Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/3450
Title: Orthogonal and quasi-orthogonal space-time block codes
Authors: Yuen, Chau.
Keywords: DRNTU::Engineering::Electrical and electronic engineering::Wireless communication systems
DRNTU::Engineering::Electrical and electronic engineering::Computer hardware, software and systems
Issue Date: 2006
Source: Yuen, C. (2006). Orthogonal and quasi-orthogonal space-time block codes. Doctoral thesis, Nanyang Technological University, Singapore.
Abstract: In this thesis, we first study the complex version of Amicable Orthogonal Design (AOD) called Amicable Complex Orthogonal Design (ACOD), and use it to construct O-STBCs with practical implementation advantages, such as balanced power distribution properties and rational-number code coefficients. Next, we study the decoding of QO-STBC with noise-whitening pre-filter and propose Group-Constrained Linear Transformation (GCLT) as an alternative means to optimse the QO-STBC performance without increasing its decoding complexity. We also propose a new class of QO-STBC called QO-STBC with Minimum Decoding Complexity (MDC-QOSTBC). The decoding complexity of MDC-QOSTBC is only next to O-STBC, as MDC-QOSTBC requires a joint detection of only two real symbols. In the thesis, we examine the relationship between the mathematical structures of MDC-QOSTBC and AOD, and found out that MDC-QOSTBC can be constructed from two AODs that form a Preferred AOD Pair, which is a new concept introduced in this thesis. We derive the theoretical maximum achievable code rate of MDC-QOSTBC. Finally, we also propose for the first time differential space-time modulation (DSTM) schemes based on QO-STBC and MDC-QOSTBC to provide blind transmit diversity. The DSTM scheme based on QO-STBC is double-symbol decodable, while the DSTM scheme based on MDC-QOSTBC is single-symbol decodable, hence both have very low decoding complexity.
URI: http://hdl.handle.net/10356/3450
Rights: Nanyang Technological University
metadata.item.grantfulltext: restricted
metadata.item.fulltext: With Fulltext
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