Investigations on Increased Data rate Differential Space-Time Block Codes for Single Carrier Wireless Systems
Rania Morsi
TL;DR
This thesis explores differential modulation and space-time coding techniques to enhance data rates and reliability in single carrier wireless systems without requiring channel knowledge, focusing on non-coherent detection and advanced coding schemes.
Contribution
It introduces the application of MDC-QOSTBC in differential non-coherent systems, demonstrating significant performance improvements over traditional differential OSTBCs.
Findings
MDC-QOSTBC outperforms differential OSTBCs in non-coherent systems.
MSDD effectively bridges the gap between coherent and non-coherent performance.
Differential schemes enable reliable transmission without channel state information.
Abstract
In this thesis, we study differential modulation schemes which do not need channel knowledge at the transmitter nor at the receiver. First, we consider single-antenna systems and investigate the use of Differential Amplitude Phase Shift Keying (DAPSK) modulation. We study the use of Multiple-Symbol Differential Detection (MSDD) to bridge the performance gap between coherent and non-coherent systems and remove the error floor associated with fast-fading channels. Second, we consider multi-antenna systems to combat fading and improve the transmission reliability. The resulting performance improvement (known as diversity) does not require additional bandwidth nor power. Achieving diversity using multiple antennas at the receiver (receive diversity) is proved to be a much simpler task than using multiple antennas at the transmitter (transmit diversity). However, in downlink mobile…
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Taxonomy
TopicsAdvanced Wireless Communication Techniques · Wireless Communication Networks Research · Cooperative Communication and Network Coding