Figure 14
From: A low complexity Hopfield neural network turbo equalizer
HNN-TE BPSK and 4-QAM performance in a long channel at various mobile speeds assuming perfect CSI. Shows the HNN-TE BPSK and 4-QAM performance in a system with CIR length L = 50 at mobile speeds of 20 km/h, 80 km/h, 140 km/h, and 200 km/h. Blue circle: BPSK HNN-TE - v = 20 km/h; Blue square: BPSK HNN-TE - v = 80 km/h; Blue diamond: BPSK HNN-TE - v = 140 km/h; Blue down triangle: BPSK HNN-TE - v = 200 km/h; Red circle: 4-QAM HNN-TE - v = 20 km/h; Red square: 4-QAM HNN-TE - v = 80 km/h; Red diamond: 4-QAM HNN-TE - v = 140 km/h; Red down triangle: 4-QAM HNN-TE - v = 200 km/h; Black dashed: coded AWGN bound.