| Summary: | 碩士 === 東海大學 === 電機工程學系 === 101 === To achieve the spatial diversity, cooperative communication can improve the performance of wireless communication systems through the assistance of relay station-based virtual antennas. Multiple Input Multiple Output(MIMO) is the use of separate multiple antennas transmitting signals, while the destination with multiple antennas receives and restores the original signal information. This architecture can significantly increase the data throughput of the system and the transmission distance, without the needs of more bandwidth or more transmit power. Space-time coding can also be an effective use of time and space diversity.
In this thesis, we use amplify-and-forward strategy for relay stations. Rayleigh Fading channel model is taken into consideration for both source-to-relay and relay-to-destination channels. To increase the system capacity, two system architectures with combination of MIMO and Space-time coding are proposed to compare with the conventional Alamouti architecture. We first derive the signal-to-noise ratio(SNR) for both new proposed architectures, and then simulate their symbol error rates as well as conventional Alamouti architecture. From the simulation results, we can find that both new proposed architectures outperform the conventional Alamouti architecture.
|
|---|
