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Performance Analysis of Space Time Coding on Mimo and Cooperative Diversity System

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dc.contributor.advisor Hailemariam, Dereje (PhD)
dc.contributor.author Girma, Dereje
dc.date.accessioned 2018-06-25T13:17:34Z
dc.date.available 2018-06-25T13:17:34Z
dc.date.issued 2011-07
dc.identifier.uri http://etd.aau.edu.et/handle/123456789/3334
dc.description.abstract In a wireless network, users can relay information to exploit cooperative diversity, thereby increasing reliability. The uses of multiple transmit and receive antennas (MIMO) can help to exploit transmit and receive diversity respectively. This thesis discusses the application of a technique called space time block coding (STBC) on a system based on the joint use of cooperative diversity and MIMO schemes, which we hope intuitively that the system performance can be increased further. A source node, equipped with two transmits antennas, first encodes incoming data using STBC and then broadcasts the resulting code to relay and destination nodes. Then, the two relay nodes, each equipped with single antenna, either amplify-and-forward (AF) or decode-and-forward (DF) the received codes to the destination. The destination node combines (e.g., using maximum ratio combining (MRC)) signals received from the source’s and relay’s antennas and decodes the combined signal in order to recover the original data. As the signals from the source and relay are received through different paths, which are assumed to be spatially independent, spatial diversity can be exploited. Compared with point-to-point transmission system and simple Alamouti STBC system with no relays, AF based STBC system obtains one additional benefit, achieving spatial diversity offered by the relays. Moreover, the STBC-based DF cooperative system has two additional benefits. First, it achieves the spatial diversity offered by the relay channel and secondly, it has the ability to introduce the characteristics of STBC into the relay system. In addition, the system model and performance evaluation of these systems in various channel conditions and modulations (using simulation) will be addressed. en_US
dc.language.iso en en_US
dc.publisher Addis Ababa University en_US
dc.subject Diversity System en_US
dc.title Performance Analysis of Space Time Coding on Mimo and Cooperative Diversity System en_US
dc.type Thesis en_US

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