Energy efficiency of transmit diversity systems under a realistic power consumption model
- Publisher: IEEE
acm: ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS | Data_CODINGANDINFORMATIONTHEORY
arxiv: Computer Science::Information Theory
We compare the downlink energy efficiency of spatial diversity multiple transmit antenna schemes. We determine the minimum required transmit power for a given outage probability. Our analysis shows that antenna selection is in general the most energy efficient option as it requires a single radio-frequency chain. We also investigate the limiting distances up to which the antenna selection technique outperforms the transmit beamforming scheme for different numbers of transmit antennas.