Multi-antenna techniques are widely considered to be the most
promising avenue for significantly increasing the bandwidth
efficiency of wireless data transmission systems. In so called MIMO
(multiple input multiple output) systems, multiple antennas are
deployed both at the transmitter and the receiver. In MISO
(multiple input single output) systems, the receiver has only one
antenna, and the multiple transmit antennas are used for transmit
diversity.
The key aspects of multiple antenna transceiver techniques for
evolving 3G systems and beyond are presented. MIMO and MISO
(transmit diversity) techniques are explained in a common setting.
In particular, the book covers linear processing transmit diversity
methods with and without side information at the transmitter
(feedback), including the current transmit diversity concepts in
the WCDMA standards, as well as promising MIMO concepts, crucial
for future high data rate systems.
As an example, MIMO and MISO aspects of 3GPP HSDPA (high speed
downlink packet access) will be considered. Furthermore, examples
of high throughput, low complexity space-time codes will be
provided, when signalling without side information (open loop
concepts). The theory of linear space-time block codes will be
developed, and optimal non-orthogonal high throughput codes will be
constructed, both for MIMO and MISO systems. Performance may be
further improved by feedback from receiver to transmitter. The
corresponding closed loop modes in the current 3GPP specifications
will be discussed, along with their extensions for more than two
transmit antennas. In addition, feedback signalling for MIMO
channels will be addressed. Optimal quantisation methods of the
feedback messages will be discussed. Finally, hybrid schemes are
constructed, where the amount of feedback is reduced using partly
open, partly closed loop signalling.
* Provides a concise and up-to-date description of perhaps the most
active area of research in wireless communications
* Unique in presenting recent developments in both WCDMA and
MIMO
* MIMO and MISO techniques are explained in a common setting
* Special emphasis is placed on combining theoretical understanding
with engineering applicability
For Research engineers in academia and industry, and development
engineers in 3G system design as well as research students.
Cuprins
Preface.
Acronyms.
PART I: INTRODUCTION.
Background.
Diversity Gain, SNR Gain and Rate Increase.
PART II: OPEN-LOOP METHODS.
Open-loop Concepts: Background.
Matrix Modulation: Low SNR Aspects.
Increasing Symbol Rate: Quasi-orthogonal Layers.
Receiver Algorithms.
Matrix Modulation: High SNR Aspects.
Robust and Practical Open-loop Designs.
High-rate Designs for MIMO Systems.
PART III: CLOSED-LOOP METHODS.
Closed-loop Methods: Selected Multi-antenna Extensions.
Analysis of Closed-loop Concepts.
Hybrid Closed-loop and Open-loop Methods.
Appendix A: Symmetries, Invariants and Inequalities.
Appendix B: Matrix Representations of Clifford Algebras.
References.
Index.
Despre autor
Ari Hottinen is the author of Multi-antenna Transceiver Techniques for 3G and Beyond, published by Wiley.
Olav Tirkkonen is the author of Multi-antenna Transceiver Techniques for 3G and Beyond, published by Wiley.
Risto Wichman is the author of Multi-antenna Transceiver Techniques for 3G and Beyond, published by Wiley.
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