Figure 13
From: A low complexity Hopfield neural network turbo equalizer
HNN-TE BPSK and 4-QAM performance in a long channel at a fixed speed assuming perfect CSI. Shows the HNN-TE BPSK and 4-QAM performance in systems with CIR lengths of L = 10, L = 20, L = 50, and L = 100 at a mobile speed of 20 km/h. Blue circle: BPSK HNN-TE - L = 10; Blue square: BPSK HNN-TE - L = 20; Blue diamond: BPSK HNN-TE - L = 50; Blue down triangle: BPSK HNN-TE - L = 100; Red circle: 4-QAM HNN-TE - L = 10; Red square: 4-QAM HNN-TE - L = 20; Red diamond: 4-QAM HNN-TE - L = 50; Red down triangle: 4-QAM HNN-TE - L = 100; Black dashed: coded AWGN bound.