Cooperative spatial multiplexing system
Darmawan, Andreas (2004) Cooperative spatial multiplexing system. Masters thesis, Iowa State University.
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We investigate and propose a new cooperative spatial multiplexing system, which does not require multiple antennas at the transmitter side. The source (transmitter), equipped with a single transmit antenna, utilizes other wireless terminals as relays in estimating and forwarding information to the destination (receiver), thus creating a cooperative communications environment. The proposed system exploits the rich-scattering wireless channel structure using the appropriate processing architecture to realize very high data rates over the channel. The destination decodes the noise and interference-corrupted data at its receiving antennas based on SNR (Signal-to-Noise Ratio) and LLR (Log-Likelihood Ratio) based detection ordering schemes, along with nulling and cancellation processes. MATLAB simulations show that the performance of the system improves, approaching that of a conventional spatial multiplexing system, as the relays are located closer to the source, given the total system power is optimally allocated between source and relays.
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