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Adaptive Relay Techniques For Ofdm-Based Cooperative Communication Systems, Xin Gao

Electronic Thesis and Dissertation Repository

Cooperative communication has been considered as a cost-effective manner to exploit the spatial diversity, improve the quality-of-service and extend transmission coverage. However, there are many challenges faced by cooperative systems which use relays to forward signals to the destination, such as the accumulation of multipath channels, complex resource allocation with the bidirectional asymmetric traffic and reduction of transmission efficiency caused by additional relay overhead. In this thesis, we aim to address the above challenges of cooperative communications, and design the efficient relay systems.

Starting with the channel accumulation problem in the amplify-and-forward relay system, we proposed two adaptive schemes for …