Low complexity antenna selection for V-BLAST systems with OSIC detection | Bae and Lee EURASIP Journal on Wireless Communications and Networking 2011 2011 6 EURASIP Journal on . http content 2011 1 6 Wireless Communications and Networking a SpringerOpen Journal RESEARCH Open Access Low complexity antenna selection for V-BLAST systems with OSIC detection Youngtaek Bae and Jungwoo Lee Abstract Multiple-input multiple-output MIMO systems have an advantage of spectral efficiency compared to single-input single-output systems which means that the MIMO systems have significantly higher data throughput. The V-BLAST Vertical Bell Laboratories Layered Space Time scheme is a popular transceiver structure which has relatively good performance. In the V-BLAST scheme ordered successive interference cancellation OSIC technique was proposed as a possible efficient detection method in terms of performance and complexity. However MIMO systems suffer from high complexity and implementation cost. As a practical solution a technique called antenna selection has been introduced. Since the existing literature considered only the capacity-based selection we develop an optimal selection method for V-BLAST scheme using OSIC detection with respect to error rate performance in this article. Its complexity is shown to be proportional to the fourth power of the number of transmit antennas. To reduce the complexity without significant performance degradation compared to the optimal selection method a near-optimal selection method is also proposed. Simulation results show that the proposed selection method is very close to the performance of optimal selection. Keywords MIMO systems antenna selection V-BLAST QR decomposition OSIC detection low complexity Introduction The spatial multiplexing systems with multiple transmit receive antennas referred to as multiple-input multipleoutput MIMO have been developed to provide high data rate with limited bandwidth . high spectral efficiency. MIMO techniques can also be used to increase the diversity .
