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Balaswamy, Ch.
- Detection of SINR Interference in MIMO Transmission Using Power Allocation
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1 Department of Electronics and Communication Engineering, QIS College of Engineering and Technology, Ongole, IN
1 Department of Electronics and Communication Engineering, QIS College of Engineering and Technology, Ongole, IN
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International Journal of Electronics and Communication Engineering, Vol 5, No 1 (2012), Pagination: 49-58Abstract
Low-complexity and reduced SINR interference cancellation of MIMO systems has attracted recent research attention. Under the bit error rate minimization criterion, an efficient detection ordering scheme for ordered successive interference cancellation detector is achieved for multiple antenna (MIMO) systems using power allocation (PA) scheme. In this paper, we derive a relation that makes the channel gains converge to their geometric mean from the convexity of the Q-function. Based on this approach, first, we design the fixed ordering algorithm, for which the geometric mean is used for a constant threshold. Further, the performance can be improved by modifying the scheme employing adaptive thresholds is developed using the correlation among the ordering results. In the proposed method, theoretical analysis and simulation results show that the ordering schemes using QR-decomposition reduce the computational complexity compared to the conventional method, and also bit-error-rate (BER) performance can be improved.Keywords
MIMO, SINR, OSIC, QR-Decomposition, Power AllocationReferences
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