The doctoral dissertations of the former Helsinki University of Technology (TKK) and Aalto University Schools of Technology (CHEM, ELEC, ENG, SCI) published in electronic format are available in the electronic publications archive of Aalto University - Aaltodoc.
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Linear Space-Time Modulation in Multiple-Antenna Channels

Ari Hottinen

Dissertation for the degree of Doctor of Science in Technology to be presented with due permission of the Department of Computer Science and Engineering for public examination and debate in Auditorium T2 at Helsinki University of Technology (Espoo, Finland) on the 25th of November, 2004, at 12 o'clock noon.

Overview in PDF format (ISBN 951-22-7376-4)   [482 KB]
Dissertation is also available in print (ISBN 951-22-7375-6)

Abstract

This thesis develops linear space–time modulation techniques for (multi-antenna) multi-input multi-output (MIMO) and multiple-input single-output (MISO) wireless channels. Transmission methods tailored for such channels have recently emerged in a number of current and upcoming standards, in particular in 3G and "beyond 3G" wireless systems. Here, these transmission concepts are approached primarily from a signal processing perspective.

The introduction part of the thesis describes the transmit diversity concepts included in the WCDMA and cdma2000 standards or standard discussions, as well as promising new transmission methods for MIMO and MISO channels, crucial for future high data-rate systems. A number of techniques developed herein have been adopted in the 3G standards, or are currently being proposed for such standards, with the target of improving data rates, signal quality, capacity or system flexibility.

The thesis adopts a model involving matrix-valued modulation alphabets, with different dimensions usually defined over space and time. The symbol matrix is formed as a linear combination of symbols, and the space-dimension is realized by using multiple transmit and receive antennas. Many of the transceiver concepts and modulation methods developed herein provide both spatial multiplexing gain and diversity gain. For example, full-diversity full-rate schemes are proposed where the symbol rate equals the number of transmit antennas. The modulation methods are developed for open-loop transmission. Moreover, the thesis proposes related closed-loop transmission methods, where space–time modulation is combined either with automatic retransmission or multiuser scheduling.

This thesis consists of an overview and of the following 8 publications:

  1. Hottinen A. and Tirkkonen O., 2001. A randomization technique for non-orthogonal space-time block codes. In: Proceedings of the 53rd IEEE Vehicular Technology Conference (VTC 2001 Spring). Rhodes, Greece, 6-9 May 2001, pages 1479-1482. © 2001 IEEE. By permission.
  2. Tirkkonen O. and Hottinen A., 2001. Improved MIMO performance with non-orthogonal space-time block codes. In: Proceedings of the 2001 IEEE Global Telecommunications Conference (GLOBECOM 2001). San Antonio, Texas, USA, 25-29 November 2001, pages 1122-1126. © 2001 IEEE. By permission.
  3. Tirkkonen O. and Hottinen A., 2002. Square-matrix embeddable space–time block codes for complex signal constellations. IEEE Transactions on Information Theory 48, number 2, pages 384-395. © 2002 IEEE. By permission.
  4. Hottinen A. and Tirkkonen O., 2002. Non-orthogonal space-time block code with symbol rate two. In: Proceedings of the 2002 Conference on Information Sciences and Systems (CISS 2002). Princeton, NJ, USA, 20-22 March 2002, 5 pages.
  5. Hottinen A. and Tirkkonen O., 2003. Matrix modulation and adaptive retransmission. In: Proceedings of the Seventh International Symposium on Signal Processing and its Applications (ISSPA 2003). Paris, France, 1-4 July 2003, pages 221-224. © 2003 IEEE. By permission.
  6. Hottinen A., 2003. Multiuser scheduling with matrix modulation. In: Proceedings of the 3rd IEEE International Symposium on Signal Processing and Information Technology (ISSPIT 2003). Darmstadt, Germany, 14-17 December 2003, pages 5-8. © 2003 IEEE. By permission.
  7. Hottinen A., 2004. Matrix-modulated closed-loop MIMO with multiuser scheduling. In: Proceedings of the 2004 Conference on Information Sciences and Systems (CISS 2004). Princeton, NJ, USA, 17-19 March 2004, 5 pages.
  8. Hottinen A. and Tirkkonen O., 2004. Precoder designs for high rate space–time block codes. In: Proceedings of the 2004 Conference on Information Sciences and Systems (CISS 2004). Princeton, NJ, USA, 17-19 March 2004, 6 pages.

Keywords: space–time coding, modulation, multiple-input multiple-output (MIMO) channel, open-loop transmission, closed-loop transmission

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© 2004 Helsinki University of Technology

Last update 2011-05-26