1. MIMO WIRELESS COMMUNICATION SYSTEMS
Bhaskar D. Rao
University of California, San Diego
La Jolla, CA

2. Textbooks
Introduction to Space-Time Wireless Communications, A. Paulraj, R. Nabar and D. Gore, Cambridge University Press
Fundamentals of Wireless Communications, D. Tse and P. Vishwanath
Space-Time Block Coding for Wireless Communications, E. G. Larsson and P. Stoica
MIMO Wireless Communications, Edited by E. Biglieri, R. Calderbank ….

3. Prerequistive Classes
Digital Communication (ECE 258A,B)
Channel Coding (ECE 259A,B)
Information Theory (ECE 255A)
Statistical Signal Processing (ECE 251A)
Array Processing (ECE 251D)
Estimation Theory (ECE 275A,B)

4. Prerequisites

5. Course Grading Homeworks 40% Project 25% Exam 35% Theory and Matlab
Presentation on day of Finals
Exam 35%

6. Wireless Channel Characteristics
Fading: Multiple Paths with different phases add up at the receiver resulting in a random path gain
ISI: Paths with different delays causing intersymbol interference (Frequency Selective Channels)
CCI: Co-Channel users create interference
Noise: Thermal noise from electronics
Doppler: Channel varies over time (mobility)
Bandwidth: Bandwidth limited and so data rates can grow only as log(1 + SNR)

8. Space-Time Processing for Wireless Communications
Base station
Mobile
Goal: Exploit the spatial dimension to improve capacity and
quality of network

9. Variants of Multiple Antenna Systems

10. Terminology

11. Benefits of Space-Time Processing
Increased Capacity
Improved Signal Quality
Increased Coverage
Lower Power Consumption
Higher Data Rates
These requirements are often conflicting.
Need balancing to maximize system performance

12. Technical Rationale Spatial Diversity to Combat Fading
Spatial Signature for Interference Suppression
Array Gain enables Lower Power Consumption
Multiple Transmit Antennas provide Transmit Diversity
Capacity Improvements using Spatial Multiplexing

15. Scenarios Base Station or Mobile Receive versus Transmit Antennas
MIMO systems
Choice of Multiple Access Scheme (CDMA or TDMA)
Microcell versus Macrocell
Mobility versus Fixed

17. Beamforming

18. Multi-Input Multi-Output System

19. Capacity of MIMO systems

20. Role of Diversity
Two Fading Channels combined to improve SNR: Diversity gain

21. Spatial Diversity to Combat Fading