, Cyclic Redundancy Check (CRC), Convolution Codes, Turbo Codes, Hybrid ARQ (HARQ) • Transmission Signal Duplexing : FDD, H-FDD, TDD • Medium Access Control (MAC) • Scheduling • Dynamic Bandwidth Allocation (DBA) • Adaptive Modulation and Coding (AMC)

Day Two

Enabling Technologies II (cont'd)
• Non Line-of-Sight (NLOS) Techniques : Orthogonal Frequency Division Multiplexing (OFDM), Orthogonal Frequency Division Multiple Access (OFDMA), Scalable OFDMA (S-OFDMA), Single Carrier-Frequency Division Multiple Access (SC-FDMA), Receive Diversity, Transmit Delay Diversity (DD), Transmit Cyclic Delay Diversity (CDD), Transmit Space Block Time Coding (STBC) Diversity, Transmit Space Frequency Block Coding (SFBC), Multiple Input/Multiple Output (MIMO) scheme, Adaptive Antenna Systems (AAS), Transmitter Power Control (TPC) • Throughput/data rate definitions
Mobile WiMAX Standards and Systems
• 802.16 Air Interface Standard Evolution • WiMAX System Profile concept • 802.16 Air Interface Standard Overview • 802.16 MAC Layer : MAC overview, The MAC Service Specific Convergence Sublayer (CS), The MAC Common Part Sublayer (MAC CPS), the MAC Security Sublayer • WirelessMAN-OFDMA Physical Layer : FFT and Channel Bandwidth options, Scalable OFDMA, Key physical parameters, Subcarrier allocations, Fractional frequency reuse, Data and pilot, modulation, Transmitter power control, Channel coding, Duplexing, Spatial processing, HARQ, Receiver sensitivity, Frame structure, Raw data rates • WiBRO • Mobile WiMAX System Profiles • WiMAX Forum Certified Products • Connection to the Wider World • Mobile WiMAX, HSPA, and EV-DO comparison • Mobile WiMAX and LTE comparison • 802.16j overview • 802.16m overview
Mobile WiMAX Conclusion

Subject Areas Covered

Broadband Wireless Networks (WiMAX)

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