Authors: Ekaterina Auer; César Benavente-Peces; Andreas Ahrens
Addresses: Department of Electrical Engineering, Hochschule Wismar, University of Technology, Business and Design, Wismar, Germany ' Department of Signal Theory and Communications, Universidad Politécnica de Madrid, Madrid, Spain ' Department of Electrical Engineering, Hochschule Wismar, University of Technology, Business and Design, Wismar, Germany
Abstract: Characterising how different types of uncertainty in the multiple-input multiple-output (MIMO) systems influence their performance is an important research topic. In this paper, we focus on the task of power allocation in fixed rate MIMO systems with singular value decomposition based channel separation. The interval analysis is used to develop a verified solution to the problem taking bounded uncertainty in parameters and rounding errors into account. We demonstrate that power allocation improves the bit error rate (BER) using an exemplary 4 × 4 MIMO channel for two distinct choices of the channel matrix and compute an upper bound on the BER under realistic uncertainty conditions. Besides, we show that a combined analytical/numerical procedure produces better results than the purely numerical one and identify parameters the mathematical model is most sensitive to.
Keywords: interval analysis; result verification; MIMO systems; power allocation.
International Journal of Reliability and Safety, 2018 Vol.12 No.1/2, pp.86 - 102
Received: 01 Mar 2017
Accepted: 15 Nov 2017
Published online: 13 Jun 2018 *