A DETECTION TECHNIQUE OF SIGNAL IN MIMO SYSTEM

Harwinder Singh, Kuldeep Sharma

Abstract: MIMO techniques are based on multiple antennae in receiving and transmitting signals and also used in multipath propagation for the transformation of entire channel into many independent virtual channels. In MIMO system multiple antennae can increase the spectral efficiency/ reliability of radio channel without increasing bandwidth or transmit power. Commercially, it is not feasible in case of MIMO systems. So, simple and efficient receiver that can harness MIMO architecture benefits without draining mobile receiver battery power or long time to decode transmitted symbols was required. In this paper problem of receiver design for MIMO system in spatial multiplexing scheme that is Maximum likelihood detection problem also known as NP hard combinatorial optimization problem, which need an exponential search over the space of all possible transmitted symbols in order to find closest point in Euclidean sense to received symbols, has been considered. A metaheuristic algorithm for detection of MIMO wireless system based on the Ant colony optimization (ACO) technique using MATLAB give the best solution to the problem and find the optimal path for the receivers

Keywords: ACO, CO- combinatorial optimization, MATLAB, Metaheuristic, MIMO, NP Hard-non deterministic polynomial time hard, QAM- quadratic amplitude modulation

DOI: https://doi.org/10.15623/ijret.2014.0302048