Издательство Imperial College Press, 2007, -209 pp.Owing to their ability to multiply wireless capacity, mitigate slow fading, and facilitate new adaptive communications beyond the limits of conventional single-antenna wireless systems, MIMO and Space Time Coding techniques (which combine coding, modulation and signal processing designs in systems employing multiple transmit/receive antennas) have generated much research interest in recent years. Their adoption in cellular mobile radio, wireless LAN and wireless MAN standards have also marked their increasing significance in commercial broadband wireless systems.
An important class of space-time code is the Orthogonal Space-Time Block Code (0-STBC), which is attractive for its low decoding complexity, low decoding latency, and ability to provide full transmit diversity for mitigating slow fading by requiring multiple antennas only at the base stations or access points (hence low cost per user). However 0-STBC suffers from low code rate (hence non-optimal MIMO capacity) when used with more than 2 transmit antennas and complex modulation. This rate disadvantage can be alleviated by a class of group-decodable STBC design called the Quasi-Orthogonal STBC (QO-STBC). The decoding complexity of QO-STBC is higher than that of 0-STBC, but it can be capped by proper code design.
This monograph focuses on the design and analysis of full-diversity QO-STBC with very low decoding complexity and high code rate. Much of the monograph is dedicated to double-symbol-decodable QO-STBC and single-symbol-decodable QO-STBC, which have the two lowest levels of decoding complexity among all QO-STBC. Apart from coherent code detection, differential space-time modulation designs for the non-coherent (blind) detection of double- and single-symbol-decodable QO-STBC are also presented. The latter part of this monograph shifts the design focus away from minimum decoding complexity to constant full rate (ix. code rate = 1) for arbitrary number of transmit antennas, and finally to code rate 1.
Introduction of MIMO Channel and Space-Time Block Code.
Orthogonal and Quasi-Orthogonal Space-Time Block Code.
Insights of QO-STBC.
Quasi-Orthogonal Space-Time Block Code with Minimum Decoding Complexity.
Differential QO-STBC.
Rate. Complexity and Diversity Trade-off in QO-STBC.
Other Developments and Applications of QO-STBC.
Conclusions.
