K-NN Based Adaptive Modulation Coding (AMC) and Incremental Redundancy Hybrid Automatic Repeat Request (IR-HARQ) in MIMO

In Multiple Input Multiple Output (MIMO) technology, a cross layer design enhances the spectral efficiency, reliability and throughput of the network. In this paper, a cross-layer approach for k-NN based Adaptive Modulation Coding (AMC) and Incremental Redundancy Hybrid Automatic Repeat Request (IR-HARQ) in MIMO is proposed. The proposed cross layer approach connects physical layer and data link layer to enhance the performance of MIMO network. By means of MIMO fading channels, the coded symbols are forwarded in the physical layer on a frame by frame fashion subsequently using space time block coding. The receiver computes the signal to noise ratio (SNR) and forwards back to the AMC controller. The controller selects a suitable MCS for the next transmission through k-NN classifier supervised learning algorithm. HARQ is utilized at the data link layer to regulate packet retransmissions. The proposed technique is simulated using Matlab. Keywords— Adaptive Modulation and Coding (AMC), Incremental Redundancy-Hybrid Automatic Repeat Request (IR-HARQ), k-Nearest Neighbour (kNN), Multiple Input Multiple Output (MIMO).