Authors: Ramachandran Ramanathan; Madaswamy Jayakumar
Addresses: Department of Electronics and Communication Engineering, Amrita Vishwa Vidyapeetham, Coimbatore, 641112, India ' Department of Electronics and Communication Engineering, Amrita Vishwa Vidyapeetham, Coimbatore, 641112, India
Abstract: In this paper, we propose a cuckoo search approach to detect the transmitted symbols in spatially correlated multiple input multiple output (MIMO) channels. Detection is considered to be a challenging task in correlated channels due to the fact that the channel matrix tends to be ill conditioned or sometimes rank deficient. Currently, lattice reduction aided detection is understood to be the best approach for detection in spatially correlated channels. We propose cuckoo search as an effective approach to solve this problem. We provide the performance comparison of the proposed detector with various other detectors including lattice reduction aided detector. Through the results, we demonstrate the efficiency of cuckoo search detector over other detectors in uncorrelated and correlated channels as well. We corroborate that cuckoo search detector is a better choice over other existing detectors especially in spatially correlated MIMO channels.
Keywords: cuckoo search; MIMO detection; maximum likelihood; spatial correlation; metaheuristics; integer least squares; MIMO channels; transmitted symbols; multiple input multiple output.
International Journal of Mathematical Modelling and Numerical Optimisation, 2015 Vol.6 No.2, pp.101 - 113
Received: 26 Sep 2014
Accepted: 01 Mar 2015
Published online: 16 Jun 2015 *