Adaptive Antenna Arrays: Fundamentals for Wireless Communications

Course 160

Summary:

This three-day course provides participants with an in-depth examination of Adaptive Antenna Array (AAA) Principles. Emphasis will be placed in extending the capabilities of 2G systems and improving performance of 3G WCDMA systems. Topics covered include a brief overview of the 3G standards (WCDMA and IS-2000), overview of the channel models used in receiver performance characterization, various signal processing algorithm choices, 2G and 3G performance discussion, system benefits discussion related to 3G. Emphasis will also be placed on the receiver signal processing algorithm differences between voice and data physical channels, in other words between high and low spreading factors, respectively. Upon completion the student would have received a very good overview of the algorithms used for AAA and the design trade-offs to be made when operating in various channel environments. We apply the techniques to both TDMA and CDMA systems. Lastly we address the question: "What do we do with this performance Improvement?" This is accomplished by looking at the link budget and trading off coverage vs. system cost vs. capacity vs. deployment scenarios.

Learning Objectives:

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

• Have a very good understand of the algorithms available
• Understand the channel impairments needed to be overcome
• Observe the realized performance benefits of this form of signal processing
• Understand performance differences in TDMA and WCDMA systems

Target Audience:

System arhictect designers entering or currently working in the field of wireless digital communications will benefit from this overview of practical array signal processing. An electrical engineering background (or equivalent practical experience) is required.

Outline:

Day One

Overview of 2G/3G Digital Cellular Standards
• TDMA • WCDMA • IS-2000
Channel Model Overview
• Spatial Variations and Statistical Models • Temporal Variations and Statistical Models

Day Two

Adaptive Arrays Algorithms
• Direct Matrix Inversion (DMI) • Recursive Least Squares (RLS) • Low Rank Signal Processing • Forward/Backward, etc. • Implementation (HW/SW) Complexity Discussion
AAA Performance Characterization in
• Flat Fading Channels • Flat Fading with Interference Channels (CCI/MAI) • Delay Spread Channels (ISI) • Delay Spread (ISI) with Interference Channels (CCI/MAI)

Day Three

Application to TDMA Systems
• Cost Function (MMSE/MSINR) Comparison • Performance Improvement Discussion
Application to WCDMA Systems
• Performance Improvement Discussion • Comparison of Voice and Data services: High/Low Spreading factor impact on algorithms
AAA benefits to WCDMA
• Link Budget Discussion: Impact on base station and terminal equipment • Capacity Improvement: Capacity Limitation

Subject Areas Covered

Antennas

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