Robert O. Abolade and Olumide O. Ajayi and Zacheaus K. Adeyemo and Solomon A. Adeniran
An Intelligent Scheme Switching for MIMO Systems Using Fuzzy Logic Technique
898 - 901
2018
12
12
International Journal of Electronics and Communication Engineering
https://publications.waset.org/pdf/10009900
https://publications.waset.org/vol/144
World Academy of Science, Engineering and Technology
Link adaptation is an important strategy for achieving robust wireless multimedia communications based on quality of service (QoS) demand. Scheme switching in multipleinput multipleoutput (MIMO) systems is an aspect of link adaptation, and it involves selecting among different MIMO transmission schemes or modes so as to adapt to the varying radio channel conditions for the purpose of achieving QoS delivery. However, finding the most appropriate switching method in MIMO links is still a challenge as existing methods are either computationally complex or not always accurate. This paper presents an intelligent switching method for the MIMO system consisting of two schemes transmit diversity (TD) and spatial multiplexing (SM) using fuzzy logic technique. In this method, two channel quality indicators (CQI) namely average received signaltonoise ratio (RSNR) and received signal strength indicator (RSSI) are measured and are passed as inputs to the fuzzy logic system which then gives a decision – an inference. The switching decision of the fuzzy logic system is fed back to the transmitter to switch between the TD and SM schemes. Simulation results show that the proposed fuzzy logic – based switching technique outperforms conventional static switching technique in terms of bit error rate and spectral efficiency.
Open Science Index 144, 2018